地外科学 · 全部实体（第 97 / 100 页）

本页收录第 9601–9700 条，共 10000 条 · 返回 地外科学 首页

• Molecular diversity as a biosignature
  The search for life in the Solar System hinges on data from planetary missions. Detecting biosignatures based on molecular identity, isotopic composition, or chiral excess requires measurements that current and planned missions can only partially provide. We i…
  arxiv Gideon Yoffe, Fabian Klenner, Barak Sober, Yohai Kaspi 等 2025-11-01T12:00:15Z 置信度 0.78 astro-ph.EPstat.AP
• Comparative biosignatures with systemic retrievals
  The discovery of inhabited exoplanets hinges on identifying biosignature gases. JWST can reveal biosignature gases, though current discoveries have yet to evidence life. The central challenge is attribution: how can we confidently identify biogenic sources whi…
  arxiv Tereza Constantinou, Oliver Shorttle, Miles Cranmer, Paul B. Rimmer 2025-05-02T18:00:49Z 置信度 0.78 astro-ph.EPastro-ph.IM
• Detectability Simulations of a NIR Surface Biosignature on Proxima Centauri b with Future Space Observatories
  Telescope missions are currently being designed which will make direct imaging of habitable exoplanets possible in the near future, and studies are needed to quantify the detectability of biosignature features in the planet's reflectance spectrum. We simulated…
  arxiv Connor O. Metz, Nancy Y. Kiang, Geronimo L. Villanueva, Mary N. Parenteau 等 2024-09-11T14:19:48Z 置信度 0.78 astro-ph.EPastro-ph.IM
• The Case and Context for Atmospheric Methane as an Exoplanet Biosignature
  Methane has been proposed as an exoplanet biosignature. Imminent observations with the James Webb Space Telescope may enable methane detections on potentially habitable exoplanets, so it is essential to assess in what planetary contexts methane is a compelling…
  arxiv Maggie A. Thompson, Joshua Krissansen-Totton, Nicholas Wogan, Myriam Telus 等 2022-04-08T19:14:48Z 置信度 0.78 astro-ph.EP
• Detectors and cooling technology for direct spectroscopic biosignature characterization
  Direct spectroscopic biosignature characterization (hereafter "biosignature characterization") will be a major focus for future space observatories equipped with coronagraphs or starshades. Our aim in this article is to provide an introduction to potential det…
  arxiv Bernard J. Rauscher, Edgar R. Canavan, S. H. Moseley, John E. Sadleir 等 2016-07-19T19:47:44Z 置信度 0.78 astro-ph.IM
• A framework for evaluating biosignature potential against the abiotic baseline on ocean worlds
  Ocean worlds are considered as targets for life detection missions because they meet several key requirements for habitability. However, identifying potential life on other worlds requires observing clear and unambiguous biosignature signals above the existing…
  arxiv Peter M. Higgins, Weibin Chen, Oliver Warr, Lucas M. Fifer 等 2026-05-14T19:00:57Z 置信度 0.78 astro-ph.EP
• Inferring Chemical Disequilibrium Biosignatures for Proterozoic Earth-Like Exoplanets
  Chemical disequilibrium quantified via available free energy has previously been proposed as a potential biosignature. However, exoplanet biosignature remote sensing work has not yet investigated how observational uncertainties impact the ability to infer a li…
  arxiv Amber V. Young, Tyler D. Robinson, Joshua Krissansen-Totton, Edward W. Schwieterman 等 2023-11-10T14:30:06Z 置信度 0.78 astro-ph.EP
• Spectropolarimetry of primitive phototrophs as global surface biosignatures
  Photosynthesis is an ancient metabolic process that began on the early Earth, offering plentiful energy to organisms that utilize it, to the extent that they can achieve global significance. The potential exists for similar processes to operate on habitable ex…
  arxiv William B. Sparks, M. Niki Parenteau, Robert E. Blankenship, Thomas A. Germer 等 2020-10-05T16:24:12Z 置信度 0.78 astro-ph.EPphysics.bio-ph
• Assessment of Ammonia as a Biosignature Gas in Exoplanet Atmospheres
  Ammonia (NH3) in a terrestrial planet atmosphere is generally a good biosignature gas, primarily because terrestrial planets have no significant known abiotic NH3 source. The conditions required for NH3 to accumulate in the atmosphere are, however, stringent. …
  arxiv Jingcheng Huang, Sara Seager, Janusz J. Petkowski, Sukrit Ranjan 等 2021-07-26T18:33:04Z 置信度 0.78 astro-ph.EP
• Monomer abundance distribution patterns as a universal biosignature: Examples from terrestrial and digital life
  Organisms leave a distinctive chemical signature in their environment because they synthesize those molecules that maximize their fitness. As a result, the relative concentrations of related chemical monomers in life-bearing environmental samples reflect, in p…
  arxiv Evan D. Dorn, Kenneth H. Nealson, Christoph Adami 2011-01-05T15:51:02Z 置信度 0.78 q-bio.BMastro-ph.EPphysics.bio-phq-bio.PE
• A generalised microbial cell model for methane biosignature predictions
  The majority of potentially habitable planets detected to date are likely quite different to Earth, for example, being larger in radius and mass, differing rotation rates and with host star spectra unlike the Sun. Therefore the first alien life detected will p…
  arxiv Arwen E. Nicholson, Nathan J. Mayne 2026-07-07T15:01:57Z 置信度 0.78 astro-ph.EP
• Bioverse: Potentially Observable Exoplanet Biosignature Patterns Under the UV Threshold Hypothesis for the Origin of Life
  A wide variety of scenarios for the origin of life have been proposed, with many influencing the prevalence and distribution of biosignatures across exoplanet populations. This relationship suggests these scenarios can be tested by predicting biosignature dist…
  arxiv Martin Schlecker, Dániel Apai, Antonin Affholder, Sukrit Ranjan 等 2025-04-05T19:41:06Z 置信度 0.78 astro-ph.EP
• Expanding the Timeline for Earth's Photosynthetic Red Edge Biosignature
  When Carl Sagan observed the Earth during a Gallileo fly-by in 1993, he found a widely distributed surface pigment with a sharp reflection edge in the red part of the spectrum, which, together with the abundance of gaseous oxygen and methane in extreme thermod…
  arxiv Jack T. O'Malley-James, Lisa Kaltenegger 2019-07-10T12:02:54Z 置信度 0.78 astro-ph.EP
• Assessment of Isoprene as a Possible Biosignature Gas in Exoplanets with Anoxic Atmospheres
  Research for possible biosignature gases on habitable exoplanet atmosphere is accelerating. We add isoprene, C5H8, to the roster of biosignature gases. We found that formation of isoprene geochemical formation is highly thermodynamically disfavored and has no …
  arxiv Zhuchang Zhan, Sara Seager, Janusz Jurand Petkowski, Clara Sousa-Silva 等 2021-03-26T02:38:36Z 置信度 0.78 astro-ph.EPphysics.chem-ph
• The K Dwarf Advantage for Biosignatures on Directly Imaged Exoplanets
  Oxygen and methane are considered to be the canonical biosignatures of modern Earth, and the simultaneous detection of these gases in a planetary atmosphere is an especially strong biosignature. However, these gases may be challenging to detect together in the…
  arxiv Giada N. Arney 2020-01-28T16:42:09Z 置信度 0.78 astro-ph.EPastro-ph.SR
• Oxygenated False Positive Biosignatures in Mars-like Exoplanet Atmospheres
  Oxygen is a well-studied biosignature. Studying potential abiotic pathways for O2 build-up in exoplanet atmospheres is essential for evaluating whether the detection of O2 would constitute a biosignature detection on other worlds. Previous modeling efforts in …
  arxiv Margaret Turcotte Seavey, Shawn Domagal-Goldman, Amber Young, Jaime Crouse 等 2026-03-11T17:45:53Z 置信度 0.78 astro-ph.EP
• Biosignature Anisotropy Modeled on Temperate Tidally Locked M-dwarf Planets
  A planet's atmospheric constituents (e.g., O$_2$, O$_3$, H$_2$O$_v$, CO$_2$, CH$_4$, N$_2$O) can provide clues to its surface habitability, and may offer biosignature targets for remote life detection efforts. The plethora of rocky exoplanets found by recent t…
  arxiv Howard Chen, Eric T. Wolf, Ravi Kopparapu, Shawn Domagal-Goldman 等 2018-10-30T17:58:07Z 置信度 0.78 astro-ph.EP
• Detectability of biosignatures on LHS 1140 b
  Terrestrial extrasolar planets around low-mass stars are prime targets when searching for atmospheric biosignatures with current and near-future telescopes. The habitable-zone Super-Earth LHS 1140 b could hold a hydrogen-dominated atmosphere and is an excellen…
  arxiv Fabian Wunderlich, Markus Scheucher, John Lee Grenfell, Franz Schreier 等 2020-12-21T15:30:16Z 置信度 0.78 astro-ph.EPphysics.chem-ph
• Potential Biosignatures in Super-Earth Atmospheres II. Photochemical Responses
  Spectral characterization of Super-Earth atmospheres for planets orbiting in the Habitable Zone of M-dwarf stars is a key focus in exoplanet science. A central challenge is to understand and predict the expected spectral signals of atmospheric biosignatures (s…
  arxiv J. L. Grenfell, S. Gebauer, M. Godolt, K. Palczynski 等 2013-03-27T12:27:47Z 置信度 0.78 astro-ph.EP
• The effect of spectral resolution on biosignature detection via reflected light observations of the Earth through time
  NASA's Habitable Worlds Observatory (HWO) will search for biosignatures on Earth-like exoplanets using reflected light spectroscopy. A critical instrument design parameter is resolving power, which must balance biosignature detectability against exposure time …
  arxiv Samantha Gilbert-Janizek, Jacob Lustig-Yaeger, Joshua Krissansen-Totton 2026-04-29T17:39:38Z 置信度 0.78 astro-ph.EPastro-ph.IM
• Can Isotopologues Be Used as Biosignature Gases in Exoplanet Atmospheres?
  Isotopologue ratios are anticipated to be one of the most promising signs of life that can be observed remotely. On Earth, carbon isotopes have been used for decades as evidence of modern and early metabolic processes. In fact, carbon isotopes may be the oldes…
  arxiv Ana Glidden, Sara Seager, Janusz J. Petkowski, Shuhei Ono 2024-01-26T19:00:13Z 置信度 0.78 astro-ph.EP
• Organosulfur Chemistry on sub-Neptunes: Implications for hazes and biosignatures
  The organosulfur biosignature gases dimethylsulfide (DMS) and dimethlydisulfide (DMDS) have recently been claimed to be present in the atmosphere of sub-Neptune exoplanet K2-18b, leading to the suggestion of possible extraterrestrial life. Abiotic formation pa…
  arxiv Sean Jordan, Shang-Min Tsai, Paul B. Rimmer, Oliver Shorttle 2026-03-19T14:00:44Z 置信度 0.78 astro-ph.EP
• Life, Machine Learning, and the Search for Habitability: Predicting Biosignature Fluxes for the Habitable Worlds Observatory
  Future direct-imaging flagship missions, such as NASA's Habitable Worlds Observatory (HWO), face critical decisions in prioritizing observations due to extremely stringent time and resource constraints. In this paper, we introduce two advanced machine-learning…
  arxiv Mark Moussa, Amber V. Young, Brianna Isola, Vasuda Trehan 等 2026-01-18T19:43:48Z 置信度 0.78 cs.LGcs.AIcs.CV
• An Agnostic Biosignature Based on Modeling Panspermia and Terraforming
  The search for a second instance of life is one of the greatest problems of modern science. Outside of creating an artificial origin of life on Earth, the primary targets for the search for life are planets inside or outside the solar system. Realistically, th…
  arxiv Harrison B. Smith, Lana Sinapayen 2024-03-21T07:42:07Z 置信度 0.78 astro-ph.EPastro-ph.IMq-bio.PEq-bio.QM
• Exoplanet Biosignatures: Future Directions
  Exoplanet science promises a continued rapid accumulation of new observations in the near future, energizing a drive to understand and interpret the forthcoming wealth of data to identify signs of life beyond our Solar System. The large statistics of exoplanet…
  arxiv Sara I. Walker, William Bains, Leroy Cronin, Shiladitya DasSarma 等 2017-05-23T04:10:10Z 置信度 0.78 astro-ph.EP
• Biosignature detectability on transiting habitable worlds with ELT/ANDES
  The search for life beyond the Solar System is at a turning point, transitioning from theoretical predictions to observations enabled by next-generation observatories. The Extremely Large Telescope (ELT) will host the ArmazoNes high Dispersion Echelle Spectrog…
  arxiv E. Kurzawa-Ferrandez, A. Bello-Arufe, R. Hu 2026-07-13T18:00:01Z 置信度 0.78 astro-ph.EPastro-ph.IM
• pyBioSig: optimizing group discrimination using genetic algorithms for biosignature discovery
  In medical sciences, a biomarker is "a characteristic that is objectively measured and evaluated as an indicator of normal biological processes, pathogenic processes, or pharmacologic responses to a therapeutic intervention". Molecular experiments are providin…
  arxiv Frederico G. C. Arnoldi, Rodrigo F. Rodrigues, Celio L. Silva 2015-07-30T14:23:54Z 置信度 0.78 q-bio.QM
• Quantifying Building Blocks of Life in Planetary Analog Materials: Implications for Prebiotic Chemistry and Biosignature Identification
  Building blocks of life such as amino acids, nucleobases, and fatty acids are central to prebiotic chemistry and represent key targets in the search for planetary biosignatures. In planetary materials, biomolecules typically occur at trace levels within comple…
  arxiv Xiaoou Luo, Chao He, Zhengbo Yang, Yingjian Wang 等 2026-03-29T09:40:00Z 置信度 0.78 astro-ph.EP
• Baseline Requirements For Detecting Biosignatures with the HabEx and LUVOIR Mission Concepts
  A milestone in understanding life in the universe is the detection of biosignature gases in the atmospheres of habitable exoplanets. Future mission concepts under study by the 2020 decadal survey, e.g., HabEx and LUVOIR, have the potential of achieving this go…
  arxiv Ji Wang, Dimitri Mawet, Renyu Hu, Garreth Ruane 等 2018-06-12T04:17:49Z 置信度 0.78 astro-ph.EP
• Climates of Terrestrial Exoplanets and Biosignatures
  Understanding the climates of terrestrial exoplanets and the detectability of biosignatures is an inherently interdisciplinary challenge, requiring the integration of insights from Solar System exploration, exoplanet observations and climate science. Building …
  arxiv Siddharth Bhatnagar, Emeline Bolmont, Nikita J. Boeren, Janina Hansen 等 2026-01-28T13:52:51Z 置信度 0.78 astro-ph.EP
• Habitable Worlds Observatory Living Worlds Working Group: Surface Biosignatures on Potentially Habitable Exoplanets
  The Habitable Worlds Observatory (HWO) is the first NASA Astrophysics flagship mission with a key science goal of searching for signs of life on rocky habitable exoplanets beyond our solar system. The Living Worlds Community Working Group was charged with inve…
  arxiv Niki Parenteau, Anna Grace Ulses, Connor Metz, Nancy Y. Kiang 等 2026-01-12T20:34:11Z 置信度 0.78 astro-ph.IMastro-ph.EP
• Some inconvenient truths about biosignatures involving two chemical species on Earth-like exoplanets
  The detection of strong thermochemical disequilibrium in the atmosphere of an extrasolar planet is thought to be a potential biosignature. In this article we present a new kind of false positive that can mimic a disequilibrium or any other biosignature that in…
  arxiv Hanno Rein, Yuka Fujii, David S. Spiegel 2014-04-25T20:00:18Z 置信度 0.78 astro-ph.EPastro-ph.IMastro-ph.SR
• The Vegetation Red Edge Biosignature Through Time on Earth and Exoplanets
  The high reflection of land vegetation in the near-infrared, the vegetation red edge (VRE), is often cited as a spectral biosignature for surface vegetation on exoplanets. The VRE is only a few percent change in reflectivity for a disk-integrated observation o…
  arxiv Jack T. O'Malley-James, Lisa Kaltenegger 2018-09-24T10:37:55Z 置信度 0.78 astro-ph.EP
• When is chemical disequilibrium in Earth-like planetary atmospheres a biosignature versus an anti-biosignature? Disequilibria from dead to living worlds
  Chemical disequilibrium in exoplanetary atmospheres (detectable with remote spectroscopy) can indicate life. The modern Earth's atmosphere-ocean system has a much larger chemical disequilibrium than other solar system planets with atmospheres because of oxygen…
  arxiv Nicholas Wogan, David Catling 2019-11-15T19:48:29Z 置信度 0.78 astro-ph.EP
• Information Gain as a Tool for Assessing Biosignature Missions
  We propose the mathematical notion of information gain as a way of quantitatively assessing the value of biosignature missions. This makes it simple to determine how mission value depends on design parameters, prior knowledge, and input assumptions. We demonst…
  arxiv Benjamin Fields, Sohom Gupta, McCullen Sandora 2023-07-13T01:16:55Z 置信度 0.78 astro-ph.EPphysics.data-an
• A procedure for observing rocky exoplanets to maximize the likelihood that atmospheric oxygen will be a biosignature
  Here we advocate an observational strategy to help prioritize exoplanet observations. It starts with more easily obtained observational data, and ranks exoplanets for more difficult follow-up observations based on the likelihood of avoiding planets for which o…
  arxiv Steven J. Desch, Stephen Kane, Carey M. Lisse, Cayman T. Unterborn 等 2018-01-22T02:09:29Z 置信度 0.78 astro-ph.EP
• GCM Constraints on the Detectability of the CO$_2$-CH$_4$ Biosignature Pair on TRAPPIST-1e with JWST
  Terrestrial exoplanets such as TRAPPIST-1e will be observed in a new capacity with JWST/NIRSpec, which is expected to be able to detect CO$_2$, CH$_4$, and O$_2$ signals, if present, with multiple co-added transit observations. The CO$_2$-CH$_4$ pair in partic…
  arxiv Yoav Rotman, Thaddeus D. Komacek, Geronimo L. Villanueva, Thomas J. Fauchez 等 2022-12-09T18:54:14Z 置信度 0.78 astro-ph.EP
• The effect of lightning on the atmospheric chemistry of exoplanets and potential biosignatures
  Lightning has been suggested to play a role in triggering the occurrence of bio-ready chemical species. Future missions (PLATO, ARIEL, HWO, LIFE) and ground-based ELTs will investigate the atmospheres of potentially habitable exoplanets. We aim to study the ef…
  arxiv Patrick Barth, Eva E. Stüeken, Christiane Helling, Edward W. Schwieterman 等 2024-02-21T10:34:53Z 置信度 0.78 astro-ph.EP
• Detecting Biosignatures in Nearby Rocky Exoplanets using High-Contrast Imaging and Medium-Resolution Spectroscopy with Extremely Large Telescope
  In the upcoming decades, one of the primary objectives in exoplanet science is to search for habitable planets and signs of extraterrestrial life in the universe. Signs of life can be indicated by thermal-dynamical imbalance in terrestrial planet atmospheres. …
  arxiv Huihao Zhang, Ji Wang, Michael K. Plummer 2023-11-29T22:12:38Z 置信度 0.78 astro-ph.EPastro-ph.IM
• Substrate-Agnostic 3x: Biosignatures, Technosignatures, Ecologies
  Substrate-agnostic perspectives are currently attracting increased attention. For example, it has become customary to refer to agnostic biosignatures to reflect the range of alternative extraterrestrial biospheres and to account for the deeper philosophical de…
  arxiv Lukáš Likavčan 2026-07-02T03:44:13Z 置信度 0.78 physics.gen-ph
• Biofluorescent Worlds II. Biological fluorescence induced by stellar UV flares, a new temporal biosignature
  Our first targets in the search for signs of life are orbiting nearby M stars, such as the planets in the Proxima Centauri, Ross-128, LHS-1140, and TRAPPIST-1 systems. Future ground-based discoveries, and those from the TESS mission, will provide additional cl…
  arxiv Jack T. O'Malley-James, Lisa Kaltenegger 2016-08-24T19:53:19Z 置信度 0.78 astro-ph.EP
• Life on the Edge: Using Planetary Context to Enhance Biosignatures and Avoid False Positives
  We use a probability theory framework to discuss the search for biosignatures. This perspective allows us to analyse the potential for different biosignatures to provide convincing evidence of extraterrestrial life and to formalise frameworks for accumulating …
  arxiv Rudy Arthur, Arwen E. Nicholson, Nathan J. Mayne 2025-04-25T15:44:28Z 置信度 0.78 astro-ph.EPq-bio.PE
• Biofluorescent Worlds I: Global Biological Fluorescence as a Biosignature
  In this paper, we analyze a new possible biological surface feature for habitable worlds orbiting other stars: biofluorescence. High ultraviolet (UV) and blue radiation fluxes drive the strongest biofluorescence in terrestrial fluorescent pigments and proteins…
  arxiv J. T. O'Malley-James, L. Kaltenegger 2019-08-12T11:12:01Z 置信度 0.78 astro-ph.EP
• Abundant atmospheric methane from volcanism on terrestrial planets is unlikely and strengthens the case for methane as a biosignature
  The disequilibrium combination of abundant methane and carbon dioxide has been proposed as a promising exoplanet biosignature that is readily detectable with upcoming telescopes such as the James Webb Space Telescope. However, few studies have explored the pos…
  arxiv Nicholas Wogan, Joshua Krissansen-Totton, David C. Catling 2020-09-16T15:45:04Z 置信度 0.78 astro-ph.EP
• Reflected spectroscopy of small exoplanets III: probing the UV band to measure biosignature gasses
  Direct-imaging observations of terrestrial exoplanets will enable their atmospheric characterization and habitability assessment. Considering the Earth, the key atmospheric signatures for the biosphere is O$_2$ and the photochemical product O$_3$. However, thi…
  arxiv Mario Damiano, Renyu Hu, Bertrand Mennesson 2023-08-16T16:45:49Z 置信度 0.78 astro-ph.EPastro-ph.IM
• ATLAST detector needs for direct spectroscopic biosignature characterization in the visible and near-IR
  Are we alone? Answering this ageless question will be a major focus for astrophysics in coming decades. Our tools will include unprecedentedly large UV-Optical-IR space telescopes working with advanced coronagraphs and starshades. Yet, these facilities will no…
  arxiv Bernard J. Rauscher, Matthew R. Bolcar, Mark Clampin, Shawn D. Domagal-Goldman 等 2015-08-26T20:54:26Z 置信度 0.78 astro-ph.IM
• Life 2.0: A Scalable Distributed Space-Telescope Array for Biosignature Spectroscopy
  Answering the question "Are we alone?" requires atmospheric spectroscopy of nearby terrestrial planets. For an Earth--Sun analog, even the strongest transmission signals are expected to be of order 1 part per million (ppm). Unlike short-period planets, Earth 2…
  arxiv Jian Ge, Zhangqi Dang, Ziru Zhang, Chenxu Gao 等 2026-08-05T01:40:39Z 置信度 0.78 astro-ph.IM
• Detecting Earth-like Biosignatures on Rocky Exoplanets around Nearby Stars with Ground-based Extremely Large Telescopes
  As we begin to discover rocky planets in the habitable zone of nearby stars with missions like TESS and CHEOPS, we will need quick advancements on instrumentation and observational techniques that will enable us to answer key science questions, such as What ar…
  arxiv Mercedes López-Morales, Thayne Currie, Johanna Teske, Eric Gaidos 等 2019-03-22T14:21:28Z 置信度 0.78 astro-ph.EP
• New Insights into Cosmic Ray induced Biosignature Chemistry in Earth-like Atmospheres
  With the recent discoveries of terrestrial planets around active M-dwarfs, destruction processes masking the possible presence of life are receiving increased attention in the exoplanet community. We investigate potential biosignatures of planets having Earth-…
  arxiv Markus Scheucher, J. L. Grenfell, F. Wunderlich, M. Godolt 等 2018-08-07T13:16:40Z 置信度 0.78 astro-ph.EP
• Evaluating Habitability and Biosignature Detection on TOI-700 d: The Role of UV Environment and Atmospheric Pressure
  M dwarfs have long been prime targets in the search for habitable exoplanets, owing to their abundance in the galaxy and the relative ease of detecting Earth-sized worlds within their narrower habitable zones. Yet, these low-mass stars can emit high-energy rad…
  arxiv Viktor Y. D. Sumida, Raissa Estrela, Adriana Valio 2025-10-16T15:13:09Z 置信度 0.78 astro-ph.EP
• Detecting the proposed CH4-CO2 biosignature pair with the James Webb Space Telescope: TRAPPIST-1e and the effect of cloud/haze
  It is widely anticipated that the James Webb Space Telescope (JWST) will be transformative for exoplanet studies. It has even been suggested that JWST could provide the first opportunity to search for biosignatures in an alien atmosphere using transmission spe…
  arxiv Thomas Mikal-Evans 2021-11-18T13:43:26Z 置信度 0.78 astro-ph.EP
• The Detectability of Earth's Biosignatures Across Time
  Over the past two decades, enormous advances in the detection of exoplanets have taken place. Currently, we have discovered hundreds of earth-sized planets, several of them within the habitable zone of their star. In the coming years, the efforts will concentr…
  arxiv Enric Palle 2018-02-23T09:22:33Z 置信度 0.78 astro-ph.EP
• Quantifying the information impact of future searches for exoplanetary biosignatures
  One of the major goals for astronomy in the next decades is the remote search for biosignatures (i.e.\ the spectroscopic evidence of biological activity) in exoplanets. Here, we adopt a Bayesian statistical framework to discuss the implications of such future …
  arxiv Amedeo Balbi, Claudio Grimaldi 2020-08-17T19:31:04Z 置信度 0.78 astro-ph.EP
• Community Report from the Biosignatures Standards of Evidence Workshop
  The search for life beyond the Earth is the overarching goal of the NASA Astrobiology Program, and it underpins the science of missions that explore the environments of Solar System planets and exoplanets. However, the detection of extraterrestrial life, in ou…
  arxiv Victoria Meadows, Heather Graham, Victor Abrahamsson, Zach Adam 等 2022-10-25T19:33:17Z 置信度 0.78 astro-ph.IMastro-ph.EPq-bio.PE
• Vegetation's Red Edge: A Possible Spectroscopic Biosignature of Extraterrestrial Plants
  Earth's deciduous plants have a sharp order-of-magnitude increase in leaf reflectance between approximately 700 and 750 nm wavelength. This strong reflectance of Earth's vegetation suggests that surface biosignatures with sharp spectral features might be detec…
  arxiv Sara Seager, Edwin L. Turner, Justin Schafer, Eric B. Ford 2005-03-14T21:22:22Z 置信度 0.78 astro-ph
• Ultraviolet-Driven Atmospheric Degeneracies Challenge Conventional Biosignature Frameworks for Terrestrial Planets with Ultracool M Dwarf Hosts: An Archean-Analog TRAPPIST-1 e Case Study
  The ultraviolet (UV) spectrum of a host star strongly shapes the atmospheric composition and potential biosignatures of its planets. This relationship may be especially important for the planets orbiting TRAPPIST-1, an M8V star with substantially different pub…
  arxiv Evan L. Sneed, Edward W. Schwieterman, Sarah R. Peacock, Nicholas F. Wogan 等 2026-06-03T21:15:43Z 置信度 0.78 astro-ph.EPastro-ph.SR
• Impact of ηearth on the capabilities of affordable space missions to detect biosignatures on extrasolar planets
  We present an analytic model to estimate the capabilities of space missions dedicated to the search for biosignatures in the atmosphere of rocky planets located in the habitable zone of nearby stars. Relations between performance and mission parameters such as…
  arxiv Alain Leger, Denis Defrere, Fabien Malbet, Lucas Labadie 等 2015-04-30T13:53:19Z 置信度 0.78 astro-ph.IMastro-ph.EP
• Biosignatures from pre-oxygen photosynthesising life on TRAPPIST-1e
  In order to assess observational evidence for potential atmospheric biosignatures on exoplanets, it will be essential to test whether spectral fingerprints from multiple gases can be explained by abiotic or biotic-only processes. Here, we develop and apply a c…
  arxiv Jake K. Eager-Nash, Stuart J. Daines, James W. McDermott, Peter Andrews 等 2024-04-17T17:58:58Z 置信度 0.78 astro-ph.EP
• Biosignatures of the Earth I. Airborne spectropolarimetric detection of photosynthetic life
  Context. Homochirality is a generic and unique property of life on Earth and is considered a universal and agnostic biosignature. Homochirality induces fractional circular polarization in the incident light that it reflects. Because this circularly polarized l…
  arxiv C. H. Lucas Patty, Jonas G. Kühn, Petar H. Lambrev, Stefano Spadaccia 等 2021-06-01T13:53:57Z 置信度 0.78 astro-ph.EPastro-ph.IMphysics.bio-phq-bio.BM
• A Geologically Robust Procedure For Observing Rocky Exoplanets to Ensure that Detection of Atmospheric Oxygen is an Earth-Like Biosignature
  In the next decades, the astrobiological community will debate whether the first observations of oxygen in an exoplanet$'$s atmosphere signifies life, so it is critical to establish procedures now for collection and interpretation of such data. We present a st…
  arxiv Carey M. Lisse, Steven J. Desch, Cayman T. Unterborn, Stephen R. Kane 等 2020-06-12T18:19:26Z 置信度 0.78 astro-ph.EPastro-ph.IMastro-ph.SR
• Machine-assisted classification of potential biosignatures in earth-like exoplanets using low signal-to-noise ratio transmission spectra
  The search for atmospheric biosignatures in Earth-like exoplanets is one of the most pressing challenges in observational astrobiology. Detecting biogenic gases in terrestrial planets requires high-resolution observations and long integration times. In this wo…
  arxiv David S. Duque-Castaño, Jorge I. Zuluaga, Lauren Flor-Torres 2024-07-27T04:44:37Z 置信度 0.78 astro-ph.EPastro-ph.IM
• Issues with the High Definition Space Telescope (HDST) ExoEarth Biosignature Case: A Critique of the 2015 AURA Report "From Cosmic Birth to Living Earths: the future of UVOIR Astronomy"
  "From Cosmic Birth to Living Earths" advocates a 12-meter optical/near-IR space telescope for launch ~2035. The goal that sets this large size is the detection of biosignatures from Earth-like planets in their habitable zones around G-stars. The discovery of a…
  arxiv Martin Elvis 2015-09-25T17:30:37Z 置信度 0.78 astro-ph.EP
• Evaluating the Plausible Range of N2O Biosignatures on Exo-Earths: An Integrated Biogeochemical, Photochemical, and Spectral Modeling Approach
  Nitrous oxide (N2O) -- a product of microbial nitrogen metabolism -- is a compelling exoplanet biosignature gas with distinctive spectral features in the near- and mid-infrared, and only minor abiotic sources on Earth. Previous investigations of N2O as a biosi…
  arxiv Edward W. Schwieterman, Stephanie L. Olson, Daria Pidhorodetska, Christopher T. Reinhard 等 2022-10-04T15:18:33Z 置信度 0.78 astro-ph.EP
• The Role of Atmospheric Exchange in False-Positive Biosignature Detection
  Saturn's Moon Titan receives volatiles into the top of its atmosphere-including atomic oxygen-sourced from cryovolcanoes on Enceladus. Similar types of atmosphere exchange from one body to another, such as O2 and O3 sourced from TRAPPIST-1 d, could be introduc…
  arxiv Ryan C. Felton, Sandra T. Bastelberger, Kathleen E. Mandt, Adrienn Luspay-Kuti 等 2022-05-31T18:01:52Z 置信度 0.78 astro-ph.EP
• Biosignatures from Earth-Like Planets Around M Dwarfs
  Coupled one-dimensional photochemical-climate calculations have been performed for hypothetical Earth-like planets around M dwarfs. Visible, near-infrared and thermal-infrared synthetic spectra of these planets were generated to determine which biosignature ga…
  arxiv Antigona Segura, James F. Kasting, Victoria Meadows, Martin Cohen 等 2005-10-07T15:22:56Z 置信度 0.78 astro-ph
• Exploring molecular assembly as a biosignature using mass spectrometry and machine learning
  Molecular assembly offers a promising path to detect life beyond Earth, while minimizing assumptions based on terrestrial life. As mass spectrometers will be central to upcoming Solar System missions, predicting molecular assembly from their data without needi…
  arxiv Lindsay A. Rutter, Abhishek Sharma, Ian Seet, David Obeh Alobo 等 2025-07-25T08:19:15Z 置信度 0.78 cs.LG
• Onboard Science Instrument Autonomy for the Detection of Microscopy Biosignatures on the Ocean Worlds Life Surveyor
  The quest to find extraterrestrial life is a critical scientific endeavor with civilization-level implications. Icy moons in our solar system are promising targets for exploration because their liquid oceans make them potential habitats for microscopic life. H…
  arxiv Mark Wronkiewicz, Jake Lee, Lukas Mandrake, Jack Lightholder 等 2023-04-25T23:10:02Z 置信度 0.78 astro-ph.IMastro-ph.EPcs.AI
• 21st-Century Astrobiology Missions Should Seek These High-Confidence Biosignatures
  This white paper was submitted to NASA's Search For Life Science Analysis Group (SFL-SAG): To ensure that the first mission designed to seek signs of extant life since 1976 is able to produce an unambiguous biological interpretation, the SFL-SAG is tasked with…
  arxiv Christopher Temby, Jan Spacek 2025-08-02T17:58:09Z 置信度 0.78 astro-ph.IMastro-ph.EP
• Assessing Planetary Complexity and Potential Agnostic Biosignatures using Epsilon Machines
  We present a new approach to exoplanet characterisation using techniques from complexity science, with potential applications to biosignature detection. This agnostic method makes use of the temporal variability of light reflected or emitted from a planet. We …
  arxiv Stuart Bartlett, Jiazheng Li, Lixiang Gu, Lana Sinapayen 等 2022-02-08T07:53:13Z 置信度 0.78 astro-ph.EPnlin.CDphysics.data-an
• Detecting Biosignatures in the Atmospheres of Gas Dwarf Planets with the James Webb Space Telescope
  Exoplanets with radii between those of Earth and Neptune have stronger surface gravity than Earth, and can retain a sizable hydrogen-dominated atmosphere. In contrast to gas giant planets, we call these planets gas dwarf planets. The James Webb Space Telescope…
  arxiv Caprice Phillips, Ji Wang, Sarah Kendrew, Thomas P. Greene 等 2021-09-24T18:01:00Z 置信度 0.78 astro-ph.EP
• Detecting Land with Reflected Light Spectroscopy to Rule Out Waterworld O$_2$ Biosignature False Positives
  The search for life outside our solar system is at the forefront of modern astronomy, and telescopes such as the Habitable Worlds Observatory (HWO) are being designed to identify biosignatures. Molecular oxygen, O$_2$, is considered a promising indication of l…
  arxiv Anna Grace Ulses, Joshua Krissansen-Totton, Tyler D. Robinson, Victoria Meadows 等 2025-06-26T22:12:38Z 置信度 0.78 astro-ph.EP
• Elemental Stoichiometry as an Ecological Biosignature with Applications to Life Detection
  The vast chemical space of possible small molecules, estimated at 10^60 compounds for molecules composed of just C, N, O, and S, is only sparsely occupied by biology. We propose that where life selects molecules within this space constitutes a detectable ecolo…
  arxiv Pilar C. Vergeli, Cole Mathis, John F. Malloy, L. Felipe Benites 等 2026-05-19T01:49:35Z 置信度 0.78 q-bio.BMastro-ph.EPq-bio.MN
• The Futility of Exoplanet Biosignatures
  The ultimate goal of astrobiology is to determine the distribution and diversity of life in the universe. But as the word "biosignature" suggests, what will be detected is not life itself, but an observation implicating a particular process associated with liv…
  arxiv Harrison B. Smith, Cole Mathis 2022-05-16T18:11:44Z 置信度 0.78 astro-ph.EPastro-ph.IMq-bio.OT
• An Integrative Analysis of the Rich Planetary System of the Nearby Star e Eridani: Ideal Targets For Exoplanet Imaging and Biosignature Searches
  e Eridani, the fifth-closest Sun-like star, hosts at least three planets and could possibly harbor more. However, the veracity of the planet candidates in the system and its full planetary architecture remain unknown. Here we analyze the planetary architecture…
  arxiv Ritvik Basant, Jeremy Dietrich, Daniel Apai 2022-05-12T17:50:08Z 置信度 0.78 astro-ph.EPastro-ph.IM
• A New Method for Finding Nearby White Dwarf Exoplanets and Detecting Biosignatures
  We demonstrate that the James Webb Space Telescope (JWST) can detect infrared (IR) excess from the blended light spectral energy distribution of spatially unresolved terrestrial exoplanets orbiting nearby white dwarfs. We find that JWST is capable of detecting…
  arxiv Mary Anne Limbach, Andrew Vanderburg, Kevin B. Stevenson, Simon Blouin 等 2022-09-26T18:00:09Z 置信度 0.78 astro-ph.EPastro-ph.IMastro-ph.SR
• Influence of Biomass Emissions upon Habitability, Biosignatures and Detectability in Earth-like Atmospheres
  We investigate atmospheric responses of modeled hypothetical Earth-like planets in the habitable zone of the M-dwarf AD Leonis to reduced oxygen (O2), removed biomass (dead Earth), varying carbon dioxide (CO2) and surface relative humidity (sRH). Results sugge…
  arxiv Stefanie Gebauer, Iva Vilović, John Lee Grenfell, Fabian Wunderlich 等 2021-01-30T12:43:42Z 置信度 0.78 astro-ph.EPphysics.ao-ph
• Using Atomic and Molecular Data to Model Biosignature Abundances in Exoplanetary Atmospheres
  crossref Michael Rothman 2022-05-25T23:25:48Z 置信度 0.70
• Accelerating Transmission Spectroscopy of Exoplanets for Biosignature Detection Using Machine Learning
  The detection of biosignatures in exoplanet atmospheres through transmission spectroscopy is essential for assessing planetary habitability, yet traditional atmospheric retrieval techniques are computationally intensive and not well-suited for the large amount…
  crossref Sandhya Shanmuga-Nathan 2025-12-24T17:18:03Z 置信度 0.70
• One-Pot Two-Nanoprobe Assay Uncovers Targeted Glycoprotein Biosignature
  crossref 2020-04-07T06:48:06Z 置信度 0.70
• Quantum Coherence as a Potential Biosignature Framework: Applications to Mars and Exoplanetary Systems
  crossref Akın Soylemez 2025-12-23T16:12:52Z 置信度 0.70
• Collision Strengths and Line Ratios for PII as a Biosignature in Exoplanets
  crossref Kevin Hoy, Sultana Nahar, Anil Pradhan 2022-05-25T19:45:45Z 置信度 0.70
• Highly Altered Organic Matter on Earth: Biosignature Relevance
  crossref Beda A. Hofmann 2006-03-04T09:13:41Z 置信度 0.70
• Multi-Instrument Spectral Framework for Biosignature Detection in Enceladus' Plumes
  Active plume emissions from icy moons provide direct access to subsurface ocean material (Porco et al., 2006), enabling compositional characterisation of potentially habitable environments. This work develops a multi-instrument framework for organic compound d…
  crossref Madalena Nunes, Pedro Machado, Zita Martins 2026-07-02T16:32:44Z 置信度 0.70
• A Serum Small Molecule Biosignature of Radiation Exposure from Total Body Irradiated Patients
  crossref 2020-04-06T15:13:12Z 置信度 0.70
• Biosignature False Positives
  crossref Chester E. Harman, Shawn Domagal-Goldman 2018-11-02T18:45:06Z 置信度 0.70
• Why searching for extraterrestrial life with a universal biosignature detection framework is a mistake.
  crossref Carol Cleland 2022-01-19T18:41:08Z 置信度 0.70
• Biosignature hide and seek
  crossref John F. Cooper 2018-07-19T11:22:17Z 置信度 0.70
• Supplemental Material: A global database of Mars-relevant hydrovolcanic environments on Earth with potential biosignature preservation
  <div> Includes an expanded database with age, composition, setting, location, and structure name(s) for 45 volcanic fields; GIS data compatible with Esri ArcGIS Pro and Google Earth data of all 716 volcanic structures in database; map attribute table wit…
  crossref Catheryn H. Ryan, et al. 2023-12-14T17:59:13Z 置信度 0.70
• Diversity within organic assemblages as a biosignature
  The search for life in the Solar System hinges on measurements that planetary missions can return. Classical organic biosignatures, including molecular identity, isotopic composition, and chiral excess, require compound-specific resolution, high precision, and…
  crossref Gideon Yoffe, Fabian Klenner, Barak Sober, Yohai Kaspi 等 2026-07-02T16:32:44Z 置信度 0.70
• K3. Biosignature in oral squamous cell cancer
  crossref Tzu-Chen Yen 2011-07-23T06:30:07Z 置信度 0.70
• Planetary Scale Replication as an Agnostic Biosignature
  crossref Harrison B. Smith, Lana Sinapayen 2024-08-20T16:05:04Z 置信度 0.70
• Enhanced Resolution of Chiral Amino Acids with Capillary Electrophoresis for Biosignature Detection in Extraterrestrial Samples
  crossref 2020-04-07T16:42:38Z 置信度 0.70
• Optimization of Fluorescence Labeling of Trace Analytes: Application to Amino Acid Biosignature Detection with Pacific Blue
  crossref 2021-12-29T13:21:32Z 置信度 0.70
• Stability of Amino Acids in Different Physical States under Ray Irradiation and Implications for Mars Biosignature Detection
  crossref 2026-03-24T04:50:18Z 置信度 0.70
• Trace Element Partitioning as a Geochemical Biosignature of Biogenic Magnetite Formed by Iron-Reducing Bacteria
  Biogenic magnetite nanoparticles produced by microorganisms are ubiquitous in modern environments and are also thought to be abundant in ancient sediments such as banded iron formations and paleosols, given the early emergence of iron-metabolizing microbes. Ma…
  crossref Xiaohua Han, Wei Lin, Yongxin Pan 2026-03-13T23:03:52Z 置信度 0.70
• Towards biosignature detection on Icy Moons with ORIGIN
  In the search for life beyond Earth, the icy moons Europa and Enceladus have been brought forward as the most promising targets within our Solar System. Recently, the Enceladus Orbilander mission has gained significant interest as it has been selected as a NAS…
  crossref Nikita Jennifer Boeren, Peter Keresztes Schmidt, Marek Tulej, Peter Wurz 等 2024-03-09T03:12:10Z 置信度 0.70
• ATVB_net: Article Commentary: Platelet Activation and a Platelet Biosignature Are Associated With Cardiovascular Risk in Patients With Controlled Psoriasis
  crossref 2026-01-21T15:41:21Z 置信度 0.70
• Prototype Coherence-Based Biosignature Searches with Vera C Rubin Observatory Legacy Survey of Space and Time
  The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will deliver multiband time-domain photometry for an unprecedented number of sources (Ivezić et al. 2019), motivating a shift from single-feature anomaly detection toward structured biosignat…
  crossref Andjelka Kovacevic, Nigel Mason, Maia Moore 2026-07-02T16:32:44Z 置信度 0.70
• Spherulitic mineral growth: an unreliable biosignature but a great process indicator
  crossref P.H. Meister, S.E. Wolf 2026-02-09T23:03:59Z 置信度 0.70
• Iron-carbon interactions and size distribution in biogenic iron oxides as potential biosignature
  crossref Laura Tenelanda-Osorio, Muammar Mansor, Andreas Kappler 2023-12-11T11:28:26Z 置信度 0.70