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Exoplanet Biosignatures: A Review of Remotely Detectable Signs of Life.
Schwieterman, Edward W; Kiang, Nancy Y; Parenteau, Mary N; Harman, Chester E; DasSarma, Shiladitya; Fisher, Theresa M; Arney, Giada N; Hartnett, Hilairy E; Reinhard, Christopher T; Olson, Stephanie L; Meadows, Victoria S; Cockell, Charles S; Walker, Sara I; Grenfell, John Lee; Hegde, Siddharth; Rugheimer, Sarah; Hu, Renyu; Lyons, Timothy W.
Afiliación
  • Schwieterman EW; 1 Department of Earth Sciences, University of California , Riverside, California.
  • Kiang NY; 2 NASA Postdoctoral Program, Universities Space Research Association , Columbia, Maryland.
  • Parenteau MN; 3 NASA Astrobiology Institute , Virtual Planetary Laboratory Team, Seattle, Washington.
  • Harman CE; 4 NASA Astrobiology Institute , Alternative Earths Team, Riverside, California.
  • DasSarma S; 5 Blue Marble Space Institute of Science , Seattle, Washington.
  • Fisher TM; 3 NASA Astrobiology Institute , Virtual Planetary Laboratory Team, Seattle, Washington.
  • Arney GN; 6 NASA Goddard Institute for Space Studies , New York, New York.
  • Hartnett HE; 3 NASA Astrobiology Institute , Virtual Planetary Laboratory Team, Seattle, Washington.
  • Reinhard CT; 7 NASA Ames Research Center , Exobiology Branch, Mountain View, California.
  • Olson SL; 3 NASA Astrobiology Institute , Virtual Planetary Laboratory Team, Seattle, Washington.
  • Meadows VS; 6 NASA Goddard Institute for Space Studies , New York, New York.
  • Cockell CS; 8 Department of Applied Physics and Applied Mathematics, Columbia University , New York, New York.
  • Walker SI; 9 Department of Microbiology and Immunology, University of Maryland School of Medicine , Baltimore, Maryland.
  • Grenfell JL; 10 Institute of Marine and Environmental Technology, University System of Maryland , Baltimore, Maryland.
  • Hegde S; 11 School of Earth and Space Exploration, Arizona State University , Tempe, Arizona.
  • Rugheimer S; 3 NASA Astrobiology Institute , Virtual Planetary Laboratory Team, Seattle, Washington.
  • Hu R; 12 Planetary Systems Laboratory, NASA Goddard Space Flight Center , Greenbelt, Maryland.
  • Lyons TW; 11 School of Earth and Space Exploration, Arizona State University , Tempe, Arizona.
Astrobiology ; 18(6): 663-708, 2018 06.
Article en En | MEDLINE | ID: mdl-29727196
In the coming years and decades, advanced space- and ground-based observatories will allow an unprecedented opportunity to probe the atmospheres and surfaces of potentially habitable exoplanets for signatures of life. Life on Earth, through its gaseous products and reflectance and scattering properties, has left its fingerprint on the spectrum of our planet. Aided by the universality of the laws of physics and chemistry, we turn to Earth's biosphere, both in the present and through geologic time, for analog signatures that will aid in the search for life elsewhere. Considering the insights gained from modern and ancient Earth, and the broader array of hypothetical exoplanet possibilities, we have compiled a comprehensive overview of our current understanding of potential exoplanet biosignatures, including gaseous, surface, and temporal biosignatures. We additionally survey biogenic spectral features that are well known in the specialist literature but have not yet been robustly vetted in the context of exoplanet biosignatures. We briefly review advances in assessing biosignature plausibility, including novel methods for determining chemical disequilibrium from remotely obtainable data and assessment tools for determining the minimum biomass required to maintain short-lived biogenic gases as atmospheric signatures. We focus particularly on advances made since the seminal review by Des Marais et al. The purpose of this work is not to propose new biosignature strategies, a goal left to companion articles in this series, but to review the current literature, draw meaningful connections between seemingly disparate areas, and clear the way for a path forward. Key Words: Exoplanets-Biosignatures-Habitability markers-Photosynthesis-Planetary surfaces-Atmospheres-Spectroscopy-Cryptic biospheres-False positives. Astrobiology 18, 663-708.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Planetas / Exobiología / Medio Ambiente Extraterrestre / Origen de la Vida Tipo de estudio: Diagnostic_studies Idioma: En Revista: Astrobiology Asunto de la revista: BIOLOGIA Año: 2018 Tipo del documento: Article

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Planetas / Exobiología / Medio Ambiente Extraterrestre / Origen de la Vida Tipo de estudio: Diagnostic_studies Idioma: En Revista: Astrobiology Asunto de la revista: BIOLOGIA Año: 2018 Tipo del documento: Article