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Exoplanet biosignatures: a review of remotely detectable signs of life

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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.

In: Astrobiology, Vol. First Online, 04.05.2018.

Research output: Contribution to journalReview articlepeer-review

Harvard

Schwieterman, EW, Kiang, NY, Parenteau, MN, Harman, CE, DasSarma, S, Fisher, TM, Arney, GN, Hartnett, HE, Reinhard, CT, Olson, SL, Meadows, VS, Cockell, CS, Walker, SI, Grenfell, JL, Hegde, S, Rugheimer, S, Hu, R & Lyons, TW 2018, 'Exoplanet biosignatures: a review of remotely detectable signs of life', Astrobiology, vol. First Online. https://doi.org/10.1089/ast.2017.1729

APA

Schwieterman, E. W., Kiang, N. Y., Parenteau, M. N., Harman, C. E., DasSarma, S., Fisher, T. M., Arney, G. N., Hartnett, H. E., Reinhard, C. T., Olson, S. L., Meadows, V. S., Cockell, C. S., Walker, S. I., Grenfell, J. L., Hegde, S., Rugheimer, S., Hu, R., & Lyons, T. W. (2018). Exoplanet biosignatures: a review of remotely detectable signs of life. Astrobiology, First Online. https://doi.org/10.1089/ast.2017.1729

Vancouver

Schwieterman EW, Kiang NY, Parenteau MN, Harman CE, DasSarma S, Fisher TM et al. Exoplanet biosignatures: a review of remotely detectable signs of life. Astrobiology. 2018 May 4;First Online. https://doi.org/10.1089/ast.2017.1729

Author

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. / Exoplanet biosignatures : a review of remotely detectable signs of life. In: Astrobiology. 2018 ; Vol. First Online.

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@article{c834aaa9e4eb48a2b599ca6fdb8a0553,
title = "Exoplanet biosignatures: a review of remotely detectable signs of life",
abstract = "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.",
keywords = "Exoplanets, Biosignatures, Habitability markers, Photosynthesis, Planetary surfaces, Atmospheres, Spectroscopy, Cryptic biospheres, False positives",
author = "Schwieterman, {Edward W.} and Kiang, {Nancy Y.} and Parenteau, {Mary N.} and Harman, {Chester E.} and Shiladitya DasSarma and Fisher, {Theresa M.} and Arney, {Giada N.} and Hartnett, {Hilairy E.} and Reinhard, {Christopher T.} and Olson, {Stephanie L.} and Meadows, {Victoria S.} and Cockell, {Charles S.} and Walker, {Sara I.} and Grenfell, {John Lee} and Siddharth Hegde and Sarah Rugheimer and Renyu Hu and Lyons, {Timothy W.}",
year = "2018",
month = may,
day = "4",
doi = "10.1089/ast.2017.1729",
language = "English",
volume = "First Online",
journal = "Astrobiology",
issn = "1531-1074",
publisher = "Mary Ann Liebert Inc.",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Exoplanet biosignatures

T2 - a review of remotely detectable signs of life

AU - Schwieterman, Edward W.

AU - Kiang, Nancy Y.

AU - Parenteau, Mary N.

AU - Harman, Chester E.

AU - DasSarma, Shiladitya

AU - Fisher, Theresa M.

AU - Arney, Giada N.

AU - Hartnett, Hilairy E.

AU - Reinhard, Christopher T.

AU - Olson, Stephanie L.

AU - Meadows, Victoria S.

AU - Cockell, Charles S.

AU - Walker, Sara I.

AU - Grenfell, John Lee

AU - Hegde, Siddharth

AU - Rugheimer, Sarah

AU - Hu, Renyu

AU - Lyons, Timothy W.

PY - 2018/5/4

Y1 - 2018/5/4

N2 - 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.

AB - 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.

KW - Exoplanets

KW - Biosignatures

KW - Habitability markers

KW - Photosynthesis

KW - Planetary surfaces

KW - Atmospheres

KW - Spectroscopy

KW - Cryptic biospheres

KW - False positives

U2 - 10.1089/ast.2017.1729

DO - 10.1089/ast.2017.1729

M3 - Review article

VL - First Online

JO - Astrobiology

JF - Astrobiology

SN - 1531-1074

ER -

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