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Baseline requirements for detecting biosignatures with the HabEx and LUVOIR mission concepts

Wang, Ji and Mawet, Dimitri and Ruane, Garreth and Delorme, Jacques-Robert and Klimovich, Nikita S. and Hu, Renyu (2017) Baseline requirements for detecting biosignatures with the HabEx and LUVOIR mission concepts. In: Techniques and Instrumentation for Detection of Exoplanets VIII. Proceedings of SPIE. No.10400. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 104000Z. ISBN 9781510612570. https://resolver.caltech.edu/CaltechAUTHORS:20180216-134344780

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Abstract

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 goal. We investigate the baseline requirements for detecting four molecular species, H_2O, O_2, CH_4, and CO_2. These molecules are highly relevant to habitability and life activity on Earth and other planets. Through numerical simulations, we find the minimum requirement for spectral resolution (R) and starlight suppression level (C) for a given exposure time. We consider scenarios in which different molecules are detected. For example, R = 6400 (400) and C = 5 × 10^(−10) (2 × 10^(−9)) are required for HabEx (LUVOIR) to detect O_2 and H_2O for an exposure time of 400 hours for an Earth analog around a solar-type star at a distance of 5 pc. The full results are given in Table 2. The impact of exo-zodiacal contamination and thermal background is also discussed.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2275222DOIArticle
https://arxiv.org/abs/1806.04324arXivDiscussion Paper
ORCID:
AuthorORCID
Mawet, Dimitri0000-0002-8895-4735
Ruane, Garreth0000-0003-4769-1665
Hu, Renyu0000-0003-2215-8485
Additional Information:© 2017 SPIE. We would like to thank Rowan Swain for proofreading the manuscript.
Subject Keywords:HabEx, LUVOIR, Biosignature, Life, High Dispersion Coronagraphy
Series Name:Proceedings of SPIE
Issue or Number:10400
Record Number:CaltechAUTHORS:20180216-134344780
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180216-134344780
Official Citation:Ji Wang, Dimitri Mawet, Garreth Ruane, Jacques-Robert Delorme, Nikita Klimovich, Renyu Hu, "Baseline requirements for detecting biosignatures with the HabEx and LUVOIR mission concepts", Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 104000Z (1 September 2017); doi: 10.1117/12.2275222; https://doi.org/10.1117/12.2275222
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84870
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:20 Feb 2018 21:57
Last Modified:03 Oct 2019 19:23

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