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Proceedings Paper

Baseline requirements for detecting biosignatures with the HabEx and LUVOIR mission concepts
Author(s): Ji Wang; Dimitri Mawet; Garreth Ruane; Jacques-Robert Delorme; Nikita Klimovich; Renyu Hu
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Paper 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, H2O, O2, CH4, and CO2. 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 O2 and H2O 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

Paper Details

Date Published: 1 September 2017
PDF: 9 pages
Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 104000Z (1 September 2017); doi: 10.1117/12.2275222
Show Author Affiliations
Ji Wang, California Institute of Technology (United States)
Dimitri Mawet, California Institute of Technology (United States)
Jet Propulsion Lab. (United States)
Garreth Ruane, California Institute of Technology (United States)
Jacques-Robert Delorme, California Institute of Technology (United States)
Nikita Klimovich, California Institute of Technology (United States)
Renyu Hu, Jet Propulsion Lab. (United States)
California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 10400:
Techniques and Instrumentation for Detection of Exoplanets VIII
Stuart Shaklan, Editor(s)

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