期刊
ASTROBIOLOGY
卷 18, 期 6, 页码 779-824出版社
MARY ANN LIEBERT, INC
DOI: 10.1089/ast.2017.1738
关键词
Exoplanets; Biosignatures; Life detection; Bayesian analysis
资金
- NASA Postdoctoral Program
- NASA Exobiology grant [NNX15AM07G, NNX15AL24G]
- NASA's Science Mission Directorate
- NASA [799608, NNX15AM07G, NNX15AL24G, 799655] Funding Source: Federal RePORTER
We introduce a Bayesian method for guiding future directions for detection of life on exoplanets. We describe empirical and theoretical work necessary to place constraints on the relevant likelihoods, including those emerging from better understanding stellar environment, planetary climate and geophysics, geochemical cycling, the universalities of physics and chemistry, the contingencies of evolutionary history, the properties of life as an emergent complex system, and the mechanisms driving the emergence of life. We provide examples for how the Bayesian formalism could guide future search strategies, including determining observations to prioritize or deciding between targeted searches or larger lower resolution surveys to generate ensemble statistics and address how a Bayesian methodology could constrain the prior probability of life with or without a positive detection. Key Words: ExoplanetsBiosignaturesLife detectionBayesian analysis. Astrobiology 18, 779-824.
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