Phosphine as a Biosignature Gas in Exoplanet Atmospheres.

@article{SousaSilva2019PhosphineAA,
  title={Phosphine as a Biosignature Gas in Exoplanet Atmospheres.},
  author={C. Sousa-Silva and S. Seager and S. Ranjan and J. J. Petkowski and Z. Zhan and R. Hu and W. Bains},
  journal={Astrobiology},
  year={2019}
}
A long-term goal of exoplanet studies is the identification and detection of biosignature gases. Beyond the most discussed biosignature gas O2, only a handful of gases have been considered in detail. In this study, we evaluate phosphine (PH3). On Earth, PH3 is associated with anaerobic ecosystems, and as such, it is a potential biosignature gas in anoxic exoplanets. We simulate the atmospheres of habitable terrestrial planets with CO2- and H2-dominated atmospheres and find that PH3 can… Expand
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