35 citations · 136 across the 7 of their papers we have counts for
5 papers · 1 filter
Fully fluorinated non-carbon compounds NF3 and SF6 as ideal technosignature gases
Sara Seager, Janusz J. Petkowski, Jingcheng Huang +3
Waste gas products from technological civilizations may accumulate in an exoplanet atmosphere to detectable levels. We propose nitrogen trifluoride (NF3) and sulfur hexafluoride (S…
Can Carbon Fractionation Provide Evidence for Aerial Biospheres in the Atmospheres of Temperate Sub-Neptunes?
Ana Glidden, Sara Seager, Jingcheng Huang +2
The search for signs of life on other worlds has largely focused on terrestrial planets. Recent work, however, argues that life could exist in the atmospheres of temperate sub-Nept…
Photochemical Runaway in Exoplanet Atmospheres: Implications for Biosignatures
Sukrit Ranjan, Sara Seager, Zhuchang Zhan +5
About 2.5 billion years ago, microbes learned to harness plentiful solar energy to reduce CO with HO, extracting energy and producing O as waste. O production from…
Assessment of Ammonia as a Biosignature Gas in Exoplanet Atmospheres
Jingcheng Huang, Sara Seager, Janusz J. Petkowski +2
Ammonia (NH3) in a terrestrial planet atmosphere is generally a good biosignature gas, primarily because terrestrial planets have no significant known abiotic NH3 source. The condi…
Assessment of Isoprene as a Possible Biosignature Gas in Exoplanets with Anoxic Atmospheres
Zhuchang Zhan, Sara Seager, Janusz Jurand Petkowski +4
Research for possible biosignature gases on habitable exoplanet atmosphere is accelerating. We add isoprene, C5H8, to the roster of biosignature gases. We found that formation of i…