abiotic oxygen
(oxygen from non-life sources)
Abiotic oxygen is elemental oxygen (e.g., O2)
from non-biological sources.
Oxygen gas is considered a biosignature,
but there are also chemical processes that can generate
it without the presence of living organisms,
such as chemical reactions that break down water.
When exoplanet atmospheres are analyzed
and oxygen is detected, the planet, its atmosphere's
composition, and the temperature may suggest
the oxygen is likely to be abiotic.
(chemistry)
Further reading:
https://en.wikipedia.org/wiki/Oxygen_cycle#Abiotic_production
https://en.wikipedia.org/wiki/Extraterrestrial_atmosphere#Abiotic_oxygen
https://ui.adsabs.harvard.edu/abs/2014ApJ...785L..20W/abstract
https://www.science20.com/news_articles/before_life_where_did_abiotic_oxygen_come_from-146242
https://www.gu.se/en/news/new-abiotic-pathway-for-the-formation-of-oxygen
https://ui.adsabs.harvard.edu/abs/2022SciA....8.5411W/abstract
https://ui.adsabs.harvard.edu/abs/2007A%26A...472..665S/abstract
https://ui.adsabs.harvard.edu/abs/2018ApJ...862...92K/abstract
Referenced by page:
biosignature
Index