High stellar FUV/NUV ratio and oxygen contents in the atmospheres of potentially habitable planets

Recent observations of several planet-hosting M dwarfs show that most have FUV/NUV flux ratios 1000 times greater than that of the Sun. Here we show that the atmospheric oxygen contents (O 2 and O 3 ) of potentially habitable planets in this type of UV environment could be 2-3 orders of magnitude gr...

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Autores principales:	Tian, F., France, K., Linsky, J.L., Mauas, P.J.D., Vieytes, M.C.
Formato:	JOUR
Materias:	Atmosphere photochemistry Biosignature Exoplanet Habitable planet Atmospheric oxygen Biosignatures Flux ratio Orders of magnitude Oxygen content Carbon dioxide Oxygen Photolysis Stars Planets atmospheric chemistry carbon dioxide oxygen photochemistry photolysis ultraviolet radiation
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_0012821X_v385_n_p22_Tian
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_0012821X_v385_n_p22_Tian
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spelling	todo:paper_0012821X_v385_n_p22_Tian2023-10-03T14:10:33Z High stellar FUV/NUV ratio and oxygen contents in the atmospheres of potentially habitable planets Tian, F. France, K. Linsky, J.L. Mauas, P.J.D. Vieytes, M.C. Atmosphere photochemistry Biosignature Exoplanet Habitable planet Atmospheric oxygen Biosignatures Exoplanet Flux ratio Orders of magnitude Oxygen content Carbon dioxide Oxygen Photolysis Stars Planets atmospheric chemistry carbon dioxide oxygen photochemistry photolysis ultraviolet radiation Recent observations of several planet-hosting M dwarfs show that most have FUV/NUV flux ratios 1000 times greater than that of the Sun. Here we show that the atmospheric oxygen contents (O 2 and O 3 ) of potentially habitable planets in this type of UV environment could be 2-3 orders of magnitude greater than those of their counterparts around Sun-like stars as a result of decreased photolysis of O 3 , H 2 O 2 , and HO 2 . Thus detectable levels of atmospheric oxygen, in combination with the existence of H 2 O and CO 2 , may not be the most promising biosignatures on planets around stars with high FUV/NUV ratios such as the observed M dwarfs. © 2013 Elsevier B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0012821X_v385_n_p22_Tian
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Atmosphere photochemistry Biosignature Exoplanet Habitable planet Atmospheric oxygen Biosignatures Exoplanet Flux ratio Orders of magnitude Oxygen content Carbon dioxide Oxygen Photolysis Stars Planets atmospheric chemistry carbon dioxide oxygen photochemistry photolysis ultraviolet radiation
spellingShingle	Atmosphere photochemistry Biosignature Exoplanet Habitable planet Atmospheric oxygen Biosignatures Exoplanet Flux ratio Orders of magnitude Oxygen content Carbon dioxide Oxygen Photolysis Stars Planets atmospheric chemistry carbon dioxide oxygen photochemistry photolysis ultraviolet radiation Tian, F. France, K. Linsky, J.L. Mauas, P.J.D. Vieytes, M.C. High stellar FUV/NUV ratio and oxygen contents in the atmospheres of potentially habitable planets
topic_facet	Atmosphere photochemistry Biosignature Exoplanet Habitable planet Atmospheric oxygen Biosignatures Exoplanet Flux ratio Orders of magnitude Oxygen content Carbon dioxide Oxygen Photolysis Stars Planets atmospheric chemistry carbon dioxide oxygen photochemistry photolysis ultraviolet radiation
description	Recent observations of several planet-hosting M dwarfs show that most have FUV/NUV flux ratios 1000 times greater than that of the Sun. Here we show that the atmospheric oxygen contents (O 2 and O 3 ) of potentially habitable planets in this type of UV environment could be 2-3 orders of magnitude greater than those of their counterparts around Sun-like stars as a result of decreased photolysis of O 3 , H 2 O 2 , and HO 2 . Thus detectable levels of atmospheric oxygen, in combination with the existence of H 2 O and CO 2 , may not be the most promising biosignatures on planets around stars with high FUV/NUV ratios such as the observed M dwarfs. © 2013 Elsevier B.V.
format	JOUR
author	Tian, F. France, K. Linsky, J.L. Mauas, P.J.D. Vieytes, M.C.
author_facet	Tian, F. France, K. Linsky, J.L. Mauas, P.J.D. Vieytes, M.C.
author_sort	Tian, F.
title	High stellar FUV/NUV ratio and oxygen contents in the atmospheres of potentially habitable planets
title_short	High stellar FUV/NUV ratio and oxygen contents in the atmospheres of potentially habitable planets
title_full	High stellar FUV/NUV ratio and oxygen contents in the atmospheres of potentially habitable planets
title_fullStr	High stellar FUV/NUV ratio and oxygen contents in the atmospheres of potentially habitable planets
title_full_unstemmed	High stellar FUV/NUV ratio and oxygen contents in the atmospheres of potentially habitable planets
title_sort	high stellar fuv/nuv ratio and oxygen contents in the atmospheres of potentially habitable planets
url	http://hdl.handle.net/20.500.12110/paper_0012821X_v385_n_p22_Tian
work_keys_str_mv	AT tianf highstellarfuvnuvratioandoxygencontentsintheatmospheresofpotentiallyhabitableplanets AT francek highstellarfuvnuvratioandoxygencontentsintheatmospheresofpotentiallyhabitableplanets AT linskyjl highstellarfuvnuvratioandoxygencontentsintheatmospheresofpotentiallyhabitableplanets AT mauaspjd highstellarfuvnuvratioandoxygencontentsintheatmospheresofpotentiallyhabitableplanets AT vieytesmc highstellarfuvnuvratioandoxygencontentsintheatmospheresofpotentiallyhabitableplanets
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High stellar FUV/NUV ratio and oxygen contents in the atmospheres of potentially habitable planets

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