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Abstract:

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.

Registro:

Documento: Artículo
Título:High stellar FUV/NUV ratio and oxygen contents in the atmospheres of potentially habitable planets
Autor:Tian, F.; France, K.; Linsky, J.L.; Mauas, P.J.D.; Vieytes, M.C.
Filiación:National Astronomical Observatories of China, Beijing, China
Center for Earth System Sciences, Tsinghua University, Beijing, 100084, China
Center for Astrophysics and Space Astronomy, University of Colorado, 389 UCB, Boulder, CO 80309, United States
JILA, University of Colorado and NIST, 440 UCB, Boulder, CO 80309-0440, United States
Instituto de Astronomía y Física del Espacio (CONICET-UBA), CC. 67 Suc. 28 (1428), Buenos Aires, Argentina
Palabras clave: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
Año:2014
Volumen:385
Página de inicio:22
Página de fin:27
DOI: http://dx.doi.org/10.1016/j.epsl.2013.10.024
Título revista:Earth and Planetary Science Letters
Título revista abreviado:Earth Plan. Sci. Lett.
ISSN:0012821X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0012821X_v385_n_p22_Tian

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Citas:

---------- APA ----------
Tian, F., France, K., Linsky, J.L., Mauas, P.J.D. & Vieytes, M.C. (2014) . High stellar FUV/NUV ratio and oxygen contents in the atmospheres of potentially habitable planets. Earth and Planetary Science Letters, 385, 22-27.
http://dx.doi.org/10.1016/j.epsl.2013.10.024
---------- CHICAGO ----------
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" . Earth and Planetary Science Letters 385 (2014) : 22-27.
http://dx.doi.org/10.1016/j.epsl.2013.10.024
---------- MLA ----------
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" . Earth and Planetary Science Letters, vol. 385, 2014, pp. 22-27.
http://dx.doi.org/10.1016/j.epsl.2013.10.024
---------- VANCOUVER ----------
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. Earth Plan. Sci. Lett. 2014;385:22-27.
http://dx.doi.org/10.1016/j.epsl.2013.10.024