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Abstract:

During the last decade there was a change in paradigm, which led to consider that terrestrial-type planets within liquid-water habitable zones (LW-HZ) around M stars can also be suitable places for the emergence and evolution of life. Since many dMe stars emit large amount of UV radiation during flares, in this work we analyze the UV constrains for living systems on Earth-like planets around dM stars. We apply our model of UV habitable zone (UV-HZ; Buccino, A.P., Lemarchand, G.A., Mauas, P.J.D., 2006. Icarus 183, 491-503) to the three planetary systems around dM stars (HIP 74995, HIP 109388 and HIP 113020) observed by IUE and to two M-flare stars (AD Leo and EV Lac). In particular, HIP 74995 hosts a terrestrial planet in the LW-HZ, which is the exoplanet that most resembles our own Earth. We show, in general, that during the quiescent state there would not be enough UV radiation within the LW-HZ to trigger the biogenic processes and that this energy could be provided by flares of moderate intensity, while strong flares do not necessarily rule-out the possibility of life-bearing planets. © 2007 Elsevier Inc. All rights reserved.

Registro:

Documento: Artículo
Título:UV habitable zones around M stars
Autor:Buccino, A.P.; Lemarchand, G.A.; Mauas, P.J.D.
Filiación:Instituto de Astronomía y Física del Espacio (CONICET), C.C. 67, Sucursal 28, C1428EHA Buenos Aires, Argentina
Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, C.C. 8, Sucursal 25, C1425FFJ Buenos Aires, Argentina
Instituto Argentino de Radioastronomía (CONICET), C.C. 5, Villa Elisa, 1894 Buenos Aires, Argentina
Palabras clave:Exobiology; Extrasolar planets; Prebiotic environments; Ultraviolet observations
Año:2007
Volumen:192
Número:2
Página de inicio:582
Página de fin:587
DOI: http://dx.doi.org/10.1016/j.icarus.2007.08.012
Título revista:Icarus
Título revista abreviado:Icarus
ISSN:00191035
CODEN:ICRSA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00191035_v192_n2_p582_Buccino

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Citas:

---------- APA ----------
Buccino, A.P., Lemarchand, G.A. & Mauas, P.J.D. (2007) . UV habitable zones around M stars. Icarus, 192(2), 582-587.
http://dx.doi.org/10.1016/j.icarus.2007.08.012
---------- CHICAGO ----------
Buccino, A.P., Lemarchand, G.A., Mauas, P.J.D. "UV habitable zones around M stars" . Icarus 192, no. 2 (2007) : 582-587.
http://dx.doi.org/10.1016/j.icarus.2007.08.012
---------- MLA ----------
Buccino, A.P., Lemarchand, G.A., Mauas, P.J.D. "UV habitable zones around M stars" . Icarus, vol. 192, no. 2, 2007, pp. 582-587.
http://dx.doi.org/10.1016/j.icarus.2007.08.012
---------- VANCOUVER ----------
Buccino, A.P., Lemarchand, G.A., Mauas, P.J.D. UV habitable zones around M stars. Icarus. 2007;192(2):582-587.
http://dx.doi.org/10.1016/j.icarus.2007.08.012