Artículos de revistas
UV habitable zones around M stars
Fecha
2007-12Registro en:
Buccino, Andrea Paola; Lemarchand, Guillermo A.; Mauas, Pablo Jacobo David; UV habitable zones around M stars; Academic Press Inc Elsevier Science; Icarus; 192; 2; 12-2007; 582-587
0019-1035
CONICET Digital
CONICET
Autor
Buccino, Andrea Paola
Lemarchand, Guillermo A.
Mauas, Pablo Jacobo David
Resumen
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.