2007A&A...476.1365V


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.19CEST00:02:28

2007A&A...476.1365V - Astronomy and Astrophysics, volume 476, 1365-1371 (2007/12-4)

The habitability of super-Earths in Gliese 581.

VON BLOH W., BOUNAMA C., CUNTZ M. and FRANCK S.

Abstract (from CDS):

The planetary system around the M star Gliese 581 consists of a hot Neptune (Gl 581b) and two super-Earths (Gl 581c and Gl 581d). The habitability of this system with respect to the super-Earths is investigated following a concept that studies the long-term possibility of photosynthetic biomass production on a dynamically active planet. A thermal evolution model for a super-Earth is used to calculate the sources and sinks of atmospheric carbon dioxide. The habitable zone is determined by the limits of photosynthetic life on the planetary surface. Models with different ratios of land/ocean coverage are investigated. The super-Earth Gl 581c is clearly outside the habitable zone, since it is too close to the star. In contrast, Gl 581d is a tidally locked habitable super-Earth near the outer edge of the habitable zone. Despite the adverse conditions on this planet, at least some primitive forms of life may be able to exist on its surface. Therefore, Gl 581d is an interesting target for the planned TPF/Darwin missions to search for biomarkers in planetary atmospheres.

Abstract Copyright:

Journal keyword(s): stars: individual: Gl 581 - stars: planetary systems - astrobiology

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * 47 UMa PM* 10 59 27.9738644892 +40 25 48.922388918   5.66   4.7   G1-VFe-0.5 727 1
2 BD-07 4003c Pl 15 19 26.8271336166 -07 43 20.190958776           ~ 99 1
3 BD-07 4003d Pl 15 19 26.8271336166 -07 43 20.190958776           ~ 139 1
4 BD-07 4003b Pl 15 19 26.8271336166 -07 43 20.190958776           ~ 75 1
5 BD-07 4003 BY* 15 19 26.8271336166 -07 43 20.190958776 13.403 11.76 10.560 9.461 8.911 M3V 552 2

    Equat.    Gal    SGal    Ecl

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2021.04.19-00:02:28

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