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Circumstellar Habitable Zones of Binary Star Systems in the Solar Neighborhood | | Siegfried Eggl
; Elke Pilat-Lohinger
; Barbara Funk
; Nikolaos Georgakarakos
; Nader Haghighipour
; | | Date: |
19 Oct 2012 | | Abstract: | Binary and multiple systems constitute more than half of the total stellar
population in the Solar neighborhood (Kiseleva-Eggleton and Eggleton 2001).
Their frequent occurrence as well as the fact that more than 70 (Schneider et
al. 2011) planets have already been discovered in such configurations - most
noteably the telluric companion of alpha Centauri B (Dumusque et al. 2012) -
make them interesting targets in the search for habitable worlds. Recent
studies (Eggl et al. 2012b, Forgan 2012) have shown, that despite the
variations in gravitational and radiative environment, there are indeed
circumstellar regions where planets can stay within habitable insolation limits
on secular dynamical timescales. In this article we provide habitable zones for
19 near S-Type binary systems from the Hipparchos and WDS catalogues with
semimajor axes between 1 and 100 AU. Hereby, we accounted for the combined
dynamical and radiative influence of the second star on the Earth-like planet.
Out of the 19 systems presented, 17 offer dynamically stable habitable zones
around at least one component. The 17 potentially habitable systems contain 5
F, 3 G, 7 K and 16 M class stars. As their proximity to the Solar System (d <
31 pc) makes the selected binary stars exquisite targets for observational
campaigns, we offer estimates on radial velocity, astrometric and transit
signatures produced by habitable Earth-like planets in eccentric circumstellar
orbits. | | Source: | arXiv, 1210.5411 | | Services: | Forum | Review | PDF | Favorites | |
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