Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21922802v&link_type=abstract
American Astronomical Society, AAS Meeting #219, #228.02
Astronomy and Astrophysics
Astronomy
Scientific paper
We search for solar siblings, the stars that could have formed with the Sun in a common "parent" open cluster. We select suitable candidates by the closeness of their space velocities to the solar velocity and analyze the parameters of their encounters with the Sun in the past 5 billion years. We consider stars with known 3D velocities and show that two stars, HIP 87382 and HIP 47399, are of considerable interest . Their orbits oscillate near the solar orbit with an amplitude of about 250 pc; there are short-term close encounters at distances <10 pc. Both stars have an evolutionary status and metallicity similar to the solar metallicity. It is possible that spores of life have been exchanged between our Solar system and the possible planetary systems of these stars. We recommend that these stars are included among special targets for search of Earth-class planets and for life in exoplanetary systems.
Bajkova Anisa
Bobylev Vadim V.
Myllari Aleksandr
Valtonen Mauri J.
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