Searching for possible siblings of the sun from a common cluster based on stellar space velocities |
| |
Authors: | V V Bobylev A T Bajkova A Mylläri M Valtonen |
| |
Institution: | 1.Pulkovo Astronomical Observatory,Russian Academy of Sciences,St. Petersburg,Russia;2.Sobolev Astronomical Institute,St. Petersburg State University,Petrodvorets,Russia;3.Abo Akademi University,Turku,Finland;4.Helsinki Institute of Physics,Helsinki University,Helsinki,Finland |
| |
Abstract: | We propose a kinematic approach to searching for the stars that could be formed with the Sun in a common “parent” open cluster.
The approach consists in preselecting suitable candidates by the closeness of their space velocities to the solar velocity
and analyzing the parameters of their encounters with the solar orbit in the past in a time interval comparable to the lifetime
of stars. We consider stars from the Hipparcos catalog with available radial velocities. The Galactic orbits of stars have
been constructed in the Allen-Santillan potential by taking into account the perturbations from the spiral density wave. We
show that two stars, HIP 87382 and HIP 47399, are of considerable interest in our problem. Their orbits oscillate near the
solar orbit with an amplitude of ≈250 pc; there are short-term close encounters to distances <10 pc. Both stars have an evolutionary
status and metallicity similar to the solar ones. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|