Estimates of the kinematic age of the $β$ Pictoris moving group from up-to-date data
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866916288579764224 |
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| author | Bobylev, Vadim Bajkova, Anisa |
| author_facet | Bobylev, Vadim Bajkova, Anisa |
| contents | The kinematics of about 40 single stars belonging to the $β$ Pictoris moving group is studied. The age of the $β$ Pictoris moving group is estimated from these stars with ground-based line-of-sight velocity determinations by two methods. Both estimates are kinematic. In the first method we considered the traceback trajectories of the stars, giving an estimate of $t=13.2\pm1.4$ Myr. In the second method, by analyzing the instantaneous velocities of the stars, we show that there is an expansion of the stellar system occurring in the Galactic $xy$ plane. Based on this effect, we find the time interval elapsed from the beginning of the expansion of the $β$ Pictoris moving group to the present day, $t=20\pm2$ Myr. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_10374 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Estimates of the kinematic age of the $β$ Pictoris moving group from up-to-date data Bobylev, Vadim Bajkova, Anisa Astrophysics of Galaxies The kinematics of about 40 single stars belonging to the $β$ Pictoris moving group is studied. The age of the $β$ Pictoris moving group is estimated from these stars with ground-based line-of-sight velocity determinations by two methods. Both estimates are kinematic. In the first method we considered the traceback trajectories of the stars, giving an estimate of $t=13.2\pm1.4$ Myr. In the second method, by analyzing the instantaneous velocities of the stars, we show that there is an expansion of the stellar system occurring in the Galactic $xy$ plane. Based on this effect, we find the time interval elapsed from the beginning of the expansion of the $β$ Pictoris moving group to the present day, $t=20\pm2$ Myr. |
| title | Estimates of the kinematic age of the $β$ Pictoris moving group from up-to-date data |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2406.10374 |