Kinematics of stars with radially elongated orbits located within 100 pc from the sun

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Рұқсат ақылы немесе тек жазылушылар үшін

Аннотация

Using numerical modeling, we studied the motion of stars whose spatial velocities have radial directions of motion in the galactic disk. For this purpose, stars located within 100 pc from the Sun with spatial velocities directed approximately to the galactic Center (or anticenter) were selected from the Gaia DR3 catalog. The sample included 13 stars with characteristics of halo stars: the eccentricities of their spatial orbits are close to unity and metallicity is significantly less than zero. An axisymmetric model of the Galaxy, including the bulge, disk, and halo, was used. It was found that the orbital apsides of the stars in our sample show a retrogradely directed precession with a velocity of 15–20 pc/million years in the interval from 10 to 20 kpc from the CG.

Авторлар туралы

E. Postnikova

Institute of Astronomy of the Russian Academy of Sciences

Email: svvs@ya.ru
Moscow, Russia

N. Chupina

Institute of Astronomy of the Russian Academy of Sciences

Email: svvs@ya.ru
Moscow, Russia

S. Vereshchagin

Institute of Astronomy of the Russian Academy of Sciences

Хат алмасуға жауапты Автор.
Email: svvs@ya.ru
Moscow, Russia

Әдебиет тізімі

  1. N.D. Utkin, A.K. Dambis, A.S. Rastorguev, A.D. Klinchev, I. Ablimit, and G. Zhao, Astron. Lett. 44, 688 (2018).
  2. H. Tian, C. Liu, Y. Xu, and X. Xue, Astrophys. J. 871, 184, 1805.08326 (2019).
  3. G. Iorio and V. Belokurov, Monthly Not. Roy. Astron. Soc. 502, 5686, 2008.02280 (2021).
  4. D. Carollo, T.C. Beers, Y.S. Lee, M. Chiba, et al., Nature 450, 1020, 0706.3005 (2007).
  5. G. Liu, Y. Huang, S.A. Bird, H. Zhang, et al., Monthly Not. Roy. Astron. Soc. 517, 2787, 2209.07885 (2022).
  6. Р.В. Ткаченко, А.П. Брындина, А.Б. Жмайлова, В.И. Корчагин, Астрон. журн., 2024, в печати.
  7. N. Tahir, F. De Paolis, A. Qadir, A.A. Nucita, Achille Symmetry 15, 1, id. 160 (2023).
  8. Gaia Collaboration; Smart, R. L. et al. Gaia Early Data Release 3. The Gaia Catalogue of Nearby Stars Astronomy & Astrophysics 649, id. A6, 44 (2021), https://vizier.cds.unistra.fr/viz-bin/VizieR-3?-source=J/A%2bA/649/A6/table1c Gaia Catalogue of Nearby Stars — GCNS (Gaia collaboration, 2021).
  9. R. Schönrich, J. Binney, W. Dehnen, Monthly Not. Roy. Astron. Soc. 403, 1829 (2010).
  10. M. Miyamoto, R. Nagai, Publ. Astron. Soc. Japan 27, 533 (1975).
  11. J.F. Navarro, C.S. Frenk, S. D.M. White, Monthly Not. Roy. Astron. Soc. 275, 56 (1995).
  12. R. Abuter, et al. Astron. and Astrophys. 657, id. L12 (2022).
  13. M.J. Reid & A. Brunthaler, Astrophys. J. 892, 1, id. 39 (2020).
  14. A.C. Robin, O. Bienaymé, J.B. Salomon et al., Astron. and Astrophys. 667, 98 (2022).
  15. J. Bovy, Astrophys. J. Supl. Ser. 216, 29 (2015).

Қосымша файлдар

Қосымша файлдар
Әрекет
1. JATS XML
Жүктеу

© Russian Academy of Sciences, 2025