THREE MODELS OF THE GRAVITATIONAL POTENTIAL OF THE MILKY WAY

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Abstract

The parameters of the axisymmetric model of the gravitational potential of the Galaxy have been refined. The basic curve of the Galaxy’s rotation in the distance interval R ∼ 0 – 190 kpc was constructed using the velocities of masers, classical Cepheids, Red Clump stars, Blue Horizontal Branch stars, halo stars, globular clusters, and dwarf satellite galaxies of the Milky Way. The rotation curve was selected in such a way that there would be no dominant burst of circular velocities in the central (R < 2 kpc) region of the Galaxy. As a result, two two-component models of the galactic potential were constructed, including contributions from the disk and halo of invisible matter, as well as a three-component model with a small-mass bulge added in advance. Such models can be useful in studying the long-term orbital evolution of stars, open and globular star clusters in the central (R < 4 kpc) region of the Galaxy. A self-consistency test of the constructed models was carried out by comparing their rotation curves with a set of model curves that were generated using the Illustris TNG50 software package.

About the authors

V. V. Bobylev

Central Astronomical Observatory of the Russian Academy of Sciences

Email: bob-v-vzz@rambler.ru
Pulkovo, Russia

A. T. Bajkova

Central Astronomical Observatory of the Russian Academy of Sciences

Pulkovo, Russia

A. A. Smirnov

Central Astronomical Observatory of the Russian Academy of Sciences

Pulkovo, Russia

References

  1. . Bhattacharjee, S. Chaudhury, and S. Kundu, 785(1), id. 63 (2014).
  2. Y. Huang, X.-W. Liu, H.-B. Yuan, M.-S. Xiang, et al., Monthly Not. Roy. Astron. Soc. 463(3), 2623 (2016).
  3. A.T. Bajkova and V.V. Bobylev, Open Astronomy 26(1), 72 (2017).
  4. I. Ablimit, G. Zhao, C. Flynn, and S.A. Bird, Letters 895(1), id. L12 (2020).
  5. Y. Jiao, F. Hammer, H. Wang, J. Wang, P. Amram, L. Chemin, and Y. Yang, Astron. and Astrophys. 678, id. A208 (2023).
  6. G.H. Hunter, M.C. Sormani, J.P. Beckmann, E. Vasiliev, et al., Astron. and Astrophys. 692, id. A216 (2024).
  7. D. Erkal, V. A. Belokurov, and D. L. Parkin, Monthly Not. Roy. Astron. Soc. 498, 5574 (2020).
  8. A. Kravtsov and S. Winney, Open J. Astrophys. 7, id. 50 (2024).
  9. А.Т. Байкова, В.В. Бобылев, Письма в Астрон. журн. 42(9), 625 (2016).
  10. А.Т. Байкова, В.В. Бобылев, А.О. Громов, Письма в Астрон. журн. 43(4), 275 (2017).
  11. W.B. Burton and M.A. Gordon, Astron. and Astrophys. 63, 7 (1978).
  12. D.P. Clemens, 295, 422 (1985).
  13. L. Chemin, F. Renaud, and C. Soubiran, Astron. and Astrophys. 578, id. A14 (2015).
  14. S.K. Kataria and M. Das, Monthly Not. Roy. Astron. Soc. 475(2), 1653 (2018).
  15. S. Khrapov, A. Khoperskov, and V. Korchagin, Galaxies 9, id. 29 (2021).
  16. P.J. McMillan, Monthly Not. Roy. Astron. Soc. 465, 76 (2017).
  17. E. Vasiliev, Monthly Not. Roy. Astron. Soc. 482, 1525 (2019).
  18. X. Ou, A.-C. Eilers, L. Necib, and A. Frebel, Monthly Not. Roy. Astron. Soc. 528, 693 (2024).
  19. M. Portail, O. Gerhard, C. Wegg, and M. Ness, Monthly Not. Roy. Astron. Soc. 465(2), 1621 (2017).
  20. Z. Li, J. Shen, O. Gerhard, and J.P. Clarke, 925(1), id. 71 (2022).
  21. M.J. Reid, K.M. Menten, A. Brunthaler, X.W. Zheng, et al., 885(2), id. 131 (2019).
  22. Y. Xu, S.B. Bian, M.J. Reid, J.J. Li, et al., Suppl. 253(1), id. 1 (2021).
  23. S.B. Bian, Y. Xu, J.J. Li, Y.W. Wu, et al., Astron. J. 163(2), id. 54 (2022).
  24. X. Mai, B. Zhang, M.J. Reid, L. Moscadelli, et al., 949(1), id. 10 (2023).
  25. G.N. Ortiz-León, S.A. Dzib, L. Loinard, Y. Gong, T. Pillai, and A. Plunkett, Astron. and Astrophys. 673, id. L1 (2023).
  26. J. Ordóñez-Toro, S.A. Dzib, L.T. Loinard, G. Ortiz-León, et al., Astron. J. 167(3), id. 108 (2024).
  27. D.M. Skowron, J. Skowron, P. Mróz, A. Udalski, et al., Science 365(6452), 478 (2019).
  28. A. Udalski, M.K. Szymaski, and G. Szymaski, Acta Astronomica 65(1), 1 (2015).
  29. I. Soszyski, A. Udalski, M.K. Szymaski, P. Pietrukowicz, et al., Acta Astronomica 70(2), 101 (2020).
  30. P. Pietrukowicz, I. Soszyski, and A. Udalski, Acta Astronomica 71(3), 205 (2021).
  31. D.M. Skowron, R. Drimmel, S. Khanna, A. Spagna, E. Poggio, and P. Ramos, Suppl. 278(2), id. 57 (2025).
  32. A. Vallenari, A.G.A. Brown, T. Prusti, J.H.J. de Bruijne, et al., Astron. and Astrophys. 674, id. A1 (2023).
  33. V.V. Bobylev and A.T. Bajkova, Res. Astron. and Astrophys. 23(4), id. 045001 (2023).
  34. A.G.A. Brown, A. Vallenari, T. Prusti, J.H.J. de Bruijne, et al., Astron. and Astrophys. 649, id. A1 (2021).
  35. P. Mróz, A. Udalski, D.M. Skowron, J. Skowron, et al., Letters 870(1), id. L10 (2019).
  36. A.G.A. Brown, A. Vallenari, T. Prusti, J.H.J. de Bruijne, et al., Astron. and Astrophys. 616, id. A1 (2018).
  37. Y. Zhou, X. Li, Y. Huang, and H. Zhang, 946(2), id. 73 (2023).
  38. S.R. Majewski, R.P. Schiavon, P.M. Frinchaboy, C. Allende Prieto, et al., 154(3), id. 94 (2017).
  39. A.-Li Luo, H.-T. Zhang, Y.-H. Zhao, G. Zhao, et al., Res. Astron. and Astrophys. 12(9), 1243 (2012).
  40. L.-C. Deng, H.J. Newberg, C. Liu, J.L. Carlin, et al., Res. Astron. and Astrophys. 12(7), 735 (2012).
  41. J. Binney and S. Tremaine, Galactic Dynamics, Second Edition, (Princeton, NJ USA: Princeton University Press, 2008).
  42. S. Põder, M. Benito, J. Pata, R. Kipper, H. Ramler, G. Hütsi, I. Kolka, and G.F. Thomas, Astron. and Astrophys. 676, id. A134 (2023).
  43. O. Koop, T. Antoja, A. Helmi, T.M. Callingham, and C.F.P. Laporte, Astron. and Astrophys. 692, id. A50 (2024).
  44. R. Schönrich, J. Binney, and W. Dehnen, Monthly Not. Roy. Astron. Soc. 403(4), 1829 (2010).
  45. A.-C. Eilers, D.W. Hogg, H.-W. Rix, and M.K. Ness, Astrophys. J. 871(1), id. 120 (2019).
  46. В.В. Бобылев, А.Т. Байкова, Астрон. журн. 98(6), 497 (2021).
  47. J. Holmberg and C. Flynn, Monthly Not. Roy. Astron. Soc. 352, 440 (2004).
  48. D. Horta, A.M. Price-Whelan, D.W. Hogg, K.V. Johnston, L. Widrow, J.J. Dalcanton, M.K. Ness, and J.A.S. Hunt, Astrophys. J. 962(2), id. 165 (2024).
  49. H.C. Plummer, Monthly Not. Roy. Astron. Soc. 71, 460 (1911).
  50. M. Miyamoto and R. Nagai, Publ. Astron. Soc. Japan 27, 533 (1975).
  51. J.F. Navarro, C.S. Frenk, and S.D.M. White, Astrophys. J. 490, 493 (1997).
  52. A. Irrgang, B. Wilcox, E. Tucker, and L. Schiefelbein, Astron. and Astrophys. 549, id. A137 (2013).
  53. В.В. Бобылев, А.Т. Байкова, Астрон. журн. 100(8), 708 (2023).
  54. M. Portail, C. Wegg, O. Gerhard, and I. Martinez-Valpuesta, Monthly Not. Roy. Astron. Soc. 448(1), 713 (2015).
  55. E. Vasiliev, V. Belokurov, and D. Erkal, Monthly Not. Roy. Astron. Soc. 501, 2279 (2021).
  56. S.E. Koposov, D. Erkal, T.S. Li, G.S. Da Costa, et al., Monthly Not. Roy. Astron. Soc. 521(4), 4936 (2023).
  57. P F. de Salas, K. Malhan, K. Freese, K. Hattori, and M. Valluri, J. Cosmology and Astroparticle Phys. 10, id. 037 (2019).
  58. X. Ou, A.-C. Eilers, L. Necib, and A. Frebel, Monthly Not. Roy. Astron. Soc. 528(1), 693 (2024).
  59. G.H. Hunter, M.C. Sormani, J.P. Beckmann, E. Vasiliev, et al., Astron. and Astrophys. 692, id. A216 (2024).
  60. A. Pillepich, D. Nelson, V. Springel, R. Pakmor, et al., Monthly Not. Roy. Astron. Soc. 490(3), 3196 (2019).
  61. A. Pillepich, D. Sotillo-Ramos, R. Ramesh, D. Nelson, et al., Monthly Not. Roy. Astron. Soc. 535(2), 1721 (2024).
  62. E. Vasiliev, Monthly Not. Roy. Astron. Soc. 484(2), 2832 (2019).

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