Skip to main content
SpringerLink
Log in

A dynamical model of the Galaxy

  • Published:
Astronomy Reports Aims and scope Submit manuscript

Abstract

A series of dynamical models of the Galaxy is constructed assuming that the entire disk is near the gravitational-stability limit. This imposes constraints on the dynamical and kinematic parameters of the main subsystems (the disk, bulge, and halo). The disk surface density in the solar neighborhood should not exceed 58 M ⊙/pc2. Further, we find that the observed local decrease in the rotational velocity at 6 kpc ≲ r ≲ 10 kpc is not associated with details of the radial distribution of matter in the Galaxy and instead results from dynamical processes or some other factors responsible for noncircular motions. It follows from the presence of a long-lived bar and the observed distribution of the stellar-velocity dispersion that the central maximum in the rotation curve at radius r ⋍ 300 pc cannot be associated with a very concentrated bulge core. The best agreement between the observational data and the parameters of the dynamical models is achieved for a radial disk scale length of L ⋍ 3 kpc. The relative contribution of the disk to the circular rotational velocity at r = 2.2L is 73%.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. D. P. Clemens, Astrophys. J. 295, 422 (1985).

    Article  ADS  Google Scholar 

  2. J. R. Lewis and K. C. Freeman, Astron. J. 97, 139 (1989).

    Article  ADS  Google Scholar 

  3. J. Brand and L. Blitz, Astron. Astrophys. 275, 67 (1993).

    ADS  Google Scholar 

  4. Y. Sofue, Astrophys. J. 458, 120 (1996).

    Article  ADS  Google Scholar 

  5. A. S. Rastorguev, E. V. Glushkova, A. K. Dambis, and M. V. Zabolotskikh, Pis’ma Astron. Zh. 25, 689 (1999) [Astron. Lett. 25, 595 (1999)].

    Google Scholar 

  6. Y. Sofue, Y. Tutui, M. Honma, et al., Astrophys. J. 523, 136 (1999).

    Article  ADS  Google Scholar 

  7. T. C. Beers and J. Sommer-Larsen, Astrophys. J., Suppl. Ser. 96, 175 (1995).

    Article  ADS  Google Scholar 

  8. M. Schmidt, Stars Stell. Syst. 4, 513 (1965).

    Google Scholar 

  9. J. A. R. Caldwell and J. P. Ostriker, Astrophys. J. 251, 61 (1981).

    Article  ADS  Google Scholar 

  10. K. Rohlfs and J. Kreitsehmann, Astrophys. Space Sci. 79, 289 (1981).

    ADS  Google Scholar 

  11. B. Dauphole and J. Colin, Astron. Astrophys. 300, 117 (1995).

    ADS  Google Scholar 

  12. R. P. Olling and M. R. Merrifield, Mon. Not. R. Astron. Soc. 311, 361 (2000).

    Article  ADS  Google Scholar 

  13. A. Toomre, Astrophys. J. 139, 1217 (1964).

    Article  ADS  Google Scholar 

  14. A. G. Morozov and A. V. Khoperskov, Astrofizika 24, 467 (1986).

    ADS  Google Scholar 

  15. V. L. Polyachenko, E. V. Polyachenko, and A. V. Strel’nikov, Pis’ma Astron. Zh. 23, 598 (1997) [Astron. Lett. 23, 525 (1997)].

    ADS  Google Scholar 

  16. A. V. Khoperskov, A. V. Zasov, and N. V. Tyurina, Astron. Zh. 78, 213 (2001) [Astron. Rep. 45, 180 (2001)].

    Google Scholar 

  17. V. L. Polyachenko and I. G. Shykhman, Pis’ma Astron. Zh. 3, 254 (1977) [Sov. Astron. Lett. 3, 134 (1977)].

    ADS  Google Scholar 

  18. A. V. Zasov, D. I. Makarov, and E. A. Mikhailova, Pis’ma Astron. Zh. 17, 884 (1991) [Sov. Astron. Lett. 17, 374 (1991)].

    ADS  Google Scholar 

  19. A. G. Morozov, Astron. Zh. 58, 734 (1981) [Sov. Astron. 25, 421(1981)].

    ADS  Google Scholar 

  20. J. N. Bahcall and R. M. Soneira, Astrophys. J., Suppl. Ser. 44, 73 (1980).

    Article  ADS  Google Scholar 

  21. A. A. Sumin, A. M. Fridman, and U. A. Khaud, Pis’ma Astron. Zh. 17, 698 (1991) [Sov. Astron. Lett. 17, 295 (1991)].

    ADS  Google Scholar 

  22. P. D. Sackett, Astrophys. J. 483, 103 (1997).

    Article  ADS  Google Scholar 

  23. A. A. Sumin, A. M. Fridman, and U. A. Khaud, Pis’ma Astron. Zh. 17, 779 (1991) [Sov. Astron. Lett. 17, 329 (1991)].

    ADS  Google Scholar 

  24. R. Fux, Astron. Astrophys. 327, 983 (1997).

    ADS  Google Scholar 

  25. R. Fux, Astrophys. Space Sci. 276, 367 (2001).

    Article  ADS  Google Scholar 

  26. W. Dehnen and J. J. Binney, Mon. Not. R. Astron. Soc. 298, 387 (1998).

    Article  ADS  Google Scholar 

  27. J. N. Bahcall, Astrophys. J. 276, 156 (1984).

    ADS  Google Scholar 

  28. J. E. Barnes and P. Hut, Astrophys. J., Suppl. Ser. 70, 389 (1989).

    Article  ADS  Google Scholar 

  29. A. M. Fridman, O. V. Khoruzhii, and A. E. Piskunov, in Physics of the Gaseous and Stellar Disks of the Galaxy, ASP Conf. Ser. 66, Ed. by I. R. King (Astronomical Society of the Pacific, San Francisco, 1994), p. 215.

    Google Scholar 

  30. A. C. Quillen and D. R. Garnett, in Galaxy Disks and Disk Galaxies, ASP Conf. Ser. 230, Ed. by J. G. Funes and S. J. Corsini (Astronomical Society of the Pacific, San Francisco, 2001), p. 87; astro-ph/0004210.

    Google Scholar 

  31. E. A. Mikhailova, A. V. Khoperskov, and S. S. Sharpak, in Stellar Dynamics: From Classic to Modern, Ed. by L. P. Ossipkov and I. I. Nikiforov (St. Petersburg, 2001), p. 147.

  32. L. H. Amaral, R. Ortiz, J. R. D. Lepine, and W. J. Maciel, Mon. Not. R. Astron. Soc. 281, 339 (1996).

    ADS  Google Scholar 

  33. A. K. Dambis, A. M. Mel’nik, and A. S. Rastorguev, Pis’ma Astron. Zh. 21, 331 (1995) [Astron. Lett. 21, 291 (1995)].

    ADS  Google Scholar 

  34. I. I. Nikiforov, in Stellar Dynamics: From Classic to Modern, Ed. by L. P. Ossipkov and I. I. Nikiforov (St. Petersburg, 2001), p. 28.

  35. A. K. Dambis, A. M. Mel’nik, and A. S. Rastorguev, Pis’ma Astron. Zh. 27, 68 (2001) [Astron. Lett. 27, 58 (2001)].

    Google Scholar 

  36. A. S. Rastorguev, M. V. Zabolotskikh, and A. K. Dambis, Astron. Lett. 28, 454 (2002).

    ADS  Google Scholar 

  37. I. I. Nikiforov, IAU Coll. 174: Small Galaxy Groups, ASP Conf. Ser. 209, Ed. by M. J. Valtonen and C. Flynn (Astronomical Society of the Pacific, San Francisco, 2000), p. 403.

    Google Scholar 

  38. P. C. van der Kruit and L. Searle, Astron. Astrophys. 95, 116 (1981).

    ADS  Google Scholar 

  39. P. C. van der Kruit, in Galaxy Disks and Disk Galaxies, ASP Conf. Ser. 230, Ed. by J. G. Funes and E. M. Corsini (Astronomical Society of the Pacific, San Francisco, 2001), p. 119.

    Google Scholar 

  40. A. V. Barabanov and A. V. Zasov, Astron. Zh. 56, 252 (1979) [Sov. Astron. 23, 138 (1979)].

    ADS  Google Scholar 

  41. A. M. N. Ferguson and C. J. Clarke, Mon. Not. R. Astron. Soc. 325, 781 (2001).

    Article  ADS  Google Scholar 

  42. W. Dehnen, Astron. J. 115, 2384 (1998).

    Article  ADS  Google Scholar 

  43. S. Frink, B. Fuchs, S. Roser, and R. Wiellen, Astron. Astrophys. 314, 430 (1996).

    ADS  Google Scholar 

  44. H. Hasan and C. Norman, Astrophys. J. 361, 69 (1990).

    Article  ADS  Google Scholar 

  45. R. D. Blum, J. S. Carr, D. L. DePoy, et al., Astrophys. J. 422, 111 (1994).

    Article  ADS  Google Scholar 

  46. R. D. Blum, J. S. Carr, K. Sellgren, and D. M. Terndrup, Astrophys. J. 449, 623 (1995).

    Article  ADS  Google Scholar 

  47. R. M. Rich, Astrophys. J. 362, 604 (1990).

    Article  ADS  Google Scholar 

  48. D. Minniti, S. D. M. White, E. W. Olszewski, and J. M. Hill, Astrophys. J. 393, L47 (1992).

    Article  ADS  Google Scholar 

  49. K. Z. Stanek, A. Udalski, M. Szymaski, et al., Astrophys. J. 477, 163 (1997).

    Article  ADS  Google Scholar 

  50. B. J. Weiner and J. A. Sellwood, Astrophys. J. 524, 112 (1999).

    Article  ADS  Google Scholar 

  51. O. E. Gerhard, in Galaxy Disks and Disk Galaxies, Ed. by J. G. Funes and E. M. Corsini (Astron. Soc. of the Pacific, San Francisco, 2001), p. 21.

    Google Scholar 

  52. J. Binney, O. Gerhard, and D. Spergel, Mon. Not. R. Astron. Soc. 288, 365 (1997).

    ADS  Google Scholar 

  53. A. M. Fridman, in Physics of the Gaseous and Stellar Disks of the Galaxy, ASP Conf. Ser. 66, Ed. by I. R. King (Astronomical Society of the Pacific, San Francisco, 1994), p. 15.

    Google Scholar 

  54. T. J. Jones, M. Ashley, A. R. Hyland, and A. Ruelas-Mayorga, Mon. Not. R. Astron. Soc. 197, 413 (1981).

    ADS  Google Scholar 

  55. S. M. Kent, T. M. Dame, and G. Fazio, Astrophys. J. 378, 131 (1991).

    Article  ADS  Google Scholar 

  56. R. Fux and L. Martinet, Astron. Astrophys. 287, L21 (1994).

    ADS  Google Scholar 

  57. H. T. Freudenreich, Astrophys. J. 492, 495 (1998).

    Article  ADS  Google Scholar 

  58. P. L. Hammersley, M. Cohen, F. Garzon, et al., Mon. Not. R. Astron. Soc. 308, 333 (1999).

    Article  ADS  Google Scholar 

  59. J. N. Bahcall and S. Casertano, Astrophys. J. 284, L35 (1984).

    ADS  Google Scholar 

  60. A. Gould, Mon. Not. R. Astron. Soc. 244, 25 (1990).

    ADS  Google Scholar 

  61. K. Kuijken and G. Gilmore, Astrophys. J. Lett. 367, L9 (1991).

    Article  ADS  Google Scholar 

  62. M. Creze, E. Chereul, O. Bienayme, and C. Pichon, Astron. Astrophys. 329, 920 (1998).

    ADS  Google Scholar 

  63. A. Could, J. N. Bahcall, and C. Flynn, Astrophys. J. 465, 759 (1996).

    ADS  Google Scholar 

  64. N. I. Reid and S. R. Majewski, Astrophys. J. 409, 635 (1993).

    Article  ADS  Google Scholar 

  65. M. Haywood, A. C. Robin, and M. Creze, Astron. Astrophys. 320, 440 (1997).

    ADS  Google Scholar 

  66. A. Vallenari, G. Bertelli, and L. Schmidtobreick, Astron. Astrophys. 361, 73 (2000).

    ADS  Google Scholar 

  67. C. Alard, Mon. Not. R. Astron. Soc. (2001); astro-ph/0007013.

Download references

Author information

Authors and Affiliations

  1. Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow, 119992, Russia

    A. V. Khoperskov & N. V. Tyurina

Authors
  1. A. V. Khoperskov
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. N. V. Tyurina
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

__________

Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 80, No. 6, 2003, pp. 483–498.

Original Russian Text Copyright © 2003 by Khoperskov, Tyurina.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Khoperskov, A.V., Tyurina, N.V. A dynamical model of the Galaxy. Astron. Rep. 47, 443–457 (2003). https://doi.org/10.1134/1.1583771

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1134/1.1583771

Keywords

Search

Navigation