The kinematics of the Galaxy by proper motions of stars

1Fedorov, PN, 1Akhmetov, VS, 1Velichko, AB, 2Shulga, VM
1Institute of Astronomy of Kharkiv National University, Kharkiv, Ukraine
2Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkiv, Ukraine
Kosm. nauka tehnol. 2015, 21 ;(6):62–67
Section: Space and Atmospheric Physics
Publication Language: Russian

The kinematic analysis of proper motions of stars of the XPM2, PPMXL and UCAC4 catalogues, which was performed based on the linear Ogorodnikov-Milne model is present. It is shown that in the bright end of the whole magnitude interval the kinematic parameters of the Galaxy are in agreement with values accepted by the IAU. It is found that the Oort constant B is practically independent from the magnitude and its mean value is about 10.5 km· s−1kpc−1. At the same time, the Oort constant A depends on the magnitude and its values vary from 14.22 to 5 km· s−1kpc−1. One possible reason for this observed effect could be the presence of the magnitude equation in proper motions of stars of the used catalogues. 

Keywords: astrometry, catalogues, Galaxy, kinematics

1. Ogorodnikov K. F. The dynamics of stellar systems. 627 p. (Fizmatgiz, Moscow, 1965) [in Russian].

2. Arias E. F., Charlot P., Feissel M., Lestrade J.-F. The extragalactic reference system of the International Earth Rotation Service, ICRS. Astron. and Astrophys. 303, 604—608 (1995).

3. Clube S. V. M. Galactic rotation and the precession constant. Mon. Notic. Roy. Astron. Soc. 159, 289 (1972).

4. Clube S. V. M. Another look at the absolute proper motions obtained from the Lick pilot programme. Mon. Notic. Roy. Astron. Soc. 161, 445—463 (1973).

5. du Mont B. A three dimensional analysis of the kinematics of 512 FK5/FK4 sup stars. Astron. and Astrophys. 61, 127—132 (1977).

6. du Mont B. A rediscussion of determination of precession and Galactic rotation from Lick proper motions referred to galaxies. Astron. and Astrophys. 66, 441—451 (1978).

7. Fedorov P. N., Akhmetov V. S., Bobylev V. V. Residual rotation of the HIPPARCOS/Tycho2 system with respect to extragalactic system. Mon. Notic. Roy. Astron. Soc. 416, 403—408 (2011).

8. Fedorov P. N., Akhmetov V. S., Bobylev V. V., Baikova A. T. An investigation of the absolute proper motions of the XPM catalogue. Mon. Notic. Roy. Astron. Soc. 406, 1734—1744 (2010).

9. Fedorov P. N., Akhmetov V. S., Bobylev V. V ., Gontcharov G. A. The XPM catalogue as a realization of the ICRS in optical and near-infrared ranges of wavelengths. Mon. Notic. Roy. Astron. Soc. 415, 665—672 (2011).

10. Fedorov P. N., Myznikov A. A., Akhmetov V. S. The XPM Catalogue: absolute proper motions of 280 million stars. Mon. Notic. Roy. Astron. Soc. 393, 133—138 (2009).

11. Finch C. T., Zacharias N., Wycoff G. L. UCAC3: Astrometric reductions. Astron. J. 139, 2200—2207 (2010).

12. Girard T. M., W. van Altena, Zacharias N., et al. The Southern proper motion program. IV. The SPM4 catalog. Astron. J. 142, 12 p. (2011).

13. Hanson R. B., Klemola A. R., Jones B. F, Monet D. G. Lick Northern Proper Motion program: III. NPM2 Catalog. Astron. J. 128, 1430—1445 (2004).

14. Hög E., Fabricius C., Makarov V. V., et al. The Tycho-2 catalogue of the 2.5 million brightest stars. Astron. and Astrophys. 355, 27—30 (2000).

15. Klemola A. R., Hanson R. B., Jones B. F. Lick NPM program: NPM1 Catalog and its applications. Galactic and Solar System Optical Astrometry, Eds L. V. Morrison, G. F. Gilmore, P. 20 (Univ. Press, Cambridge, 1994).

16. Kovalevsky J., Lindegren L., Perryman M. A. C., et al. The HIPPARCOS catalogue as a realisation of the extragalactic reference system. Astron. and Astrophys. 323, 620—633 (1997).

17. Perriman M. A. C., Lindegren L., Kovalevsky J., et al. The HIPPARCOS catalogue. Astron. and Astrophys. 323(1), 49—52 (1997).

18. Platais I., Girard T. M., Kozhurina-Platais V., et al. The Southern Proper Motion program. II. A catalog at the South Galactic Pole. Astron. J. 116, 2556—2564 (1998).

19. Roeser S., Demleitner M., Schilbach E. The PPMXL catalog of positions and proper motions on the ICRS. Combining USNO-B1.0 and the Two Micron All Sky Survey (2MASS). Astron. J. 139(6), 2440—2447 (2010).

20. Rybka S. P., Yatsenko A. I. The GPM catalog (Rybka+, 1997—2001) VizieR On-line Data Catalog: I/285. Kinematics and Physics of Celestial Bodies. 13(5), 70—74 (1997).

21. Skrutskie M. F., Cutri R. M., Stiening R. The Two Micron All Sky Survey (2MASS). Astron. J. 131(2), 1163—1183 (2006).

22. Zacharias N., Finch C., Girard T., et al. The Third US Naval Observatory CCD Astrograph Catalog (UCAC3). Astron. J. 139(6), 2184—2199 (2010).

23. Zacharias N., Urban S. E., Zacharias M. I., et al. The Fourth U. S. Naval Observatory CCD Astrograph Catalog (UCAC4). Astron. J. 145, P. 1538 (2013).