Can Globular Clusters in the Galaxy Be Classified by the Velocity Anisotropy Parameter?

  • I. U. Tadjibaev National University of Uzbekistan, Chirchik State Pedagogical Institute in Tashkent Region
  • S. N. Nuritdinov National University of Uzbekistan
Keywords: globular star clusters, globular cluster classification, velocity anisotropy parameter

Abstract

Classification problems of globular star clusters in the Galaxy have been briefly discussed. The values of the velocity anisotropy parameter are calculated for 36 globular clusters, by using relatively new data for their apparent surface density. Those values are grouped into three classes. The correlation of the examined parameter with other parameters of globular clusters is analyzed.

References

W. Harris. Catalog of parameters for Milky Way globular clusters: The database [http://www.physics.mcmaster.ca/resources/globular.html].

Globular Clusters – Guides to Galaxies. Proceedings of the Joint ESO-FONDAP Workshop on Globular Clusters, Concepci´on, Chile, 6–10 March 2006 (Springer, 2009).

B.V. Kukarkin. On the concentraion classes of globular star clusters. Astron. Zh. 48, 113 (1971) (in Russian).

A.M. Eigenson, O.S. Yatsyk. Comparative classification of globular clusters of the galaxy and M31 using cluster analysis. Astron. Zh. 72, 641 (1995) (in Russian).

A.E. Ashurov, S.N. Nuritdinov. Finding out the velocity anisotropy parameter for some globular clusters: the case of stationary model. ASPS Conf. 228, 371 (2001).

A.E. Ashurov. On the theory of dynamic evolution of spherical gravitating systems. Ph.D. thesis (St. Petersburg, 1995) (in Russian).

P.Miocchi, B.Lanzoni, F.R.Ferraro et al. Star count density profiles and structural parameters of 26 galactic globular clusters. Astrophys. J. 774, 151 (2013).

R.M. Peikov, Z.I. Rusev. Spatial structure of the globular cluster M12. Astron. Zh. 65, 41 (1988) (in Russian).

Z.I. Rusev, R.M. Peikov. Spatial structure of the globular cluster M56. Astron. Zh. 63, 483 (1986) (in Russian).

Published
2019-05-16
How to Cite
Tadjibaev, I., & Nuritdinov, S. (2019). Can Globular Clusters in the Galaxy Be Classified by the Velocity Anisotropy Parameter?. Ukrainian Journal of Physics, 64(4), 271. https://doi.org/10.15407/ujpe64.4.271
Section
General physics