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 globularclusters: The database [http://www.physics.mcmaster.ca/resources/globular.html].

Globular Clusters - Guides to Galaxies. Proceedings of theJoint ESO-FONDAP Workshop on Globular Clusters, Concepcion, Chile, 6-10 March 2006 (Springer, 2009).

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

A.M. Eigenson, O.S. Yatsyk. Comparative classification ofglobular 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 velocityanisotropy parameter for some globular clusters: the case ofstationary model. ASPS Conf.228, 371 (2001).

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

P.Miocchi, B.Lanzoni, F.R.Ferraroet al. Star count densityprofiles and structural parameters of 26 galactic globularclusters. Astrophys. J.774, 151 (2013). https://doi.org/10.1088/0004-637X/774/2/151

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

Z.I. Rusev, R.M. Peikov. Spatial structure of the globularcluster 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