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Astrophysics

, Volume 60, Issue 3, pp 305–312 | Cite as

Discovery and Study of Spiral Galaxies with Dark Matter in a Series of Clusters in the Northern Galactic Hemisphere

  • T. M. Borchkhadze
  • N. G. Kogoshvili
  • A. T. Kalloghlian
Article

Data from the Merged Catalog of Galaxies (MERCG) are used to study the dynamic characteristics of spiral galaxies with absolute magnitudes M ≥ −20m.6 in the Perseus, A779, and Coma clusters and the Great Wall formation. The diameters of the galaxies from the MERCG were used to determine the radius R D corresponding to the possible radius within which dark matter is concentrated. The dynamic parameters M dyn and M dyn /L B of the spiral galaxies were calculated based on the condition of centrifugal equilibrium. The theory of angular momentum transfer was used to estimate the central surface density m 0 and angular momentum K of stars in the spiral galaxies. A comparison of the dynamic parameters of the spiral galaxies with M ≥ −20m.6 and M ≤ −20m.6 reveals a statistically significant reduction in the number of spiral galaxies with M ≥ −20m.6 that have a larger fraction of dark matter. The following values have been obtained for these clusters: Perseus (35.3%), A779 (17.4%), Coma (12.6%), and Great Wall (23.6%).

Keywords

galactic clusters dark matter dynamic parameters 

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  • T. M. Borchkhadze
    • 1
  • N. G. Kogoshvili
    • 1
  • A. T. Kalloghlian
    • 2
  1. 1.E. K. Kharadze Abastumani Astrophysical ObservatoryIlia State UniversityTbilisiGeorgia
  2. 2.V. A. Ambartsumyan Byurakan Astrophysical ObservatoryByurakanArmenia

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