Discovery and Study of Spiral Galaxies with Dark Matter in a Series of Clusters in the Northern Galactic Hemisphere
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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%).
Keywordsgalactic clusters dark matter dynamic parameters
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- 1.N. G. Kogoshvili and T. M. Borchkhadze, Abastum. astrofiz. observ. Byull. 77 (2004). (Merged Catalog of Galaxies MERCG, on the web at http://library.iliauni.edu.ge/galaxies.html)
- 2.G. de Vaucouleurs, A. de Vaucouleurs, H. G. Corwin et al., RCBG, Springer Verlag (1999).Google Scholar
- 3.B. A. Vorontsov-Vel’yaminov, A. A. Krasnogorskaya, and V. P. Arkhipova, MKG, I-V (1964-1974).Google Scholar
- 9.G. de Vaucouleurs, Astrophys. J. Suppl. 48 (1961), UBV 461 gal.Google Scholar