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Distribution of Spiral Galaxies in the Virgo and Fornax Clusters and Their Dynamic Features

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The dynamic characteristics of spiral galaxies with absolute magnitudes M ≥ −20m.6 in the Virgo and Fornax clusters are studied using data from the Merged Catalog of Galaxies MERCG. The galactic diameters from MERCG are used to determine the radius RD that defines the region of possible concentration of dark matter, and the dynamic parameters Mdyn and Mdyn/LB of the spiral galaxies are calculated based on the centrifugal equilibrium condition. Results from the theory of angular momentum transfer are used to estimate the central surface density m0 and angular momentum K of stars in these galaxies. A comparison of the dynamic parameters of the spiral galaxies with M ≥ −20.6 and M ≤ −20.6 reveals a statistically significant higher fraction of dark matter in the spiral galaxies with M ≤ −20.6, at 26.3% in Virgo and 27% in Fornax.

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Authors and Affiliations

  1. E. K. Kharadze Abastumani Astrophysical Observatory, Ilia State University, Tbilisi, Georgia

    N. G. Kogoshvili & T. M. Borchkhadze

  2. V. A. Ambartsumyan Byurakan Astrophysical Observatory, Yerevan, Armenia

    A. T. Kalloghlian

Authors
  1. N. G. Kogoshvili
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  2. T. M. Borchkhadze
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  3. A. T. Kalloghlian
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Corresponding author

Correspondence to N. G. Kogoshvili.

Additional information

Translated from Astrofizika, Vol. 57, No. 4, pp. 513-524 (November 2014).

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Kogoshvili, N.G., Borchkhadze, T.M. & Kalloghlian, A.T. Distribution of Spiral Galaxies in the Virgo and Fornax Clusters and Their Dynamic Features. Astrophysics 57, 473–483 (2014). https://doi.org/10.1007/s10511-014-9350-9

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  • DOI: https://doi.org/10.1007/s10511-014-9350-9

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