Possible dark matter in spiral galaxies of the coma cluster |
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| Authors: | N G Kogoshvili G A Malasidze T M Borchkhadze |
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| Institution: | (1) E. K. Kharadze Abastumani Astrophysical Observatory, Abastumani, Georgia;(2) Georgian Technical University, Tblisi, Georgia |
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| Abstract: | The relationship between the rotation curves for the galaxies and the distribution of mass and angular momentum within the
galaxies is examined. The theory of angular momentum transfer is applied to the observed properties of the galaxies. The coupling
between the dynamical mass of a spiral galaxy and its luminosity is studied. Most of the spiral galaxies in subclusters surrounding
NGC 4889, NGC 4874, and NGC 4839 in the Coma cluster are galaxies that have lower luminosities, with MB fainter than −21m.5. These galaxies are characterized by a higher mass-to-luminosity ratio than that of the galaxies with higher luminosities
MB brighter than −21m.5, which suggests the presence of a large fraction of dark matter in the spiral galaxies of the subclusters.
Translated from Astrofizika, Vol. 52, No. 1, pp. 75–84 (February 2009). |
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| Keywords: | galaxies dynamical mass Coma cluster- dark matter |
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