Astrophysics

, Volume 3, Issue 3, pp 194–202 | Cite as

Dwarfs in some close groups of galaxies

  • E. V. Evyagina
Article
  • 15 Downloads

Conclusions

The concentration of dwarf galaxies in a poor group of galaxies can be investigated by comparing the distribution of objects of low surface brightness in the region of the group with its broader neighborhood. Restriction to a single region at a given distance from the group may lead to incorrect conclusions, owing to the very irregular distribution of the faint objects. A study of the neighborhoods of three close groups of galaxies defined by common radial velocities revealed that irregular dwarfs of very low surface brightness (such as NGC 6822, IC 1613 in the local group) exhibit a tendency to concentrate in the same region as giant galaxies. No evidence has been found for the concentration of E-dwarfs with low surface brightness (such as IC 3475) in poor groups of galaxies. The faintest representatives of this type (similar to the systems of Sculptor and Formax) remain beyond the range of visibility on the Palomar charts. Objects which are possible S-dwarfs with very low surface brightness show no tendency to concentrate in the region of poor groups of galaxies.

The author is highly indebted to the Department of Stellar Astronomy of the Shternberg State Astronomical Institute, and especially to Professor B. A. Vorontsov-Vel'yaminov for his help in this research.

Keywords

Radial Velocity Local Group Surface Brightness Single Region Dwarf Galaxy 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    G. Reaves, A. J.,61, 69, 1956.Google Scholar
  2. 2.
    G. Reaves, Publ. A. S. P.,74, 440, 1962.Google Scholar
  3. 3.
    G. Reaves, A. J.,69, 556, 1964.Google Scholar
  4. 4.
    P. Hodge, Publ. A. S. P.,71, 23, 1959.Google Scholar
  5. 5.
    P. Hodge, Publ. A. S. P.,72, 188, 1960.Google Scholar
  6. 6.
    P. Hodge, D. Pyper, and C. Webb, A. J.,70, 559, 1965.Google Scholar
  7. 7.
    I. D. Karachentsev, Astrofizika [Astrophysics],1, 203, 1965.Google Scholar
  8. 8.
    B. A. Vorontsov-Vel'yaminov and V. P. Arkhipova, Morphological Catalog of Galaxies [in Russian], part 2, 1965; part 3, 1963.Google Scholar
  9. 9.
    M. Humason, N. Mayall, and A. Sandadge, A. J.,61, 97, 1956.Google Scholar
  10. 10.
    Yu. P. Pskovskii, Astron. zh.,38, 1032, 1961.Google Scholar
  11. 11.
    E. Holmberg, Medd. Lunds Astron. obs.,2, 136, 1958.Google Scholar
  12. 12.
    J. Sersik, Z. Ap.,50, 168, 1960.Google Scholar
  13. 13.
    S. van der Bergh, Publ. David Dunlap Obs., Univ. Toronto,2, 5, 147, 1959.Google Scholar
  14. 14.
    F. Zwicky, E. Herzog, and P. Wild, Catalog of Galaxies and of Clusters of Galaxies, Zürich, vol. 1, 1961; vol. 2, 1963; vol. 3, 1965.Google Scholar

Copyright information

© The Faraday Press, Inc. 1969

Authors and Affiliations

  • E. V. Evyagina

There are no affiliations available

Personalised recommendations