Disturbed isolated galaxies: indicators of a dark galaxy population?
Special Astrophysical Observatory, Russian Academy of Sciences, N. Arkhyz, KChR, 369167, Russia e-mail: email@example.com
2 Astronomical Observatory of Kiev University, Observatorna 3, 04053 Kiev, Ukraine
3 Max-Planck-Institut fur Radioastronomy, Auf dem Hugel 69, 53121 Bonn, Germany
Accepted: 14 January 2006
We report the results of our search for disturbed (interacting) objects among very isolated galaxies. The inspections of 1050 northern isolated galaxies from KIG and 500 nearby, very isolated galaxies situated in the Local Supercluster yielded five and four strongly disturbed galaxies, respectively. We suggest that the existence of “dark” galaxies explains the observed signs of interaction. This assumption leads to a cosmic abundance of dark galaxies (with the typical masses for luminous galaxies) that is less than ~1/20 the population of visible galaxies.
Key words: galaxies: interactions
© ESO, 2006