New Probable Dwarf Galaxies in Northern Groups of the Local Supercluster

Details New Probable Dwarf Galaxies in Northern Groups of the Local Supercluster New Probable Dwarf Galaxies in Northern Groups of the Local Supercluster

2007-08-27

arxiv.org/abs/0708.3547v1

Astron.Lett.33:512-519,2007

Astronomy and Astrophysics

Astrophysics

8 pages, 1 fugure

Scientific paper

10.1134/S1063773707080026

We have searched for nearby dwarf galaxies in 27 northern groups with characteristic distances 8-15 Mpc based on the Second Palomar Sky Survey prints. In a total area of about 2000 square degrees, we have found 90 low-surface-brightness objects, more than 60% of which are absent from known catalogs and lists. We have classified most of these objects (~80%) as irregular dwarf systems. The first 21-cm line observations of the new objects with the 100-m Effelsberg radio telescope showed that the typical linear diameters (1-2 kpc), internal motions (30 km/s), and hydrogen masses (~2*10^7M_sun) galaxies correspond to those expected for the dwarf population of nearby groups.

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