Radial velocities of dwarf spheroidal galaxies in the M 81 group

Abstract

Long-slit observations of 4 dwarf spheroidal galaxies in the M 81 group are presented. We have obtained the heliocentric velocity of a globular cluster candidate located near the center of DDO 78 to be 55 +/- 10 km s^-1 by cross-correlation with template stars. We estimated a heliocentric radial velocity of -116 +/- 21 km s^-1 for an HII region seen in K 61. A red diffuse object near the K 64 center is found to be a remote galaxy with a heliocentric velocity of +46 530 km s^-1. Based on observations collected with the 6 m telescope of the Special Astrophysical Observatory (SAO) of the Russian Academy of Sciences (RAS), operated under the financial support of the Science Department of Russia (registration number 01-43).