Multi-spectral study of a new sample of Blue Compact Dwarf Galaxies^*

II. B and R surface photometry of 22 southern objects

¹ European Southern Observatory, Karl Schwarzschild St. 2, D–85748 Garching, Germany
² ST-ECF, European Southern Observatory, Karl Schwarzchild St. 2, D–85748 Garching, Germany
³ Dept of Astronomy, University of Illinois at Urbana-Champaign, 1002 West Green Street Urbana, IL 61801, U.S.A. e-mail: caulet@astro.uiuc.edu
⁴ Previously affiliated to the Astrophysics Division, Space Science Department of the European Space Agency
⁵ Observatoire de Marseille and Institut Gassendi, (CNRS), 2 place Le Verrier, F–13248 Marseille Cedex 04, France

Send offprint request to: V. Doublier

Received: 22 January 1998
Accepted: 25 May 1999

Abstract

We present the results of surface photometry on a new sample of Blue Compact Dwarf galaxies (BCDGs), in continuation to a previous paper (Doublier et al. 1997, hereafter Paper I). The 22 galaxies (plus two companions) discussed in the present paper have been selected in the Southern Hemisphere, from several lists. An atlas containing isophotal maps, surface brightnesses and color profiles of the sample is given, together with the tables containing the photometric parameters. The results are consistent with those obtained in Paper I for objects selected from the Byurakan Surveys in the Northern hemisphere. Similarly, we find about one fourth of the BCDGs showing a dominant brightness distribution component, one fourth of the BCDG showing a dominant exponential surface brightness profile, and about half of them show composite brightness distributions. Integrated properties, colors, mean surface brightnesses and luminosity-radius relations are investigated and discussed for the objects presented in this paper and Paper I. We found that BCDGs tend to show a different behaviour compared to the exponential BCDGs, with respect to colors, compactness and luminosity-radius relations. We also include a brief study of the surroundings of the galaxies, where we find several candidate companions.