Surface photometry of new nearby dwarf galaxies

Details Surface photometry of new nearby dwarf galaxies Surface photometry of new nearby dwarf galaxies

2002-01-15

arxiv.org/abs/astro-ph/0201234v1

Astronomy and Astrophysics

Astrophysics

accepted by A&A

Scientific paper

10.1051/0004-6361:20020006

We present CCD surface photometry of 16 nearby dwarf galaxies, many of which were only recently discovered. Our sample comprises both isolated galaxies and galaxies that are members of nearby galaxy groups. The observations were obtained in the Johnson B and V bands (and in some cases in Kron-Cousins I). We derive surface brightness profiles, total magnitudes, and integrated colors. For the 11 galaxies in our sample with distance estimates the absolute B magnitudes lie in the range of -10>Mb>-13. The central surface brightness ranges from 22.5 to 27.0 mag/sq.arcsec. Most of the dwarf galaxies show exponential light profiles with or without a central light depression. Integrated radial color gradients, where present, appear to indicate a more centrally concentrated younger population and a more extended older population.

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