EDP Sciences
Free access
Issue
A&A
Volume 384, Number 1, March II 2002
Page(s) 72 - 80
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20020006


A&A 384, 72-80 (2002)
DOI: 10.1051/0004-6361:20020006

Surface photometry of new nearby dwarf galaxies

L. N. Makarova1, 2, I. D. Karachentsev1, E. K. Grebel3 and O. Yu. Barsunova4

1  Special Astrophysical Observatory of the Russian Academy of Sciences, Nizhnij Arkhyz 369167, Karachaevo-Cherkessia, Russia
    e-mail: lidia@sao.ru; ikar@luna.sao.ru
2  Isaac Newton Institute of Chile, SAO Branch, Russia
3  Max-Plank-Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany
    e-mail: grebel@mpia-hd.mpg.de
4  Astronomical Institute, St. Petersburg State University, 198904 St. Petersburg, Russia
    e-mail: monoceros@mail.ru

(Received 29 August 2001 / Accepted 19 December 2001)

Abstract
We present CCD surface photometry of 16 nearby dwarf galaxies, many of which were only recently discovered. Our sample is comprised of 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 $-10 \ga M_B \ga -13$. The central surface brightness ranges from 22.5 to 27.0 mag arcsec -2. 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.


Key words: galaxies: dwarf -- galaxies: photometry -- galaxies: fundamental parameters -- galaxies: irregular -- galaxies: evolution

Offprint request: L. N. Makaova, lidia@sao.ru

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