B, V, I photometry of 20 dwarf irregular galaxies within 10 Mpc |
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| Authors: | L Makarova I Karachentsev L Rizzi R B Tully G Korotkova |
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| Institution: | Special Astrophysical Observatory, Nizhnij Arkhyz, Karachaevo-Cherkessia 369167, Russia;Isaac Newton Institute of Chile, SAO Branch, Casilla 8-9, Correo 9, Santiago, Chile;Joint Astronomy Centre, 660 N. A'ohoku Place, University Park, Hilo, HI 96720, USA;Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA |
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| Abstract: | CCD photometry is presented for 20 dIrr galaxies situated in the nearby complexes CenA/M83, and CVnI as well as in the general field of the Local Volume. We present integrated magnitudes of the galaxies in B , V , I bands and also surface brightness profiles to a median isophote μ B ∼ 28 mag arcsec−2. The popular Sersic parametrization of surface brightness profiles generally does a poor job of simultaneously fitting the inner cores and outer exponential surface brightness fall-offs observed in many of our targets. The observed sample is a part of a general project to image about 500 nearby ( D < 10 Mpc) dwarf galaxies in multiple bands. |
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| Keywords: | galaxies: dwarf galaxies: fundamental parameters galaxies: irregular galaxies: photometry |
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