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For refcode 1999ApJ...517..650R:
Retrieve 132 NED objects in this reference.
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1999ApJ...517..650R Detailed Surface Photometry of Dwarf Elliptical and Dwarf S0 Galaxies in the Virgo Cluster BARBARA S. RYDEN, DONALD M. TERNDRUP, AND RICHARD W. POGGE Department of Astronomy, The Ohio State University, 174 W. 18th Avenue, Columbus, OH 43210; ryden@astronomy.ohio-state.edu, terndrup@astronomy.ohio-state.edu, pogge@astronomy.ohio-state.edu AND TOD R. LAUER Kitt Peak National Observatory, NOAO, P.O. Box 26732, Tucson, AZ 85716; lauer@noao.edu Received 1996 September 16; accepted 1999 January 4 ABSTRACT We analyze new V-band images of 14 dwarf S0 galaxies and 10 dwarf elliptical galaxies in the Virgo Cluster, in combination with R-band images of 70 dwarf elliptical galaxies from an earlier paper. We compute the intensity-weighted mean ellipticity, the mean deviations from elliptical isophotes, and a newly defined parameter to measure isophotal twists. We also fit each major-axis profile to a power law {SIGMA}(a)is proportional to exp[-(a/a_s_)^n^], where n is allowed to vary. Consistent with other studies of the Virgo dwarf ellipticals, we find that the profile shapes for the entire sample is strongly peaked near n=1 (exponential profiles) and that no galaxies have n=1/4 (de Vaucouleurs profile). The faintest galaxies all have nearly exponential profiles, while the brighter ones on average have n<1. The correlation between ellipticity and the boxy/disky parameter is similar to that of large elliptical galaxies, suggesting that dwarfs may also be divided into two groups with differing internal dynamics. The Virgo dEs also show a greater degree of isophotal twisting than more luminous elliptical galaxies. There does not seem to be any combination of parameters from the surface photometry that statistically correlates with the dE/dS0 designation: in particular, the dS0 galaxies do not, on average, have more pointed (disky) isophotes than the dEs. Subject heading: galaxies: clusters: individual (Virgo)-galaxies: elliptical and lenticular, cD-galaxies: photometry-galaxies: structure
Retrieve 132 NED objects in this reference.
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