Surface photometry of dwarf galaxies in Virgo Virtual Observatory Resource

Authors
  1. Ryden B.S.
  2. Terndrup D.M.
  3. Pogge R.W.
  4. Lauer T.R.
  5. Published by
    CDS
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) {prop.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.

Keywords
  1. galaxy-clusters
  2. surface-photometry
Bibliographic source Bibcode
1999ApJ...517..650R
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/517/650
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/517/650
Document Object Identifer DOI
doi:10.26093/cds/vizier.15170650

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http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/517/650
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History

2000-03-25T09:42:15Z
Resource record created
2000-03-25T08:43:21Z
Updated
2000-03-25T09:42:15Z
Created

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
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cds-question@unistra.fr