Volume 430, Number 2, February I 2005
|Page(s)||411 - 419|
|Published online||20 January 2005|
The structure of elliptical galaxies in the Virgo cluster. Results from the INT Wide Field Survey*
Universitá degli Studi di Milano-Bicocca, P.zza della Scienza 3, 20126 Milano, Italy e-mail: [Giuseppe.Gavazzi;alessandro.donati]@mib.infn.it
2 Department of Physics and Astronomy, Cardiff University, UK e-mail: email@example.com
3 Laboratoire d'Astrophysique de Marseille, BP8, Traverse du Siphon, 13376 Marseille, France e-mail: firstname.lastname@example.org
4 Max-Planck-Institut für Astrophysik, Garching, Germany e-mail: email@example.com
Accepted: 16 September 2004
We report on a complete CCD imaging survey of 226 elliptical galaxies in the North-East quadrant of the Virgo cluster, representative of the properties of giant and dwarf elliptical galaxies in this cluster. We fit their radial light profiles with the Sersic model of light distribution. We confirm the result of Graham & Guzman ([CITE], AJ, 125, 2936) that the apparent dichotomy between E and dE galaxies in the luminosity– plane no longer appears when other structural parameters are considered and can be entirely attributed to the onset of “core” galaxies at mag. When “core” galaxies are not considered, E and dE form a unique family with n linearly increasing with the luminosity. For 90 galaxies we analyze the color indices, both in the nuclear and in the outer regions. Both indices are bluer toward fainter luminosities. We find also that the outer color gradients do not show any significant correlation with the luminosity. The scatter in all color indicators increases significantly toward lower luminosities, e.g. galaxies fainter than have a spread > 0.5 mag.
Key words: galaxies: elliptical and lenticular, cD / galaxies: fundamental parameters / galaxies: clusters: individual: Virgo
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.