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The structure of elliptical galaxies in the Virgo cluster. Results from the INT Wide Field Survey

Gavazzi, G., Donati, A., Cucciati, O., Sabatini, Sabina, Boselli, A., Davies, Jonathan Ivor and Zibetti, S. 2005. The structure of elliptical galaxies in the Virgo cluster. Results from the INT Wide Field Survey. Astronomy and Astrophysics 430 (2) , pp. 411-419. 10.1051/0004-6361:20034571

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Abstract

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 r1/n model of light distribution. We confirm the result of Graham & Guzman (2003, AJ, 125, 2936) that the apparent dichotomy between E and dE galaxies in the luminosity- $\langle \mu\rangle_{\rm e}$ plane no longer appears when other structural parameters are considered and can be entirely attributed to the onset of "core" galaxies at $B_T \sim -20.5$ 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 B-I 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 $B_T \sim -15$ have a B-I spread > 0.5 mag.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: galaxies: elliptical and lenticular, cD -- galaxies: fundamental parameters -- galaxies: clusters: individual: Virgo
Additional Information: Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0004-6361/ (accessed 17/04/2014)
Publisher: EDP Sciences
ISSN: 0004-6361
Date of First Compliant Deposit: 30 March 2016
Last Modified: 10 Oct 2017 14:38
URI: http://orca-mwe.cf.ac.uk/id/eprint/36154

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