Other
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ycat..34300411g&link_type=abstract
VizieR On-line Data Catalog: J/A+A/430/411. Originally published in: 2005A&A...430..411G
Other
Clusters: Galaxy, Photometry: Ccd, Morphology
Scientific paper
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 (2003AJ....125.2936G) that the apparent dichotomy between E and dE galaxies in the luminosity-<{mu}>e plane no longer appears when other structural parameters are considered and can be entirely attributed to the onset of "core" galaxies at BT~-20.5mag. 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 BT~-15 have a B-I spread>0.5mag.
(1 data file).
Boselli Alessandro
Cucciati Olga
Davies John J.
Donati Alessandro
Gavazzi Giuseppe
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