Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-11-19
Astronomy and Astrophysics
Astrophysics
accepted for publication by MNRAS
Scientific paper
10.1111/j.1365-2966.2008.14229.x
We investigate the global photometric scaling relations traced by early-type galaxies in different environments, ranging from dwarf spheroidals, over dwarf elliptical galaxies, up to giant ellipticals (-8 mag > M_V > -24 mag). These results are based in part on our new HST/ACS F555W and F814W imagery of dwarf spheroidal galaxies in the Perseus Cluster. These scaling relations are almost independent of environment, with Local Group and cluster galaxies coinciding in the various diagrams. We show that at M_V ~ -14 mag, the slopes of the photometric scaling relations involving the Sersic parameters change significantly. We argue that these changes in slope reflect the different physical processes that dominate the evolution of early-type galaxies in different mass regimes. As such, these scaling relations contain a wealth of information that can be used to test models for the formation of early-type galaxies.
Conselice Chris
de Rijcke Sven
Held Enrico V.
Penny Samantha
Valcke Sander
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