Faber-Jackson Relation for dwarf E/S0 Galaxies

Details Faber-Jackson Relation for dwarf E/S0 Galaxies Faber-Jackson Relation for dwarf E/S0 Galaxies

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007rmxac..29..107m&link_type=abstract

First Light Science with the GTC (Eds. R. Guzmán, C. Packham, J. M. Rodríguez-Espinosa, & S. Torres-Peimbert) Revista Mexicana d

Astronomy and Astrophysics

Astronomy

Galaxies: Clusters: Individual (Coma), Galaxies: Elliptical And Lenticular, Cd, Galaxies: Dwarf, Galaxies: Kinematics And Dynamics

Scientific paper

We present spectroscopic observations of 72 early-type galaxies in the core of the Coma cluster. Our sample includes 36 dwarf galaxies (dE/dS0) for which we measured velocity dispersion and line strength indices. We confirm that the Faber-Jackson relation holds for the luminous early-type galaxies. However, lower luminosity early-type galaxies follow a different relation: L ∝ σ^{2}. We show that rotation alone cannot be responsible for this change of slope. We also derive ages, metallicities and [α/Fe] ratios for this sample of galaxies.

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