Towards a new classification of early-type galaxies: an integral-field view

Details Towards a new classification of early-type galaxies: an integral-field view Towards a new classification of early-type galaxies: an integral-field view

2007-09-04

arxiv.org/abs/0709.0357v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, to appear in "Pathways Through an Eclectic Universe", J. H. Knappen, T. J. Mahoney, and A. Vazedekis (Eds.

Scientific paper

In this proceeding we make use of the two-dimensional stellar kinematics of a representative sample of E and S0 galaxies obtained with the SAURON integral-field spectrograph to reveal that early-type galaxies appear in two broad flavours, depending on whether they exhibit clear large-scale rotation or not. We measure the level of rotation via a new parameter LambdaR and use it as a basis for a new kinematic classification that separates early-type galaxies into slow and fast rotators. With the aid of broad-band imaging we will reinforce this finding by comparing our kinematic results to the photometric properties of these two classes.

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