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

J. Falcón-Barroso; R. Bacon; M. Cappellari; R. L. Davies; P. T. de Zeeuw; E. Emsellem; D. Krajnovic; H. Kuntschner; R. M. McDermid; R. F. Peletier; M. Sarzi; G. van de Ven

arXiv · 0709.0357

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

J. Falcón-Barroso·R. Bacon·M. Cappellari·R. L. Davies·P. T. de Zeeuw·E. Emsellem·D. Krajnovic·H. Kuntschner·R. M. McDermid·R. F. Peletier·M. Sarzi·G. van de Ven

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Abstract

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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J. Falcón-Barroso, R. Bacon, M. Cappellari, R. L. Davies, P. T. de Zeeuw, E. Emsellem, D. Krajnovic, H. Kuntschner, R. M. McDermid, R. F. Peletier, M. Sarzi, G. van de Ven. 2007-09-04. Towards a new classification of early-type galaxies: an integral-field view. https://arxiv.org/abs/0709.0357

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