Proceedings of the International Astronomical Union

Contributed Papers

Scaling relations in early-type galaxies from integral-field stellar kinematics

M. Cappellaria1, N. Scotta1, K. Alataloa2, L. Blitza2, M. Boisa3, F. Bournauda4, M. Bureaua1, R. L. Daviesa1, T. A. Davisa1, P. T. de Zeeuwa5a14, E. Emsellema5a3, J. Falcon-Barrosoa6, S. Khochfara7, D. Krajnovica1, H. Kuntschnera5, P.-Y. Lablanchea3, R. M. McDermida8, R. Morgantia9, T. Naaba10, M. Sarzia11, P. Serraa9, R. C. E. van den Boscha12, G. van de Vena13, A. Weijmansa14 and L. M. Younga15

a1 University of Oxford, UK

a2 University of California, Berkeley, USA

a3 Université de Lyon, France

a4 Université Paris Diderot, France

a5 ESO, Garching, Germany

a6 IAC, La Laguna, Spain

a7 MPI for Extraterrestrial Physics, Garching, Germany

a8 Gemini Observatory, Hilo, USA

a9 ASTRON, Dwingeloo, The Netherlands

a10 Universitäts-Sternwarte München, Germany

a11 University of Hertfordshire, Hatfield, UK

a12 The University of Texas, Austin, USA

a13 IAS, Princeton, USA

a14 Leiden University, The Netherlands

a15 New Mexico Tech, Socorro, USA

Early-type galaxies (ETGs) satisfy a now classic scaling relation Re ∝ σ1.2eI−0.8e, the Fundamental Plane (FP; Djorgovski & Davis 1987; Dressler et al. 1987), between their size, stellar velocity dispersion and mean surface brightness. A significant effort has been devoted in the past twenty years to try to understand why the coefficients of the relation are not the ones predicted by the virial theorem Re ∝ σ2eI−1e.