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Fast and slow rotators: the build-up of the red sequence

Published online by Cambridge University Press:  01 July 2007

Eric Emsellem ,
Michele Cappellari ,
Davor Krajnović ,
Glenn van de Ven ,
R. Bacon ,
M. Bureau ,
Roger L. Davies ,
P. T. de Zeeuw ,
Jesús Falcón-Barroso  and
Harald Kuntschner
...Show all authors
Eric Emsellem
Affiliation:
Université de Lyon 1, Observatoire de Lyon; CNRS, UMR 5574, Centre de Recherche Astrophysique de Lyon; Ecole Normale Supérieure de Lyon, Lyon, France
Michele Cappellari
Affiliation:
Sterrewacht Leiden, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands Sub-Department of Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
Davor Krajnović
Affiliation:
Sub-Department of Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
Glenn van de Ven
Affiliation:
Sterrewacht Leiden, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands Department of Astrophysical Sciences, Peyton Hall, Princeton, NJ 08544, USA Institute for Advanced Study, Einstein Drive, Princeton, NJ 08540, USA
R. Bacon
Affiliation:
Université de Lyon 1, Observatoire de Lyon; CNRS, UMR 5574, Centre de Recherche Astrophysique de Lyon; Ecole Normale Supérieure de Lyon, Lyon, France
M. Bureau
Affiliation:
Sub-Department of Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
Roger L. Davies
Affiliation:
Sub-Department of Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
P. T. de Zeeuw
Affiliation:
Sterrewacht Leiden, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
Jesús Falcón-Barroso
Affiliation:
Sterrewacht Leiden, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands European Space and Technology Centre, Keplerlaan 1, Postbus 299, 2200 AG Noordwijk, The Netherlands
Harald Kuntschner
Affiliation:
Space Telescope European Coordinating Facility, European Southern Observatory, Karl-Schwarzschild-Str 2, 85748 Garching, Germany
Richard M. McDermid
Affiliation:
Sterrewacht Leiden, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
Reynier F. Peletier
Affiliation:
Kapteyn Astronomical Institute, Postbus 800, 9700 AV Groningen, The Netherlands
Marc Sarzi
Affiliation:
Centre for Astrophysics Research, University of Hertfordshire, Hatfield, Herts AL10 9AB, U.K.
Remco C. E. van den Bosch
Affiliation:
Sterrewacht Leiden, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
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Abstract

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Using the unique dataset obtained within the course of the SAURON project, a radically new view of the structure, dynamics and stellar populations of early-type galaxies has emerged. We show that galaxies come in two broad flavours (slow and fast rotators), depending on whether or not they exhibit clear large-scale rotation, as indicated via a robust measure of the specific angular momentum of baryons. This property is also linked with other physical characteristics of early-type galaxies, such as: the presence of dynamically decoupled cores, orbital structure and anisotropy, stellar populations and dark matter content. I here report on the observed link between this baryonic angular momentum and a mass sequence, and how this uniquely relates to the building of the red sequence via dissipative/dissipationless mergers and secular evolution.

Keywords

galaxies: elliptical and lenticularcDgalaxies: evolutiongalaxies: stellar dynamics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S245: Formation and Evolution of Galaxy Bulges , July 2007 , pp. 11 - 14
Copyright
Copyright © International Astronomical Union 2008

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