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

  • Eric Emsellem (a1), Michele Cappellari (a2) (a3), Davor Krajnović (a3), Glenn van de Ven (a2) (a4) (a5), R. Bacon (a1), M. Bureau (a3), Roger L. Davies (a3), P. T. de Zeeuw (a2), Jesús Falcón-Barroso (a2) (a6), Harald Kuntschner (a7), Richard M. McDermid (a2), Reynier F. Peletier (a8), Marc Sarzi (a9) and Remco C. E. van den Bosch (a2)...

Abstract

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.

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References

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

  • Eric Emsellem (a1), Michele Cappellari (a2) (a3), Davor Krajnović (a3), Glenn van de Ven (a2) (a4) (a5), R. Bacon (a1), M. Bureau (a3), Roger L. Davies (a3), P. T. de Zeeuw (a2), Jesús Falcón-Barroso (a2) (a6), Harald Kuntschner (a7), Richard M. McDermid (a2), Reynier F. Peletier (a8), Marc Sarzi (a9) and Remco C. E. van den Bosch (a2)...

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