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

Eric Emsellem*, Michele Cappellari, Davor Krajnović, Glenn Van De Ven, R. Bacon, M. Bureau, Roger L. Davies, P. T. De Zeeuw, Jesús Falcón-Barroso, Harald Kuntschner, Richard M. McDermid, Reynier F. Peletier, Marc Sarzi, Remco C.E. Van Den Bosch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)11-14
Number of pages4
JournalProceedings of the International Astronomical Union
Issue numberS245
Publication statusPublished - Jul 2007
Externally publishedYes


  • CD
  • Galaxies: elliptical and lenticular
  • Galaxies: evolution
  • Galaxies: stellar dynamics


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