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A SAURON View of Galaxies

  • Ellen K. Verolme
  • Michele Cappellari
  • Glenn van de Ven
  • P. Tim de Zeeuw
  • Roland Bacon
  • Martin Bureau
  • Yanick Copin
  • Roger L. Davies
  • Eric Emsellem
  • Harald Kuntschner
  • Richard McDermid
  • Bryan W. Miller
  • Reynier F. Peletier
Chapter
Part of the Lecture Notes in Physics book series (LNP, volume 626)

Abstract

We have measured the two-dimensional kinematics and line-strength distributions of 72 representative nearby early-type galaxies, out to approximately one effective radius, with our panoramic integral-field spectrograph SAURON. The resulting maps reveal a rich variety in kinematical structures and linestrength distributions, indicating that early-type galaxies are more complex systems than often assumed. We are building detailed dynamical models for these galaxies, to derive their intrinsic shape and dynamical structure, and to determine the mass of the supermassive central black hole. Here we focus on two examples, the compact elliptical M32 and the E3 galaxy NGC4365. These objects represent two extreme cases: M32 has very regular kinematics which can be represented accurately by an axisymmetric model in which all stars rotate around the short axis, while NGC4365 is a triaxial galaxy with a prominent kinematically decoupled core, with an inner core that rotates about an axis that is nearly perpendicular to the rotation axis of the main body of the galaxy. Our dynamical models for these objects demonstrate that two-dimensional observations are essential for deriving the intrinsic orbital structure and dark matter content of galaxies.

Keywords

Chaotic Orbit Central Black Hole Intrinsic Shape Globular Cluster System Surface Brightness Distribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Ellen K. Verolme
    • 1
  • Michele Cappellari
    • 1
  • Glenn van de Ven
    • 1
  • P. Tim de Zeeuw
    • 1
  • Roland Bacon
    • 2
  • Martin Bureau
    • 3
  • Yanick Copin
    • 4
  • Roger L. Davies
    • 5
  • Eric Emsellem
    • 2
  • Harald Kuntschner
    • 6
  • Richard McDermid
    • 1
  • Bryan W. Miller
    • 7
  • Reynier F. Peletier
    • 8
  1. 1.Sterrewacht LeidenLeidenThe Netherlands
  2. 2.Saint-Genis-LavalCentre de Recherche Astronomique de LyonLyonFrance
  3. 3.Department of AstronomyColumbia UniversityNew YorkUSA
  4. 4.Institut de Physique Nucléaire de LyonVilleurbanneFrance
  5. 5.Physics DepartmentUniversity of OxfordOxfordUK
  6. 6.European Southern ObservatoryGarchingGermany
  7. 7.Gemini ObservatoryLa SerenaChile
  8. 8.Department of Physics and AstronomyUniversity of NottinghamNottinghamUK

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