A SAURON view of galaxies

E. K. Verolme, Michele Cappellari, Glenn van de Ven, P. T. Zeeuw, Roland Bacon, Martin Bureau, Y. Copin, R. L. Davies, Eric Emsellem, Harald Kuntschner, R McDermid, BW Miller, Reynier F. Peletier

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

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.

Original languageEnglish
Title of host publicationGalaxies and chaos
EditorsGeorge Contopoulos, Nikos Voglis
Place of PublicationBerlin, Heidelberg
PublisherSpringer, Springer Nature
Pages279-285
Number of pages7
Volume626
ISBN (Print)3540404708, 9783540404705
DOIs
Publication statusPublished - 2003
Externally publishedYes
EventInternational Workshop on Galaxies and Chaos - ATHENS, Greece
Duration: 16 Sep 200219 Sep 2002

Publication series

NameLECTURE NOTES IN PHYSICS
PublisherSPRINGER-VERLAG BERLIN
Volume626
ISSN (Print)0075-8450

Conference

ConferenceInternational Workshop on Galaxies and Chaos
CountryGreece
CityATHENS
Period16/09/0219/09/02

Keywords

  • BLACK-HOLE MASS
  • ELLIPTIC GALAXIES
  • TRIAXIAL GALAXIES
  • INTRINSIC SHAPES
  • MODELS
  • NGC-4365
  • M32
  • SYSTEMS

Cite this