Two-dimensional kinematics and stellar populations of early-type galaxies

first results from the SAURON survey

Roland Bacon, Martin Bureau, Michele Cappellari, Y. Copin, R. L. Davies, Eric Emsellem, Harald Kuntschner, R McDermid, Bryan W Miller, Reynier F. Peletier, E. K. Verolme, T. Zeeuw

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

Abstract

We present the SAURON project, which is aimed at studying the morphology, two-dimensional kinematics and stellar populations of a representative sample of elliptical galaxies and spiral bulges.

SAURON, a dedicated integral-field spectrograph that is optimized for observations and has high throughput, was built in Lyon and is now operated at the WHT 4.2m telescope. At present, we have ob served approximately two thirds of the seventy-two sample galaxies with SAURON. A comparison with published long-slit measurements demonstrates that the SAURON-data are of equal or better quality, and provides full two-dimensional coverage. The velocity and velocity dispersion fields exhibit a large variety of morphologies: from simple rotating systems to cylindrical, disky and triaxial velocity fields, bars and decoupled cores. Most of these kinematical signatures do not have counterparts in the light distribution. While some galaxies are consistent with axisymmetry, most Are more complex systems than assumed previously. This suggests that the kinematical properties of nearby E/S0 galaxies do not agree with the often assumed simplistic two-family model, in which the giant non-rotating triaxial ellipticals are opposed to the fast-rotating axisymmetric faint ellipticals and S0s.

Original languageEnglish
Title of host publicationGalaxies
Subtitle of host publicationthe third dimension
EditorsMargarita Rosado, Luc Binnette, Lorena Arias
Place of PublicationSan Francisco
PublisherASTRONOMICAL SOC PACIFIC
Pages179-188
Number of pages10
Volume282
ISBN (Print)1-58381-125-7, 978-1-58381-617-2
Publication statusPublished - 2002
Externally publishedYes
Event3rd Conference on Galaxies - Third Dimension - Cozumel, Mexico
Duration: 3 Dec 20017 Dec 2001

Publication series

NameASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES
PublisherASTRONOMICAL SOC PACIFIC
Volume282

Conference

Conference3rd Conference on Galaxies - Third Dimension
CountryMexico
CityCozumel
Period3/12/017/12/01

Keywords

  • INTEGRAL-FIELD SPECTROGRAPH
  • BLACK-HOLE
  • MODELS
  • EQUILIBRIUM

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