The stellar populations of E and S0 galaxies as seen with SAURON

H. Kuntschner*, E. Emsellem, R. Bacon, M. Bureau, M. Cappellari, R. L. Davies, T. Zeeuw, J. Falcón-barroso, D. Krajnović, R. M. McDermid, R. F. Peletier, M. Sarzi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

Abstract

We present selected results from integral-field spectroscopy of 48 earlytype galaxies observed as part of the SAURON survey. Maps of the Hβ Fe5015, Mg b and Fe5270 indices in the Lick/IDS system were derived for each of the survey galaxies. The metal line strength maps show generally negative gradients with increasing radius roughly consistent with the morphology of the light profiles. Remarkable deviations from this general trend exist, particularly the Mg b isoindex contours appear to be flatter than the isophotes of the surface brightness for about 40% of our galaxies without significant dust features. Generally these galaxies exhibit significant rotation. We infer from this that the fast-rotating component features a higher metallicity and/or an increased Mg/Fe ratio, as compared to the galaxy as a whole. We also use the line strength maps to compute average values integrated over circular apertures of one effective radius, and derive luminosity weighted ages and metallicities. The lenticular galaxies show a wide range in age and metallicity estimates, while elliptical galaxies tend to occupy regions of older stellar populations.

Original languageEnglish
Title of host publicationScience Perspectives for 3D Spectroscopy Proceedings of the ESO Workshop held in Garching, Germany, 10-14 October 2005
Place of PublicationBerlin; Heidelberg
PublisherSpringer, Springer Nature
Pages123-128
Number of pages6
Volume2007
ISBN (Print)9783540734901
DOIs
Publication statusPublished - 2007
Externally publishedYes

Publication series

NameESO Astrophysics Symposia
Volume2007
ISSN (Print)14312433
ISSN (Electronic)16116143

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