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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 308815.0, MPI für Astronomie / Publikationen_mpia
Dark matter in the central regions of early type galaxies
Authors:Cappellari, M.; Bacon, R.; Bureau, M.; Damen, M. C.; Davies, R. L.; de Zeeuw, P. T.; Emsellem, E.; Falcón-Barroso, J.; Krajnovic, D.; Kuntschner, H.; McDermid, R. M.; Peletier, R. F.; Sarzi, M.; van den Bosch, R. C. E.; van de Ven, G.
Publisher:EDP Sciences
Date of Publication (YYYY-MM-DD):2006
Title of Proceedings:Mass Profiles and Shapes of Cosmological Structures
Start Page:127
End Page:130
Title of Series:EAS Publications Series
Volume (in Series):20
Audience:Not Specified
Abstract / Description:We investigate the well-known correlations between the dynamical mass-to-light ratio M/L and other global observables of elliptical (E) and lenticular (S0) galaxies. We construct two-integral Jeans and three-integral Schwarzschild dynamical models for a sample of 25 E/S0 galaxies with SAURON integral-field stellar kinematics to about one effective (half-light) radius R_e. The comparison of the dynamical M/L with the (M/L)_pop inferred from the analysis of the stellar population, indicates that dark matter in early-type galaxies contributes ~30% of the total mass inside one R_e, in agreement with previous studies, with significant variations from galaxy to galaxy. Our results suggest a variation in M/L at constant (M/L)_pop, which seems to be linked to the galaxy dynamics. We speculate that fast rotating galaxies have lower dark matter fractions than the slow rotating and generally more massive ones.
Comment of the Author/Creator:Date: 2006, January 1, 2006
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
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