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The dark halo in the elliptical galaxy NGC 3108

Published online by Cambridge University Press:  26 May 2016

Gyula I. G. Józsa ,
Thomas A. Oosterloo ,
Raffaella Morganti  and
Daniela Vergani
Gyula I. G. Józsa
Affiliation:
RAIUB, Auf dem Hügel 71, D-53121 Bonn, Germany
Thomas A. Oosterloo
Affiliation:
ASTRON, P.O. Box 2, 7990 AA Dwingeloo, the Netherlands
Raffaella Morganti
Affiliation:
ASTRON, P.O. Box 2, 7990 AA Dwingeloo, the Netherlands
Daniela Vergani
Affiliation:
Observatoire de Paris - Section de Meudon, 5, Place Jules Janssen, F-92195 Meudon Cedex, France

Abstract

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We investigate the properties of the dark halo of the dust-lane elliptical galaxy NGC 3108. This galaxy contains a large massive gaseous disk, which shows rapid and regular rotation. That makes NGC 3108 a target for measurements usually feasible only for spriral galaxies. Combining spectroscopic measurements of the disk in the optical- and the radio regime, we provide a reliable rotation curve of the galaxy out to 3 Reff and show that the rotation curve does not decline up to a radius of 5.5 Reff corresponding to 28 kpc.

Type
Part 5: Clusters and Ellipticals
Information
Symposium - International Astronomical Union , Volume 220: Dark Matter in Galaxies , 2004 , pp. 177 - 178
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

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García-Ruiz, I. 2001, PhD Thesis, Univ. Groningen.Google Scholar
Oosterloo, T. A., Morganti, R., Sadler, E., Vergani, D., Caldwell, N. 2002, AJ, 123, 729.Google Scholar