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Spectroscopy of Globular Clusters in NGC 1399 - A Progress Report

Published online by Cambridge University Press:  03 August 2017

T. Richtler ,
B. Dirsch ,
D. Geisler ,
K. Gebhardt ,
M. Hilker ,
L. Infante ,
D. Minniti ,
M. Rejkuba ,
J. C. Forte  and
S. Larsen
...Show all authors
T. Richtler
Affiliation:
Grupo de Astronomía, Departamento de Física, Universidad de Concepción, Casilla 160- C, Conceptión, Chile
B. Dirsch
Affiliation:
Grupo de Astronomía, Departamento de Física, Universidad de Concepción, Casilla 160- C, Conceptión, Chile
D. Geisler
Affiliation:
Grupo de Astronomía, Departamento de Física, Universidad de Concepción, Casilla 160- C, Conceptión, Chile
K. Gebhardt
Affiliation:
Department of Astronomy, University of Texas at Austin, USA
M. Hilker
Affiliation:
Departamento de Astronomía y Astrofísica, P. Universidad Católica, Vicuña Mackenna 4860, Santiago 22, Chile
L. Infante
Affiliation:
Departamento de Astronomía y Astrofísica, P. Universidad Católica, Vicuña Mackenna 4860, Santiago 22, Chile
D. Minniti
Affiliation:
Departamento de Astronomía y Astrofísica, P. Universidad Católica, Vicuña Mackenna 4860, Santiago 22, Chile
M. Rejkuba
Affiliation:
Departamento de Astronomía y Astrofísica, P. Universidad Católica, Vicuña Mackenna 4860, Santiago 22, Chile
J. C. Forte
Affiliation:
Facultad de Ciencias Astronomicas y Geofísicas, Universidad Nacional de La Plata, 1900 La Plata, Argentina
S. Larsen
Affiliation:
Lick Observatory, University of California at Santa Cruz, USA
E. K. Grebel
Affiliation:
MPI für Astronomie, Königstuhl 17, D-69117, Heidelberg, Germany
V. Alonso
Affiliation:
Observatorio Astronomico Cordoba, Laprida 854, 5000 Cordoba, Argentina

Abstract

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We performed spectroscopy of globular clusters associated with NGC 1399 and measured radial velocities of about 450 clusters, the largest sample ever obtained for dynamical studies. In this progress report, we present the sample and the first preliminary results. Red and blue clusters have slightly different velocity dispersions in accordance with their different density profiles in the case of a spherical and isotropic model. We then measure a constant circular velocity of 422 ± 20 km/s, which agrees well with that of the inner luminous component.

Type
Part 2. Globular Cluster Systems of Distant Galaxies
Information
Symposium - International Astronomical Union , Volume 207: Extragalactic Star Clusters , 2002 , pp. 263 - 268
Copyright
Copyright © Astronomical Society of the Pacific 2002 

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