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标题：Kinematics of the Outer Cluster System of NGC 1399
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作者：Y. Schuberth ; T. Richtler ; B. Dirsch 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2004
卷号：2004
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present preliminary results of our dynamical study of the outer globular cluster system of NGC 1399, the central galaxy in the Fornax cluster. About 160 new radial velocities for globular clusters at projected galactocentric distances between 80 and 180 indicate that the constant velocity dispersion of 276kms−1 (for all clusters) already found for the inner region can be traced out to 80 kpc. We find that the kinematical properties of the blue (metal-poor) and the red (metal-rich) globular cluster subpopulations appear to be different: While the velocity distribution of the red clusters is symmetric with respect to the systemic velocity of NGC 1399, the blue clusters show a somewhat asymmetric distribution, with more velocities above the systemic velocity.