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The Globular Cluster System of NGC 1399: III. VLT Spectroscopy and Database

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arxiv astro-ph/0401218 v1 pith:PNBILQZK submitted 2004-01-12 astro-ph

B. Dirsch , T. Richtler , D. Geisler , K. Gebhardt , M. Hilker , M.V. Alonso , J.C. Forte , E.K. Grebel
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L. Infante S. Larsen D. Minniti M. Rejkuba
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keywords clusterglobularvelocitiessamplearoundgalaxylargeobtained
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Radial velocities of 468 globular clusters around NGC 1399, the central galaxy in the Fornax cluster, have been obtained with FORS2 and the Mask Exchange Unit (MXU) at the ESO Very Large Telescope. This is the largest sample of globular cluster velocities around any galaxy obtained so far. The mean velocity uncertainty is 50 km/sec. This data sample is accurate and large enough to be used in studies of the mass distribution of NGC 1399 and the properties of its globular cluster system. Here we describe the observations, the reduction procedure, and discuss the uncertainties of the resulting velocities. The complete sample of cluster velocities which is used in a dynamical study of NGC 1399 is tabulated. A subsample is compared with previously published values.

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  1. The Fornax Cluster VLT Spectroscopic Survey - V. Mass modelling of the BCG NGC 1399 out to 150 kpc

    astro-ph.GA 2026-08 conditional novelty 6.0 of 10

    Dynamical modeling of 1,640 globular clusters around NGC 1399 yields log M200 = 13.81 ± 0.09 for an NFW halo and shows that outer blue clusters are radially anisotropic, implying accretion.

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