Extended stellar kinematics of elliptical galaxies in the Fornax cluster (Downloadable archival material, 1998) [WorldCat.org]
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Extended stellar kinematics of elliptical galaxies in the Fornax cluster

Author: Graham, Alister; Colless, Matthew; Busarello, Giovanni; Zaggia, Simone; Longo, G.
Publisher: 1998-06-25
Edition/Format:   Downloadable archival material
Summary:
We present extended stellar kinematics for a sample of 13 elliptical galaxies in the Fornax cluster. Major-axis velocity dispersion profiles (VDPs) and rotation curves (RCs) are given for 12 of the galaxies. A major feature of this data is the spatial extension: for 8 galaxies the data extends beyond 1 R_e, and for 5 it extends beyond 2 R_e. Compared to the previously available data, this corresponds to an increase
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Genre/Form: text
Material Type: Internet resource
Document Type: Internet Resource, Archival Material
All Authors / Contributors: Graham, Alister; Colless, Matthew; Busarello, Giovanni; Zaggia, Simone; Longo, G.
OCLC Number: 691243549

Abstract:

We present extended stellar kinematics for a sample of 13 elliptical galaxies in the Fornax cluster. Major-axis velocity dispersion profiles (VDPs) and rotation curves (RCs) are given for 12 of the galaxies. A major feature of this data is the spatial extension: for 8 galaxies the data extends beyond 1 R_e, and for 5 it extends beyond 2 R_e. Compared to the previously available data, this corresponds to an increase in spatial coverage by a factor from 1 to 5. Five of the ellipticals in the sample turn out to be rotationally-supported systems, having positive rotation parameter log (V/sigma)*. One of these five, and another 3 galaxies from the remaining sample, display evidence for bar-like kinematics. The data indicate that the true number of `dynamically hot' stellar systems, is much lower than previously thought: of the Es in the present sample only 1/4 are confirmed as `pressure-supported' systems. The data reveal a host of individual peculiarities, like: wiggles, strong gradients, and asymmetries in the rotation curve and/or in the velocity dispersion profile, thus showing that the presence of kinematically distinct components and/or triaxiality is a common characteristic of this class of object.

Comment: 27 pages, includes 15 eps figures. Accepted for publication in A&A Supp

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