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J/AJ/139/1871 Kinematics of GCs in NGC 5128 (Woodley+, 2010)
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Beginning of ReadMe :J/AJ/139/1871 Kinematics of globulars in NGC 5128 (Woodley+, 2010)
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The kinematics of the globular cluster system of NGC 5128 with a new large
sample of radial velocity measurements.
Woodley K.A., Gomez M., Harris W.E., Geisler D., Harris G.L.H.
<Astron. J., 139, 1871-1888 (2010)>
=2010AJ....139.1871W
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ADC_Keywords: Clusters, globular ; Radial velocities ; Galaxies, nearby
Keywords: catalogs - galaxies: elliptical and lenticular, cD - galaxies:
individual (NGC 5128) - galaxies: kinematics and dynamics - galaxies:
star clusters: general - globular clusters: general -
planetary nebulae: general
Abstract:
New radial velocity measurements for previously known and newly
confirmed globular clusters (GCs) in the nearby massive galaxy
NGC 5128 are presented. We have obtained spectroscopy from
LDSS-2/Magellan, VIMOS/Very Large Telescope, and HYDRA/Cerro Tololo
Inter-American Observatory from which we have measured the radial
velocities of 218 known, and identified 155 new, GCs. The current
sample of confirmed GCs in NGC 5128 is now 605 with 563 of these
having radial velocity measurements, the second largest kinematic
database for any galaxy. We have performed a new kinematic analysis of
the GC system that extends out to 45' in galactocentric radius. We
have examined the systemic velocity, projected rotation amplitude and
axis, and the projected velocity dispersion of the GCs as functions of
galactocentric distance and metallicity.
Description:
We obtained multi-object slit spectroscopy with the spectrograph-2
(LDSS-2) on the Baade/Magellan 6.5m telescope at the Las Campanas
Observatory in Chile. We observed 12 fields scattered around the
central regions of NGC 5128 on 2002 May 9-10 (PI: D. Geisler) with the
6' field of view of LDSS-2.
We obtained spectroscopy with the VIMOS MOS/Very Large Telescope (VLT)
8m telescope in 2007 (PI: M. Gomez, Program ID 079.D-0539), on
Paranal, Chile.
We obtained spectroscopy from the HYDRA Spectrograph on the Cerro
Tololo Inter-American Observatory (CTIO) Blanco 4m telescope, in
Chile (PI: W. Harris, Program ID 2007A-0070). We observed from 2007
April 7 to April 10 and had 2.5 usable nights of data.