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J/ApJ/709/377 The globular cluster system of NGC 4636 (Park+, 2010)
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Beginning of ReadMe :J/ApJ/709/377 The globular cluster system of NGC 4636 (Park+, 2010)
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The globular cluster system of the Virgo giant elliptical galaxy NGC 4636.
I. Subaru/Faint Object Camera and Spectrograph spectroscopy and database.
Park H.S., Lee M.G., Hwang H.S., Arimoto N., Tamura N., Onodera M.
<Astrophys. J., 709, 377-385 (2010)>
=2010ApJ...709..377P
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ADC_Keywords: Galaxies, photometry ; Clusters, globular ; Radial velocities ;
Cross identifications
Keywords: galaxies: clusters: general - galaxies: individual (NGC 4636) -
galaxies: kinematics and dynamics - galaxies: star clusters: general
Abstract:
We present a spectroscopic study of the globular clusters (GCs) in the
giant elliptical galaxy NGC 4636 in the Virgo Cluster. We selected
target GC candidates using the Washington photometry derived from the
deep CCD images taken at the KPNO 4m Telescope. Then we obtained the
spectra of 164 target objects in the field of NGC 4636 using the
Multi-Object Spectroscopy mode of Faint Object Camera and Spectrograph
on the Subaru 8.2m Telescope. We have measured the velocities for 122
objects: 105 GCs in NGC 4636, the nucleus of NGC 4636, 11 foreground
stars, two background galaxies, and three probable intracluster GCs in
the Virgo Cluster. The GCs in NGC 4636 are located in the projected
galactocentric radius within 10' (corresponding to 43kpc). The
measured velocities for the GCs range from 300km/s to 1600km/s, with
a mean value of 932^+25^_-22_km/s, which is in good agreement with the
velocity for the nucleus of NGC 4636, 928+/-45km/s.
Description:
Spectroscopic data of 168 targets were obtained using the Multi-Object
Spectrography (MOS) mode of Faint Object Camera and Spectrograph
(FOCAS) at the Subaru 8.2m Telescope on 2002 April 20 and 21.