The Globular Cluster System of M60 (NGC 4649). I. CFHT MOS Spectroscopy and Database

Abstract

We present the measurement of radial velocities for globular clusters in M60, giant elliptical galaxy in the Virgo cluster. Target globular cluster candidates were selected using the Washington photometry based on the deep $16\arcmin \times 16\arcmin$ images taken at the KPNO 4m and using the $VI$ photometry derived from the HST/WFPC2 archive images. The spectra of the target objects were obtained using the Multi-Object Spectrograph (MOS) at the Canada-France-Hawaii Telescope (CFHT). We have measured the radial velocity for 111 objects in the field of M60: 93 globular clusters (72 blue globular clusters with $1.0\le (C-T_1)<1.7$ and 21 red globular clusters with $1.7\le (C-T_1)<2.4$), 11 foreground stars, 6 small galaxies, and the nucleus of M60. The measured velocities of the 93 globular clusters range from $\sim 500$ km s${}^{-1}$ to $\sim 1600$ km s${}^{-1}$, with a mean value of $1070_{-25}^{+27}$ km s${}^{-1}$, which is in good agreement with the velocity of the nucleus of M60 ($v_{\mathrm{gal}}=1056$ km s${}^{-1}$). Combining our results with data in the literature, we present a master catalog of radial velocities for 121 globular clusters in M60. The velocity dispersion of the globular clusters in the master catalog is found to be $234_{-14}^{+13}$ km s${}^{-1}$ for the entire sample, $223_{-16}^{+13}$ km s${}^{-1}$ for 83 blue globular clusters, and $258_{-31}^{+21}$ km s${}^{-1}$ for 38 red globular clusters.

arXiv comment29 pages, 8 figures. To appear in ApJ

References in corpus (36)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Extragalactic Globular Clusters and Galaxy Formation
• The ACS Virgo Cluster Survey. XIII. SBF Distance Catalog and the Three-Dimensional Structure of the Virgo Cluster
• Detecting Bimodality in Astronomical Datasets
• The ACS Virgo Cluster Survey IX: The Color Distributions of Globular Cluster Systems in Early-Type Galaxies
• Properties of Globular Cluster Systems in Nearby Early-type Galaxies
• New Insights from HST Studies of Globular Cluster Systems I: Colors, Distances and Specific Frequencies of 28 Elliptical Galaxies
• Dynamics of the Globular Cluster System Associated with M87 (NGC 4486). II. Analysis
• Dynamics of the Globular Cluster System Associated with M49 (NGC4472): Cluster Orbital Properties and the Distribution of Dark Matter
• The Halo Stars in NGC 5128. III: An Inner-Halo Field and the Metallicity Distribution
• Globular Clusters in Virgo Ellipticals: Unexpected Results for Giants, Dwarfs, and Nuclei from ACS Imaging
• Keck Spectroscopy of Globular Clusters around NGC 1399
• The Globular Cluster System of NGC 5128 II. Ages, Metallicities, Kinematics, and Formation
• Kinematics of Ten Early-Type Galaxies from HST and Ground-Based Spectroscopy
• An Atlas of Halpha and R Images and Radial Profiles of 63 Bright Virgo Cluster Spiral Galaxies
• The Globular Cluster System of NGC 1399. II. Kinematics of a Large Sample of Globular Clusters
• Low Mass X-ray Binaries and Globular Clusters in Early-Type Galaxies
• The ACS Virgo Cluster Survey. XIV. Analysis of Color-Magnitude Relations in Globular Cluster Systems
• The Dynamics of the M87 Globular Cluster System
• Low Mass X-ray Binaries in 6 Elliptical Galaxies: Connection to Globular Clusters
• The Ages and Abundances of a Sample of Globular Clusters in M49 (NGC 4472)
• Dynamical Constraints on the Formation of NGC 4472 and Its Globular Clusters
• The Globular Cluster System of NGC 5128 I. Survey and Catalogs
• The Kinematics and Dynamics of the Globular Clusters and the Planetary Nebulae of NGC 5128
• Radial Velocities of Globular Clusters in the Giant Elliptical Galaxy NGC 1399
• Towards an Understanding of the Globular Cluster Over--abundance around the Central Giant Elliptical NGC 1399
• Chandra Observation of Diffuse Gas and LMXBs in the Elliptical Galaxy NGC 4649 (M60)
• The Spin of M87 as measured from the Rotation of its Globular Clusters
• The Globular Cluster Kinematics and Galaxy Dark Matter Content of NGC 4649 (M60)
• The Globular Cluster System of M60 (NGC 4649). II. Kinematics of the Globular Cluster System
• Dynamics of the NGC 4636 Globular Cluster System - An extremely dark matter dominated galaxy?
• Gemini/GMOS Imaging of Globular Clusters in the Virgo Galaxy NGC 4649 (M60)
• Gemini/GMOS Spectra of Globular Clusters in the Virgo Giant Elliptical NGC 4649
• Blue Horizontal Branch Stars in M92
• XMM-Newton Observation of Diffuse Gas and LMXBs in the Elliptical Galaxy NGC 4649 (M60)
• On the Formation of Giant Elliptical Galaxies and Globular Clusters

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• Deep Chandra Monitoring Observations of NGC 4649: II. Wide-Field Hubble Space Telescope Imaging of the Globular Clusters
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• A SLUGGS and Gemini/GMOS combined study of the elliptical galaxy M60: wide-field photometry and kinematics of the globular cluster system
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• The Globular Cluster System of NGC 4636 and Formation of Globular Clusters in Giant Elliptical Galaxies
• Nonlinear Color-Metallicity Relations of Globular Clusters. V. Nonlinear Absorption-line Index versus Metallicity Relations and Bimodal Index Distributions of M31 Globular Clusters
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• SUBARU Spectroscopy of the Globular Clusters in the Virgo Giant Elliptical Galaxy M86
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• Nonlinear Color-Metallicity Relations of Globular Clusters. IX. Different Radial Number Density Profiles between Blue and Red Clusters
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