An updated survey of globular clusters in M 31. III. A spectroscopic metallicity scale for the Revised Bologna Catalog

Abstract

We present a new homogeneous set of metallicity estimates based on Lick indices for 245 old globular clusters of the M31 galaxy comprised in the Revised Bologna Catalog. The metallicity distribution of the M31 globular clusters is briefly discussed and compared with that of the Milky Way. Simple parametric statistics suggests that the [Fe/H] distribution is likely not unimodal. The strong correlation between metallicity and kinematics found in previous studies is confirmed. The most metal-rich GCs tend to be packed at the center of the system and share the galactic rotation as traced by the HI disk. Although the velocity dispersion around the curve increases with decreasing metallicity, also clusters with [Fe/H]<-1.0 display a clear rotational pattern, at odds with their Milky Way counterparts.

25 pages with 17 figures and 2 Appendices - To appear on Astronomy & Astrophysics

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• The deep XMM-Newton Survey of M 31
• Balancing mass and momentum in the Local Group
• MIUSCAT: extended MILES spectral coverage. II. Constraints from optical photometry
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• VEGAS-SSS II: Comparing the globular cluster systems in NGC3115 and NGC1399 using VEGAS and FDS survey data
• Star Clusters in M31: VII. Global Kinematics and Metallicity Subpopulations of the Globular Clusters
• Nonlinear Color-Metallicity Relations of Globular Clusters. III. On the Discrepancy in Metallicity between Globular Cluster Systems and their Parent Elliptical Galaxies
• The difference in metallicity distribution functions of halo stars and globular clusters as a function of galaxy type: A tracer of globular cluster formation and evolution
• Infrared High-Resolution Integrated Light Spectral Analyses of M31 Globular Clusters from APOGEE
• An updated catalog of M31 globular-like clusters: UBVRI photometry, ages, and masses
• Colors of Ellipticals from GALEX to Spitzer
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• The horizontal branch luminosity vs metallicity in M31 globular clusters
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• 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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• Chandra identification of 26 new black hole candidates in the central region of M31
• Around 200 new X-ray binary IDs from 13 years of Chandra observations of the M31 center
• The prolate dark matter halo of the Andromeda galaxy
• 50 M31 black hole candidates identified by Chandra and XMM-Newton
• Estimating ages and metallicities of M31 star clusters from LAMOST DR6
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• Reconciling the cosmic age problem in the R_h=ct Universe
• The Massive M31 Cluster G1: Detailed Chemical Abundances from Integrated Light Spectroscopy
• Spectroscopic Study of Globular Clusters in the Halo of M31 with Xinglong 2.16m Telescope
• Systematic differences in simple stellar population model results: Application to the M31 globular-like cluster system
• Does the Oosterhoff Dichotomy Exist in The Andromeda Galaxy? I. The case of G11
• Spectral Energy Distributions and Masses of 304 M31 Old Star Clusters
• Lick Indices and Spectral Energy Distribution Analysis based on an M31 Star Cluster Sample: Comparisons of Methods and Models
• Colors of Dwarf Ellipticals from GALEX to WISE
• Age and mass studies for young star clusters in M31 from SEDs-fit
• M31 globular cluster structures and the presence of X-ray binaries
• The Ages of M31 Star Clusters: Spectral Energy Distribution Versus Color-Magnitude Diagram
• Spectroscopic Study of Globular Clusters in the Halo of M31 with Xinglong 2.16m Telescope II: Dynamics, Metallicity and Age
• Structural Parameters for Globular Clusters in the Outer Halo of M31
• The Effects of the WISE/GALEX Photometry for the SED-Fitting with M31 Star Clusters and Candidates
• Swift reveals a ~5.7 day super-orbital period in the M31 globular cluster X-ray binary XB158
• XMM-Newton and Chandra observations of the M31 globular cluster black hole candidate XB135: a heavyweight contender cut down to size
• Observations of the recurrent M31 transient XMMU~J004215.8+411924 with Swift, Chandra, HST and Einstein
• A NuSTAR Census of the X-ray Binary Population of the M31 Disk