Star clusters in M31. VII. Globular clusters RVs Virtual Observatory Resource

Authors
  1. Caldwell N.
  2. Romanowsky A.J.
  3. Published by
    CDS
Abstract

We carry out a joint spatial-kinematical-metallicity analysis of globular clusters (GCs) around the Andromeda Galaxy (M31), using a homogeneous, high-quality spectroscopic data set. In particular, we remove the contaminating young clusters that have plagued many previous analyses. We find that the clusters can be divided into three major metallicity groups based on their radial distributions: (1) an inner metal-rich group ([Fe/H]>-0.4); (2) a group with intermediate metallicity (with median [Fe/H]=-1); and (3) a metal-poor group, with [Fe/H]. The metal-rich group has kinematics and spatial properties like those of the disk of M31, while the two more metal-poor groups show mild prograde rotation overall, with larger dispersions --in contrast to previous claims of stronger rotation. The metal-poor GCs are the least concentrated group; such clusters occur five times less frequently in the central bulge than do clusters of higher metallicity. Despite some well-known differences between the M31 and Milky Way GC systems, our revised analysis points to remarkable similarities in their chemodynamical properties, which could help elucidate the different formation stages of galaxies and their GCs. In particular, the M31 results motivate further exploration of a metal-rich GC formation mode in situ, within high-redshift, clumpy galactic disks.

Keywords
  1. globular-star-clusters
  2. radial-velocity
  3. metallicity
  4. galaxies
Bibliographic source Bibcode
2016ApJ...824...42C
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/824/42
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/824/42
Document Object Identifer DOI
doi:10.26093/cds/vizier.18240042

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/824/42
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/824/42
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/824/42
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/824/42/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/824/42/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/824/42/table1?

History

2016-09-26T09:49:21Z
Resource record created
2016-09-26T09:49:21Z
Created
2018-10-18T15:34:36Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr