Published January 1, 2011 | Version v1
Journal article Metadata-only

STAR CLUSTERS IN M31: OLD CLUSTERS WITH BAR KINEMATICS

Creators

  • 1. Department of Astronomy, Case Western Reserve University, Cleveland, OH 44106-7215 (United States)
  • 2. Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
  • 3. Gemini Observatory, 670 N. A'ohoku Place, Hilo, HI 96720 (United States)
  • 4. LAM/OAMP, UMR6110, CNRS/Univ. de Provence, 38 rue Joliot Curie, 13388 Marseille 13 (France)
  • 5. UCO/Lick Observatory, University of California, Santa Cruz, CA 95064 (United States)

Description

We analyze our accurate kinematical data for the old clusters in the inner regions of M31. These velocities are based on high signal-to-noise Hectospec data. The data are well suited for analysis of M31's inner regions because we took particular care to correct for contamination by unresolved field stars from the disk and bulge in the fibers. The metal-poor clusters show kinematics that are compatible with a pressure-supported spheroid. The kinematics of metal-rich clusters, however, argue for a disk population. In particular the innermost region (inside 2 kpc) shows the kinematics of the x2 family of bar periodic orbits, arguing for the existence of an inner Lindblad resonance in M31.

Availability note (English)

Available from http://dx.doi.org/10.1088/2041-8205/726/1/L9

Additional details

Identifiers

DOI
10.1088/2041-8205/726/1/L9;

Publishing Information

Journal Title
Astrophysical Journal Letters
Journal Volume
726
Journal Issue
1
Journal Page Range
[4 p.]
ISSN
2041-8205

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
43038128
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
GALAXIES; STAR CLUSTERS; VELOCITY