SIMBAD references

2009MNRAS.395L..34A - Mon. Not. R. Astron. Soc., 395, L34-L38 (2009/May-1)

The outer halo globular clusters of M31.

ALVES-BRITO A., FORBES D.A., MENDEL J.T., HAU G.K.T. and MURPHY M.T.

Abstract (from CDS):

We present Keck/HIRES spectra of three globular clusters in the outer halo of M31, at projected distances beyond ~80 kpc from M31. The measured recession velocities for all three globular clusters confirm their association with the globular cluster system of M31. We find evidence for a declining velocity dispersion with radius for the globular cluster system. Their measured internal velocity dispersions, derived virial masses and mass-to-light ratios are consistent with those for the bulk of the M31 globular cluster system. We derive old ages and metallicities which indicate that all three belong to the metal-poor halo globular cluster subpopulation. We find indications that the radial gradient of the mean metallicity of the globular cluster system interior to 50 kpc flattens in the outer regions, however it is still more metal-poor than the corresponding field stars at the same (projected) radius.

Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): globular clusters: general - galaxies: individual: M31 - galaxies: star clusters

Simbad objects: 11

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2009MNRAS.395L..34A and select 'bookmark this link' or equivalent in the popup menu


2021.02.27-23:30:39

© Université de Strasbourg/CNRS

    • Contact