Structural Parameters for Globular Clusters in the Outer Halo of M31
arXiv:1203.5588 · doi:10.1088/0004-6256/143/6/132
Abstract
In this paper, we present internal surface brightness profiles, using images in the F606W and F814W filter bands observed with the Advanced Camera for Surveys on the {\it Hubble Space Telescope}, for ten globular clusters (GCs) in the outer halo of M31. Standard King models are fitted to the profiles to derive their structural and dynamical parameters. The results show that, in general, the properties of clusters in M31 and the Milky Way fall in the same regions of parameter spaces. The outer halo GCs of M31 have larger ellipticities than most of GCs in M31 and the Milky Way. Their large ellipticities may be due to galaxy tides coming from satellite dwarf galaxies of M31 or may be related to the apparently more vigorous accretion or merger history that M31 has experienced. The tight correlation of cluster binding energy with mass indicates that, the "fundamental plane" does exist for clusters, regardless of their host environments, which is consistent with previous studies.
Accepted for Publication in AJ, 15 pages, 7 figures and 5 tables
References in corpus (19)
- The Haunted Halos of Andromeda and Triangulum: A panorama of galaxy formation in action
- Discovery and analysis of three faint dwarf galaxies and a globular cluster in the outer halo of the Andromeda galaxy
- Evidence for an accretion origin for the outer halo globular cluster system of M31
- Structural parameters for globular clusters in M31 and generalizations for the fundamental plane
- Does M31 result from an ancient major merger?
- An updated survey of globular clusters in M31. II Newly discovered bright and remote clusters
- ACS photometry of extended, luminous globular clusters in the outskirts of M31
- Globular clusters in the outer halo of M31: the survey
- An updated survey of globular clusters in M 31. I. Classification and radial velocity for 76 candidate clusters
- Exploring the Properties of the M31 Halo Globular Cluster System
- ACS photometry of newly-discovered globular clusters in the outer halo of M31
- Structural parameters for globular clusters in NGC 5128. III. ACS surface-brightness profiles and model fits
- Spectral Energy Distributions and Age Estimates of 39 Globular Clusters in M31
- Structural Parameters of Mayall II = G1 in M31
- New age estimates of M31 globular clusters from multi-colour photometry
- The extended structure of the remote cluster B514 in M31. Detection of extra-tidal stars
- Age and structure parameters of a remote M31 globular cluster B514 based on HST, 2MASS, GALEX and BATC observations
- Age and mass constraints for a young massive cluster in M31 based on spectral-energy-distribution fitting
- Detailed study of B037 based on {\sl HST} images