STRUCTURAL PARAMETERS FOR GLOBULAR CLUSTERS IN THE OUTER HALO OF M31
Abstrak
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 Hubble Space Telescope, for 10 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 the 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 Eb with mass Mmod indicates that the “fundamental plane” does exist for clusters, regardless of their host environments, which is consistent with previous studies.
Topik & Kata Kunci
Penulis (9)
Song-Yun Wang
J. M. N. A. Observatories
Chinese Academy of Sciences
G. S. O. Sciences
Shijingshan District
Beijing
China.
Key Laboratory of Optical Astronomy
National Astronomical Observatories
Akses Cepat
- Tahun Terbit
- 2012
- Bahasa
- en
- Total Sitasi
- 3×
- Sumber Database
- Semantic Scholar
- DOI
- 10.1088/0004-6256/143/6/132
- Akses
- Open Access ✓