共 50 条
STELLAR POPULATIONS IN M31 - RESOLVED V,I-PHOTOMETRY OF 5 HALO GLOBULAR-CLUSTERS AND SURROUNDING FIELDS
被引:22
|作者:
COUTURE, J
RACINE, R
HARRIS, WE
HOLLAND, S
机构:
[1] OBSERV ASTRON MT MEGANTIC,ST FOY,PQ G1K 7P4,CANADA
[2] MCMASTER UNIV,DEPT PHYS & ASTRON,HAMILTON,ON L8S 4M1,CANADA
[3] UNIV MONTREAL,DEPT PHYS,MONTREAL,PQ H3C 3J7,CANADA
关键词:
D O I:
10.1086/117430
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
We present V,I CCD photometry of individual stars in five halo globular clusters in M31. For four clusters, the CMD shows a well-defined giant branch whose morphology is consistent with the metallicity estimates from spectroscopy of the clusters integrated light. An area of ∼10 square arcmin of the halo of M31 has also been analyzed. The mean halo metallicity is [Fe/H]∼-0.5 with a large dispersion σ[Fe/H] ∼ .5 dex. The distance modulus has also been estimated as (m-M)0=24.5±0.2, close to the more usual value of (m-M)0∼24.3.
引用
收藏
页码:2050 / 2060
页数:11
相关论文