Homogeneous Photometry for Star Clusters and Resolved Galaxies. I. A Survey of Bright Stars in the Fornax Dwarf Spheroidal Galaxy
Homogeneous Photometry for Star Clusters and Resolved Galaxies. I. A Survey of Bright Stars in the Fornax Dwarf Spheroidal Galaxy
复制标题
星团和分辨星系的均匀光度测量。
DOI：
10.1086/316164
复制
发表时间：
1998
影响因子：
3.5
通讯作者：
T. Smecker
中科院分区：
文献类型：
--
作者：
P. Stetson;J. Hesser;T. Smecker
我们在约翰逊B，Kron-Einins R测光系统上为大约100，000颗恒星提供了精确的测光，这些恒星位于天炉座矮球状星系中心的1 / 3 deg 2区域。我们发现了许多可能的短周期变星，蓝色恒星似乎是一个小群体的主要序列，年龄约为108年，和两种不同类型的发光红色星星：一个主要是碳星的扩展序列和一群主要是M巨星，比巨型分支尖端稍微更明亮。被认为是在天炉座矮星系的空间分布，这些子群。
We present accurate photometry on the Johnson B, Kron‐Cousins R photometric system for approximately 100,000 stars in a 1 / 3 deg2 field centered on the dwarf spheroidal galaxy in Fornax. We identify numerous probable short‐period variable stars, blue stars that appear to be the main sequence of a small population with an age of order 108 yr, and two distinct types of luminous red star: an extended sequence of primarily carbon stars and a clump of mostly M giants slightly more luminous than the giant‐branch tip. The spatial distribution of each of these subpopulations within the Fornax dwarf galaxy is considered.