M31中77个新发现星团的光度星表
A Photometric Catalog of 77 Newly-recognized Star Clusters in M31
摘要：
本文介绍了HST WFPC 2在M31活跃的恒星形成区搜索星团的结果。其中9个星团以前被编目，77个是新的。我们的23个领域涵盖了银河系最近恒星形成活动的关键领域。我们提供了一个目录的位置和积分星等在四种颜色，采取了336 W，439 W，555 W和814 W过滤器与哈勃太空望远镜。未来的论文将讨论恒星测光的结果，在一些集群的六种颜色，包括两个额外的紫外线颜色（比安奇等2010）。星团的综合星等和颜色显示出一系列特征，但平均颜色比以前的调查更蓝，反映了我们的样本集中在活跃的恒星形成区域。绝对星等范围从M555 = -10.3到-3.5。观测到的光度函数显示出近似高斯分布，峰值在M555 = -5.4处，并且有一个异常明亮的星团肩部。我们仔细观察其中两个异常明亮的例子，星团45（C410）和星团10（BH 05）。C410位于明亮的HII区域的核心。它的绝对星等是M555 =-10.3。BH 05是一个类似的天体，绝对星等为M555 =-8.9。这两个星团是M31中最明亮的年轻星团之一。
英文摘要：
This paper describes the results of an HST WFPC2 search for star clusters in active star-formation regions of M31. Nine of the clusters were previously cataloged and 77 are new. Our 23 fields cover key areas of the galaxy's recent star formation activity. We provide a catalog of positions and integrated magnitudes in four colors, taken with the 336W, 439W, 555W and 814W filters with the Hubble Space Telescope. A future paper will discuss the results of stellar photometry in some of the clusters in six colors, including two additional uv colors (Bianchi et al. 2010). The integrated magnitudes and colors of the clusters show a range of characteristics, but the mean color is bluer than for previous surveys, reflecting the concentration of our sample on active star forming regions. Absolute magnitudes range from M555 = -10.3 to - 3.5. The observed luminosity function shows a nearly Gaussian distribution with a peak value at M555 = -5.4 and a shoulder of unusually-bright clusters. We look in detail at two of these unusually bright examples, cluster 45 (C410) and cluster 10 (BH05). C410 lies at the core of a bright HII region. Its absolute magnitude is M555 = -10.3. BH05 is a similar object, with an absolute magnitude of M555 = -8.9. These two clusters are among the most luminous young clusters in M31.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
