PHAT STELLAR CLUSTER SURVEY. I. YEAR 1 CATALOG AND INTEGRATED PHOTOMETRY
PHAT STELLAR CLUSTER SURVEY. I. YEAR 1 CATALOG AND INTEGRATED PHOTOMETRY
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DOI：
10.1088/0004-637x/752/2/95
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发表时间：
2012-04
期刊：
影响因子：
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通讯作者：
L. Johnson;A. Seth;J. Dalcanton;N. Caldwell;M. Fouesneau;D. Gouliermis;P. Hodge;S. Larsen;K. Olsen;I. San Roman;A. Sarajedini;D. Weisz;B. Williams;L. Beerman;L. Bianchi;A. Dolphin;L. Girardi;P. Guhathakurta;J. Kalirai;D. Lang;A. Monachesi;S. Nanda;H. Rix;E. Skillman
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文献类型：
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作者：
L. Johnson;A. Seth;J. Dalcanton;N. Caldwell;M. Fouesneau;D. Gouliermis;P. Hodge;S. Larsen;K. Olsen;I. San Roman;A. Sarajedini;D. Weisz;B. Williams;L. Beerman;L. Bianchi;A. Dolphin;L. Girardi;P. Guhathakurta;J. Kalirai;D. Lang;A. Monachesi;S. Nanda;H. Rix;E. Skillman
全色哈勃仙女座宝库（PHAT）巡天是一项正在进行的哈勃太空望远镜（HST）多周期计划，目的是在紫外到近红外波段获得M31圆盘三分之一的高空间分辨率成像。在本文中，我们提出了第一期的PHAT星团目录。一旦完成，PHAT星团目录将是所有星系中最大和最全面的已分解星团调查之一。HST获得的精确空间分辨率使我们能够识别出数百个新的星团，而这些星团以前是用现有的地面调查无法识别的。我们在第一年的样本中确定了601个集群，比当前调查区域内以前的目录（390 arcmin2）增加了四倍以上。这项工作提出了来自前25%的调查数据的结果；我们估计最终样本将包括~ 2500个簇。对于第一年的天体，我们给出了一个包含位置、半径和六波段综合光度的目录。随着星团光度和颜色的一般特征，我们讨论了星团光度函数，星团大小分布，并强调了在第一年搜索中发现的一些有趣的星团。
The Panchromatic Hubble Andromeda Treasury (PHAT) survey is an ongoing Hubble Space Telescope (HST) multi-cycle program to obtain high spatial resolution imaging of one-third of the M31 disk at ultraviolet through near-infrared wavelengths. In this paper, we present the first installment of the PHAT stellar cluster catalog. When completed, the PHAT cluster catalog will be among the largest and most comprehensive surveys of resolved star clusters in any galaxy. The exquisite spatial resolution achieved with HST has allowed us to identify hundreds of new clusters that were previously inaccessible with existing ground-based surveys. We identify 601 clusters in the Year 1 sample, representing more than a factor of four increase over previous catalogs within the current survey area (390 arcmin2). This work presents results derived from the first ∼25% of the survey data; we estimate that the final sample will include ∼2500 clusters. For the Year 1 objects, we present a catalog with positions, radii, and six-band integrated photometry. Along with a general characterization of the cluster luminosities and colors, we discuss the cluster luminosity function, the cluster size distributions, and highlight a number of individually interesting clusters found in the Year 1 search.