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arXiv 1204.3091astro-ph.COastro-ph.GAastro-ph.SR
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PHAT星团巡天I。第一年目录和综合光度学

PHAT Stellar Cluster Survey I. Year 1 Catalog and Integrated Photometry

L. Clifton Johnson, Anil C. Seth, Julianne J. Dalcanton, Nelson Caldwell, Morgan Fouesneau, Dimitrios A. Gouliermis, Paul W. Hodge, Soeren S. Larsen, Knut A. G.… 展开作者

L. Clifton Johnson, Anil C. Seth, Julianne J. Dalcanton, Nelson Caldwell, Morgan Fouesneau, Dimitrios A. Gouliermis, Paul W. Hodge, Soeren S. Larsen, Knut A. G. Olsen, Izaskun San Roman, Ata Sarajedini, Daniel R. Weisz, Benjamin F. Williams, Lori C. Beerman, Luciana Bianchi, Andrew E. Dolphin, Leo Girardi, Puragra Guhathakurta, Jason Kalirai, Dustin Lang, Antonela Monachesi, Sanjay Nanda, Hans-Walter Rix, Evan D. Skillman

摘要:

全色哈勃仙女座宝藏(PHAT)调查是一个正在进行的哈勃太空望远镜(HST)多周期计划,以获得从紫外到近红外波长的M31盘的三分之一的高空间分辨率成像。本文介绍PHAT星团星表的第一部分。完成后,PHAT星团目录将成为任何星系中最大和最全面的星团调查。HST所达到的精致空间分辨率使我们能够识别数百个新的星团,这些星团以前无法通过现有的地面调查获得。我们在第一年的样本中识别出了601个星团,比当前调查区域(390弧分^[2])内以前的星表增加了4倍多。这项工作的结果来自第一个\sim 25%的调查数据,我们估计,最终的样本将包括\sim 2500集群。对于第一年的对象,我们提出了一个目录的位置,半径和六波段积分测光。随着一般的集群光度和颜色的表征,我们讨论了集群光度函数,集群的大小分布,并突出了一些单独有趣的集群中发现的第1年的搜索。

英文摘要:

The Panchromatic Hubble Andromeda Treasury (PHAT) survey is an on-going 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 arcmin^2). This work presents results derived from the first \sim25% of the survey data; we estimate that the final sample will include \sim2500 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.

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