SPECTRAL ENERGY DISTRIBUTIONS AND AGE ESTIMATES OF 104 M31 GLOBULAR CLUSTERS
SPECTRAL ENERGY DISTRIBUTIONS AND AGE ESTIMATES OF 104 M31 GLOBULAR CLUSTERS
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DOI：
10.1088/0004-6256/139/4/1438
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发表时间：
2010-01
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通讯作者：
Song Wang;Z. Fan;Jun Ma;R. Grijs;X. Z. N. A. Observatories;Chinese Academy of Sciences Graduate University;Chinese Academy of Sciences Kavli Institute for Astronomy-Chinese-Academy-of-Sciences-Kavli-Institute-for-102352388;National Astronomical Observatories;Chinese Academy of Sciences Kavli Institute for Astronomy-Chinese-Academy-of-Sciences-Kavli-Institute-for-102352388;Astrophysics;P. U. D. O. Physics;Astronomy;U. Sheffield
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文献类型：
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作者：
Song Wang;Z. Fan;Jun Ma;R. Grijs;X. Z. N. A. Observatories;Chinese Academy of Sciences Graduate University;Chinese Academy of Sciences Kavli Institute for Astronomy-Chinese-Academy-of-Sciences-Kavli-Institute-for-102352388;National Astronomical Observatories;Chinese Academy of Sciences Kavli Institute for Astronomy-Chinese-Academy-of-Sciences-Kavli-Institute-for-102352388;Astrophysics;P. U. D. O. Physics;Astronomy;U. Sheffield
本文介绍了北京-亚利桑那-台湾-康涅狄格测光系统中15个中带滤光片对104个M31球状星团（GC）及其候选者的测光结果。GC和GC候选物选自修订的博洛尼亚目录（v.3.5）。我们通过比较光度数据与最新的理论合成模型获得的集群年龄。使用的测光数据是银河演化探测器远紫外和近紫外和2微米全天巡天近红外JHK星等，并结合光学测光。我们的样本集群的年龄覆盖了很大的范围，虽然大多数集群是年轻的10 Gyr。结合我们以前关于M31 GC系统的系列文章中获得的年龄，我们给出了完整的M31 GC年龄分布。M31 GC系统包含年轻和中年GC群体，以及众所周知的老年GC的“通常”补充，即，年龄与银河系大部分GC相似的GC。此外，年轻的GC（和GC候选者）在距离M31中心的径向距离上几乎均匀分布，而大多数老GC（和GC候选者）则更加集中。
We present photometry of 104 M31 globular clusters (GCs) and GC candidates in 15 intermediate-band filters of the Beijing–Arizona–Taiwan–Connecticut photometric system. The GCs and GC candidates were selected from the Revised Bologna Catalog (v.3.5). We obtain the cluster ages by comparing the photometric data with up-to-date theoretical synthesis models. The photometric data used are Galaxy Evolution Explorer far- and near-ultraviolet and Two Micron All Sky Survey near-infrared JHKs magnitudes, combined with optical photometry. The ages of our sample clusters cover a large range, although most clusters are younger than 10 Gyr. Combined with the ages obtained in our series of previous papers focusing on the M31 GC system, we present the full M31 GC age distribution. The M31 GC system contains populations of young and intermediate-age GCs, as well as the “usual” complement of well-known old GCs, i.e., GCs of similar age as the majority of the Galactic GCs. In addition, young GCs (and GC candidates) are distributed nearly uniformly in radial distance from the center of M31, while most old GCs (and GC candidates) are more strongly concentrated.