Arp 284的星团解体
Star Cluster Dissolution in Arp 284
摘要：
本文介绍了对相互作用星系Arp 284（NGC 7714/5）中的原球状星团候选者的研究结果。对超新星和M51的研究表明，这些星团中的大多数在2000万年内由于质量损失而溶解。我们获得集群的颜色使用档案\emph{HST}数据，并估计年龄和进化合成模型超过150个集群。我们发现NGC 7714中的星系团年龄一般小于2000万年，而桥中的数据太有限，无法对单个星系团进行良好的估计。我们还研究了{H { \sc ii}}区域复合物与低分辨率\emph{GALEX}和地面H $α$图像。其中几个区域似乎比它们内部检测到的集群要古老得多，这可能表明存在较老的未解决的低质量或分散集群。
英文摘要：
We present results from a study of proto-globular cluster candidates in the interacting galaxy system Arp 284 (NGC 7714/5). Studies of the Antennae and M51 have suggested that the majority of these star clusters dissolve within 20 Myr due to mass loss. We obtain cluster colors using archival \emph{HST} data, and estimate ages and extinctions for over 150 clusters using evolutionary synthesis models. We find that clusters in NGC 7714 are generally less than 20 Myr old, while the data in the bridge is too limited to allow good estimates for individual clusters. We also examine {H {\sc ii}} region complexes with lower-resolution \emph{GALEX} and ground-based H$α$ images. Several of these regions appear to be much older than the detected clusters within them, which may indicate the presence of an older, unresolved population of low mass or dispersed clusters.
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