Young star clusters in circumnuclear starburst rings
Young star clusters in circumnuclear starburst rings
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核周星暴环中的年轻星团
DOI：
10.1093/mnras/stw2806
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发表时间：
2017
影响因子：
4.8
通讯作者：
Anders Peter
中科院分区：
文献类型：
--
作者：
de Grijs Richard;Ma Chao;Jia Siyao;Ho Luis C.;Anders Peter
我们分析了三个星系中最年轻的星团的光度函数（clf），这些星团表现出突出的环核星暴环。我们特别关注NGC 1512和NGC 6951，我们可以访问H$\alpha$数据，使我们能够明确地识别最年轻的样本星团。为了将我们的结果建立在坚实的统计基础上，我们首先详细探讨了一些重要的技术问题，这些问题会影响将观测数据转换为最终星表中天体的光谱能量分布的过程。两个星系中年轻星团的clf表现出近似的幂律行为，直到90%的观测完整性极限，从而表明在星暴环的剧烈环境中星团的形成过程似乎与当地宇宙中的其他地方相似。我们在星暴环星系中星际介质密度的背景下讨论这一结果。
We analyse the cluster luminosity functions (CLFs) of the youngest star clusters in three galaxies exhibiting prominent circumnuclear starburst rings. We focus specifically on NGC 1512 and NGC 6951, for which we have access to H$\alpha$ data that allow us to unambiguously identify the youngest sample clusters. To place our results on a firm statistical footing, we first explore in detail a number of important technical issues affecting the process from converting the observational data into the spectral-energy distributions of the objects in our final catalogues. The CLFs of the young clusters in both galaxies exhibit approximate power-law behaviour down to the 90 per cent observational completeness limits, thus showing that star cluster formation in the violent environments of starburst rings appears to proceed similarly as that elsewhere in the local Universe. We discuss this result in the context of the density of the interstellar medium in our starburst-ring galaxies.