THE CHANDRA CARINA COMPLEX PROJECT VIEW OF TRUMPLER 16
THE CHANDRA CARINA COMPLEX PROJECT VIEW OF TRUMPLER 16
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TRUMPLER 16 的 Chandra Carina 综合体项目视图
DOI：
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发表时间：
2011
期刊：
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通讯作者：
H. Zinnecker
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作者：
S. Wolk;P. Broos;K. Getman;E. Feigelson;T. Preibisch;L. Townsley;Junfeng Wang;K. Stassun;R. R. King;M. McCaughrean;A. Moffat;H. Zinnecker
Trumpler 16是一个著名的丰富星团，包含喷发的超巨星船底座η，位于船底座恒星形成复合体中。在Chandra Carina Complex项目的背景下，我们使用新的和存档的X射线数据来研究Trumpler 16。一份修订后的Trumpler 16区域X射线源清单包含1232个X射线源，其中包括1187个可能的Carina成员。它们与超大型望远镜的Hawk-I仪器探测到的1047个近红外对应物相匹配，从而能够更好地选择星系团成员。星团的形状是不规则的。虽然大致呈圆形，但次聚集度很高，没有明显的中心集中，向东南延伸。大质量恒星既没有质量分离的证据，也没有强烈差异灭绝的证据。得到的Trumpler 16 X射线光度函数的幂函数斜率揭示了一个比猎户座星云更陡峭的函数，这意味着太阳质量与大质量恒星的比例不同。我们估计Trumpler 16前主序总体为>；6500个II类和III类X射线源。尽管亚星系团之间有一些差异，特别是在东南伸展区域，但利用X射线选择的样本得到的总体K过剩盘频率为∼8.9%。29颗高质量恒星的X射线辐射被探测到，这些恒星的光谱类型在B2和03之间。
Trumpler 16 is a well-known rich star cluster containing the eruptive supergiant η Carinae and located in the Carina star-forming complex. In the context of the Chandra Carina Complex Project, we study Trumpler 16 using new and archival X-ray data. A revised X-ray source list of the Trumpler 16 region contains 1232 X-ray sources including 1187 likely Carina members. These are matched to 1047 near-infrared counterparts detected by the HAWK-I instrument at the Very Large Telescope allowing for better selection of cluster members. The cluster is irregular in shape. Although it is roughly circular, there is a high degree of sub-clustering, with no noticeable central concentration and an extension to the southeast. The high-mass stars show neither evidence of mass segregation nor evidence of strong differential extinction. The derived power-law slope of the X-ray luminosity function for Trumpler 16 reveals a much steeper function than the Orion Nebula Cluster, implying a different ratio of solar- to higher-mass stars. We estimate the total Trumpler 16 pre-main-sequence population to be >6500 Class II and Class III X-ray sources. An overall K-excess disk frequency of ∼8.9% is derived using the X-ray-selected sample, although there is some variation among the sub-clusters, especially in the southeastern extension. X-ray emission is detected from 29 high-mass stars with spectral types between B2 and O3.