玫瑰花结复合体I的FLAMINGOS深度近红外成像调查：嵌入种群的识别和分布
A FLAMINGOS Deep Near Infrared Imaging Survey of the Rosette Complex I: Identification and Distribution of the Embedded Population
摘要：
我们提出了一个深的近红外成像调查的玫瑰复合体的结果。我们研究了年轻的嵌入源的分布，使用最近邻法的变化，适用于一个精心挑选的样本的近红外过量（NIRX）的跟踪复杂的恒星形成的最新一集的明星。我们的分析证实了先前在分子云中检测到的七个簇的存在，并在复合物中发现了另外四个簇。我们确定，复合体中60%的年轻恒星和分子云中86%的恒星都包含在星团中，这意味着玫瑰星云中的大多数恒星都形成于嵌入式星团中。我们比较了单个星系团的大小、红外过剩分数和平均消光，以研究它们的早期演化和膨胀。我们发现，星团的平均红外过量分数随着与NGC 2244的距离而增加，这意味着整个复杂的恒星形成的时间序列。这个序列似乎是原始的，可能是由于分子云的形成和演化，而不是与HII区域的相互作用。
英文摘要：
We present the results of a deep near-infrared imaging survey of the Rosette Complex. We studied the distribution of young embedded sources using a variation of the Nearest Neighbor Method applied to a carefully selected sample of near-infrared excess (NIRX) stars which trace the latest episode of star formation in the complex. Our analysis confirmed the existence of seven clusters previously detected in the molecular cloud, and identified four more clusters across the complex. We determined that 60% of the young stars in the complex and 86% of the stars within the molecular cloud are contained in clusters, implying that the majority of stars in the Rosette formed in embedded clusters. We compare the sizes, infrared excess fractions and average extinction towards individual clusters to investigate their early evolution and expansion. We found that the average infrared excess fraction of clusters increases as a function of distance from NGC 2244, implying a temporal sequence of star formation across the complex. This sequence appears to be primordial, possibly resulting from the formation and evolution of the molecular cloud and not from the interaction with the HII region.
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