Evidence of Core Growth in the Dragon Infrared Dark Cloud: A Path for Massive Star Formation
Evidence of Core Growth in the Dragon Infrared Dark Cloud: A Path for Massive Star Formation
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DOI：
10.3847/1538-4357/abefe7
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发表时间：
2021-03
期刊：
影响因子：
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通讯作者：
Shuo Kong;H. Arce;Y. Shirley;Colton Glasgow
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文献类型：
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作者：
Shuo Kong;H. Arce;Y. Shirley;Colton Glasgow
本文对龙云红外暗云（G28.37+0.07或G28.34+0.06）中1.3mm连续谱芯样品进行了统计分析。根据它们与分子外流的联系，样品被分为原恒星和无恒星核心。统计测试表明，原恒星的核心比无恒星的核心更大，即使在温度和不透明度的偏差。我们认为，质量差异表明核心质量增长，因为他们的形成。质量增长意味着大质量星星的形成可能不一定要从大质量的星前核心开始，这取决于核心质量增长率。它对核心质量函数与恒星初始质量函数关系的影响有待进一步探讨。
A sample of 1.3 mm continuum cores in the Dragon infrared dark cloud (also known as G28.37+0.07 or G28.34+0.06) is analyzed statistically. Based on their association with molecular outflows, the sample is divided into protostellar and starless cores. Statistical tests suggest that the protostellar cores are more massive than the starless cores, even after temperature and opacity biases are accounted for. We suggest that the mass difference indicates core mass growth since their formation. The mass growth implies that massive star formation may not have to start with massive prestellar cores, depending on the core mass growth rate. Its impact on the relation between core mass function and stellar initial mass function is to be further explored.