DR21的一次万年前的爆炸
A 10,000 Years Old Explosion in DR21
摘要：
本文介绍了用亚毫米波天线阵（SMA）对天鹅座X分子云中大质量恒星形成区DR 21辐射流进行的高角分辨率（$\sim$ 2 $"$）CO（2-1）线观测。这些新的干涉观测表明，这种众所周知的神秘外流似乎是由大约10，000年前发生的爆炸事件产生的，这可能与500年前发生在猎户座BN/KL的大质量恒星系统的解体有关，但能量要高出约20倍。因此，这一结果支持了年轻恒星系统的解体可能是大质量恒星形成过程中常见的现象的观点。然而，仍然需要更多的理论和观察研究来证实我们的假设。
英文摘要：
Sensitive high angular resolution ($\sim$ 2$"$) CO(2-1) line observations made with the Submillimeter Array (SMA) of the flow emanating from the high-mass star forming region DR21 located in the Cygnus X molecular cloud are presented. These new interferometric observations indicate that this well known enigmatic outflow appears to have been produced by an explosive event that took place about 10,000 years ago, and that might be related with the disintegration of a massive stellar system, as the one that occurred in Orion BN/KL 500 years ago, but about 20 times more energetic. This result therefore argues in favor of the idea that the disintegration of young stellar systems perhaps is a frequent phenomenon present during the formation of the massive stars. However, many more theoretical and observational studies are still needed to confirm our hypothesis.
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