Kinematic and thermal structure at the onset of high-mass star formation - ISOSS23053
Kinematic and thermal structure at the onset of high-mass star formation - ISOSS23053
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DOI：
10.1051/0004-6361/201321269
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发表时间：
2015-04
期刊：
影响因子：
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通讯作者：
S. Bihr;H. Beuther;H. Linz;S. Ragan;J. Tackenberg;Rowan J. Smith;T. Henning;O. Krause
中科院分区：
文献类型：
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作者：
S. Bihr;H. Beuther;H. Linz;S. Ragan;J. Tackenberg;Rowan J. Smith;T. Henning;O. Krause
在“恒星形成的最早阶段”（EPoS） Herschel项目中，我们用JVLA以高空间分辨率（3-5″）观测了6个非常年轻的高质量恒星形成区域的NH3反转线。赫歇尔的数据提供了尘埃连续体的细节，而氨的数据则揭示了运动和温度。在这里，我们展示了令人兴奋的恒星形成团isos23053，它显示了多个速度分量。我们在星团中观察到一个显著的速度阶跃，这可能是碰撞或汇聚流触发恒星形成的迹象。此外，我们使用c阵列配置的JVLA对该源进行了更详细的研究，并给出了新数据的第一个结果。它们支持汇聚流的想法，因为我们在NH3（1,1）和（2,2）线上观察到两个分量，而高激发态的NH3（3,3）线显示了一个连接两个低激发态线的分量。
Abstract Within the ‘earliest phases of star formation’ (EPoS) Herschel project, we observed the NH3 inversion lines of 6 very young high-mass star-forming regions at high spatial resolution (3-5″) with the JVLA. While the Herschel data provide details about the dust continuum, the ammonia data reveal the kinematics and temperatures. Here we present the exciting star-forming clump ISOSS23053 that shows multiple velocity components. We observe a prominent velocity step within the clump, which could be a sign of colliding or converging flows that triggers star formation. Furthermore, we used the JVLA in the C-array configuration to study this source in more detail and we present the first results from the new data. They support the idea of converging flows, as we observe two components in the NH3(1,1) and (2,2) line, whereas the higher excited NH3(3,3) line shows one component that links the two lower excited lines.