The origin and structure of clumps along molecular outflows: the test case of CB3
The origin and structure of clumps along molecular outflows: the test case of CB3
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沿着分子流出的团块的起源和结构：CB3 的测试案例
DOI：
10.1111/j.1365-2966.2004.07722.x
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发表时间：
2004
影响因子：
4.8
通讯作者：
R. Bachiller
中科院分区：
文献类型：
--
作者：
S. Viti;C. Codella;M. Benedettini;R. Bachiller
我们研究了在CB3和L1157等富含化学物质的流出物的主轴上观察到的富含化学物质的小分子团块的起源。我们开发了一个化学模型，在那里我们探索这些团块的化学演化，假设它们要么部分在流出之前就已经存在，要么是由于流出对周围介质的影响而新形成的。流出物的冲击效应通过团块中的密度和温度变化来再现。我们发现，观测到的CH3OH、SO和SO2的丰度最好的再现是假设在它们的激发（原）恒星形成之前，观测到的致密分子气体可能已经在星际介质中预先存在。我们还发现，团块和团块的丰富化学成分是预先存在的密度增强及其与流出物相互作用的结果。
We investigate the origin of the small, chemically rich molecular clumps observed along the main axis of chemically rich outflows such as CB3 and L1157. We develop a chemical model where we explore the chemical evolution of these clumps, assuming that they either partially pre-exist before the outflow, or are newly formed by the impact of the outflow on the surrounding medium. The effects of the impact of the outflow are reproduced by density and temperature changes in the clump. We find that the observed abundances of CH3OH, SO and SO2 are best reproduced by assuming a scenario where the dense molecular gas observed probably pre-exists in the interstellar medium before the formation of their exciting (proto)stars. We also find that the clumpiness and the rich chemistry of the clumps are a consequence of a pre-existing density enhancement and of its interaction with the outflow.
影响因子：
3.2
作者：
V. Mannings;A. Boss;S. Russell
通讯作者：
V. Mannings;A. Boss;S. Russell