Early Results of the 3 mm Spectral Line Survey toward the Lynds 1157 B1 Shocked Region

Early Results of the 3 mm Spectral Line Survey toward the Lynds 1157 B1 Shocked Region
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Lynds 1157 B1 震波区域 3 毫米谱线勘测的早期结果

DOI:
10.1093/pasj/63.2.459
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发表时间:
2011
期刊:
Publ. Astron. Soc. Japan
影响因子:
--
通讯作者:
and S. Yamamoto
and S. Yamamoto
中科院分区:
--
文献类型:
--
作者:
M. Sugimura;T. Yamaguchi;T. Sakai;T. Umemoto;N. Sakai;S. Takano;Y. Aikawa;N. Hirano;S.-Y. Liu;T.J. Millar;H. Nomura;Y.-N. Su;S. Takakuwa;and S. Yamamoto

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我们对冲击区Lynds 1157 B1进行了灵敏的3 mm观测,该区域是分子流出与周围气体之间的相互作用点。我们已经成功地检测到CHCHO,HCOOCH和HCOOH线,以及CHDOH线。这些分子相对于CHOH的丰度被发现低于低质量恒星形成核心IRAS 162932422。由于这些分子被认为是从颗粒地幔中蒸发出来的,观测结果意味着复杂分子在星前/原恒星核心周围的环境云中的颗粒地幔中含量较少。相反,复杂的有机物质和氘代物质的有效形成应该发生在星前/原恒星核心。本文的结果证实了对该震源进行无偏测线的重要性。
We have conducted a sensitive 3 mm observation toward the shocked region, Lynds 1157 B1, which is an interaction spot between a molecular outflow and its ambient gas. We have successfully detected the CHCHO, HCOOCH, and HCOOH lines, as well as the CHDOH line. The abundances of these molecules relative to CHOH are found to be lower than those in the low-mass star-forming core, IRAS 162932422. Since these molecules are thought to evaporate from grain mantles, the observational results mean that complex molecules are less abundant in grain mantles residing in the ambient cloud surrounding a prestellar/protostellar core. Instead, efficient formation of the complex organic species and deuterated species should take place in a prestellar/protostellar core. The present result verifies the importance of an unbiased line survey of this source.
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