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arXiv 1906.09352astro-ph.SRastro-ph.GAphysics.chem-ph
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空间发现第一个含钙分子:CaNC

Discovery of the first Ca-bearing molecule in space: CaNC

J. Cernicharo, L. Velilla-Prieto, M. Agúndez, J. R. Pardo, J. P. Fonfría, G. Quintana-Lacaci, C. Cabezas, C. Bermúdez, M. Guélin

摘要:

我们报告的检测异氰化钙,CaNC,在富碳的进化星IRC+10216。我们推导出该物质的柱密度为(2.0 $\pm$ 0.5)$\times$ 10 $^{11}$ cm $^{-2}$。根据观测到的谱线轮廓和模拟其通过包层的发射,该分子必须在拱星包层的中间层和外层产生,而以前在该来源中发现了其他金属异氰化物。CaNC相对于MgNC和FeCN的丰度比分别为$\simeq$ 1/60和$\simeq$ 1。我们搜索了CaF、CaCl、CaC、CaCCH和CaCH $_3$等物种,这些物种的准确频率预测可用。对于这些分子,仅获得了上限。

英文摘要:

We report on the detection of calcium isocyanide, CaNC, in the carbon-rich evolved star IRC+10216. We derived a column density for this species of (2.0$\pm$0.5)$\times$10$^{11}$ cm$^{-2}$. Based on the observed line profiles and the modelling of its emission through the envelope, the molecule has to be produced in the intermediate and outer layers of the circumstellar envelope where other metal-isocyanides have previously been found in this source. The abundance ratio of CaNC relative to MgNC and FeCN is $\simeq$1/60 and $\simeq$1, respectively. We searched for the species CaF, CaCl, CaC, CaCCH, and CaCH$_3$ for which accurate frequency predictions are available. Only upper limits have been obtained for these molecules.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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