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arXiv 2108.02308astro-ph.GA
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通过QUIJOTE线路勘测在TMC-1中发现苯炔o-C6H4

Discovery of benzyne, o-C6H4, in TMC-1 with the QUIJOTE line survey

J. Cernicharo, M. Agundez, R. I. Kaiser, C. Cabezas, B. Tercero, N. Marcelino, J. R. Pardo, P. de Vicente

摘要:

我们报告的检测,在空间中的第一次,一个新的非官能化的烃循环在TMC-1的方向:o-C6 H4(邻苯乙炔)。我们推导出该烃循环的柱密度为(5 +/- 1)e11 cm-2。该物种的丰度比环戊二烯和茚低约30倍。我们比较了苯炔与其他纯烃、环或链的丰度,发现它可以通过C_2H + CH_2CHCCH和C + C_5H_5等中性自由基反应形成,也可能通过C_4H + C_2H_4、C_3H + CH_2CCH_2和C_3H_2 + C_3H_3形成。因此,在TMC-1中观察到的丰富的烃循环内容可能是通过自下而上的方案产生的,该方案涉及几个自由基与最近由QUIJOTE线勘测揭示的丰富烃的反应。

英文摘要:

We report the detection, for the first time in space, of a new non-functionalised hydrocarbon cycle in the direction of TMC-1: o-C6H4 (ortho-benzyne). We derive a column density for this hydrocarbon cycle of (5 +/- 1)e11 cm-2. The abundance of this species is around 30 times lower than that of cyclopentadiene and indene. We compare the abundance of benzyne with that of other pure hydrocarbons, cycles or chains, and find that it could be formed from neutral-radical reactions such as C2H + CH2CHCCH and C + C5H5, and possibly through C4H + C2H4, C3H + CH2CCH2, and C3H2 + C3H3. Hence, the rich content of hydrocarbon cycles observed in TMC-1 could arise through a bottom-up scenario involving reactions of a few radicals with the abundant hydrocarbons recently revealed by the QUIJOTE line survey.

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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