The increasing chemical complexity of the Taurus dark clouds - Detection of CH3CCH and C4H
The increasing chemical complexity of the Taurus dark clouds - Detection of CH3CCH and C4H
复制标题
金牛座乌云的化学复杂性不断增加 - CH3CCH 和 C4H 的检测
DOI：
10.1086/183637
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
J. Ellder
中科院分区：
文献类型：
--
作者：
W. Irvine;B. Hoglund;P. Friberg;J. Askne;J. Ellder
本文报道了在冷暗云中首次检测到甲基乙炔(CH/SUB_3/CCH)和丁二炔自由基(C/SUB_4/H)。2/sub0/..-->；..1/sub0/和2/sub1/..-->；..1/SUB 1/CH/SUB 3/CCH的跃迁和超精细分辨N=3.-->；2分别发生在34 GHz和29 GHz附近的C/sub4/H跃迁都是首次在天文上看到的。CH/SUB3/CCH在TMC-1中的分布似乎与氰基多炔的分布有关，而与NH/SUB3/或CN无关。TMC-1HC/sub5/N峰的丰度比包括(CH/sub3/C/sub2/H)/(HC/sub2/CN)大致等于1、(C/sub4/H)/(C/sub2/H)大致等于1和(C/sub4/H)/(HC/sub4/CN)大致等于4。
We report the first detection in cold dark clouds of methyl acetylene (CH/sub 3/CCH) and the butadiynyl radical (C/sub 4/H). The 2/sub 0/ ..-->.. 1/sub 0/ and 2/sub 1/ ..-->.. 1/sub 1/ transitions of CH/sub 3/CCH and the hyperfine-resolved N = 3 ..-->.. 2 transitions of C/sub 4/H, which occur at frequencies near 34 and 29 GHz, respectively, are all seen astronomically for the first time. The distribution of CH/sub 3/CCH in TMC--1 appears to correlate with that of the cyanopolyynes, and not with NH/sub 3/ or CN. Abundance ratios at the TMC--1 HC/sub 5/N peak include (CH/sub 3/C/sub 2/H)/(HC/sub 2/CN)roughly-equal1, (C/sub 4/H)/(C/sub 2/H)roughly-equal1, and (C/sub 4/H)/(HC/sub 4/CN)roughly-equal4.