论文标题
在TMC-1中发现HC4NC：HC3N，HC5N和HC7N的异构体的研究
Discovery of HC4NC in TMC-1: A study of the isomers of HC3N, HC5N, and HC7N
论文作者
论文摘要
我们介绍了TMC-1中的Cyanopolynes HC3N，HC5N和HC7N和IRC+10216中的Isocyano异构体的研究。这项研究使我们能够在TMC-1中首次报告HCCCCNC的检测，并在同一来源中给出HC6NC的上限。此外，在太空中也首次在空间中首次检测到HCCNC和HNCCC的氘化同位素以及HCCNC的所有13C取代。 HC3N和HC5N及其异构体的丰度比在TMC-1和IRC+10216中非常不同，即N（HC5N）/N（HC4NC）分别为300和> 2100。我们通过最可能的形成途径以及通过比较不同来源之间的观察性丰度比，讨论了氰基亚属的亚稳态异构体的化学。
We present a study of the isocyano isomers of the cyanopolyynes HC3N, HC5N, and HC7N in TMC-1 and IRC+10216 carried out with the Yebes 40m radio telescope. This study has enabled us to report the detection, for the first time in space, of HCCCCNC in TMC-1 and to give upper limits for HC6NC in the same source. In addition, the deuterated isotopologues of HCCNC and HNCCC were detected, along with all 13C substitutions of HCCNC, also for the first time in space. The abundance ratios of HC3N and HC5N, with their isomers, are very different in TMC-1 and IRC+10216, namely, N(HC5N)/N(HC4NC) is 300 and >2100, respectively. We discuss the chemistry of the metastable isomers of cyanopolyynes in terms of the most likely formation pathways and by comparing observational abundance ratios between different sources.
