C. Cabezas, M. Agúndez, N. Marcelino, C. H. Chang, R. Fuentetaja, B. Tercero, M. Nakajima, Y. Endo, P. de Vicente, J. Cernicharo
{"title":"TMC-1中星际1-氰基丙炔基（HCCCHCN）的鉴定","authors":"C. Cabezas, M. Agúndez, N. Marcelino, C. H. Chang, R. Fuentetaja, B. Tercero, M. Nakajima, Y. Endo, P. de Vicente, J. Cernicharo","doi":"10.1051/0004-6361/202453419","DOIUrl":null,"url":null,"abstract":"We report the first detection in interstellar medium of the 1-cyano propargyl radical, HC<sub>3<sub/>HCN. This species is an isomer of the 3-cyano propargyl radical (CH<sub>2<sub/>C<sub>3<sub/>N), which was recently discovered in TMC-1. The 1-cyano propargyl radical was observed in the cold dark cloud TMC-1 using data from the ongoing QUIJOTE line survey, which is being carried out with the Yebes 40m telescope. A total of seven rotational transitions with multiple hyperfine components were detected in the 31.0–50.4 GHz range. We derived a column density of (2.2 ± 0.2) × 10<sup>11<sup/> cm<sup>−2<sup/> and a rotational temperature of 7±1 K. The abundance ratio between HC<sub>3<sub/>HCN and CH<sub>2<sub/>C<sub>3<sub/>N is 1.4. The almost equal abundance of these isomers indicates that the two species may be produced in the same reaction with a similar efficiency, probably in the reaction C + CH<sub>2<sub/>CHCN and perhaps also in the reaction C<sub>2<sub/> + CH<sub>3<sub/>CN and the dissociative recombination with electrons of CH<sub>2<sub/>C<sub>3<sub/>NH<sup>+<sup/>.","PeriodicalId":8571,"journal":{"name":"Astronomy & Astrophysics","volume":"29 1","pages":""},"PeriodicalIF":5.8000,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Identification of the interstellar 1-cyano propargyl radical (HCCCHCN) in TMC-1\",\"authors\":\"C. Cabezas, M. Agúndez, N. Marcelino, C. H. Chang, R. Fuentetaja, B. Tercero, M. Nakajima, Y. Endo, P. de Vicente, J. Cernicharo\",\"doi\":\"10.1051/0004-6361/202453419\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We report the first detection in interstellar medium of the 1-cyano propargyl radical, HC<sub>3<sub/>HCN. This species is an isomer of the 3-cyano propargyl radical (CH<sub>2<sub/>C<sub>3<sub/>N), which was recently discovered in TMC-1. The 1-cyano propargyl radical was observed in the cold dark cloud TMC-1 using data from the ongoing QUIJOTE line survey, which is being carried out with the Yebes 40m telescope. A total of seven rotational transitions with multiple hyperfine components were detected in the 31.0–50.4 GHz range. We derived a column density of (2.2 ± 0.2) × 10<sup>11<sup/> cm<sup>−2<sup/> and a rotational temperature of 7±1 K. The abundance ratio between HC<sub>3<sub/>HCN and CH<sub>2<sub/>C<sub>3<sub/>N is 1.4. The almost equal abundance of these isomers indicates that the two species may be produced in the same reaction with a similar efficiency, probably in the reaction C + CH<sub>2<sub/>CHCN and perhaps also in the reaction C<sub>2<sub/> + CH<sub>3<sub/>CN and the dissociative recombination with electrons of CH<sub>2<sub/>C<sub>3<sub/>NH<sup>+<sup/>.\",\"PeriodicalId\":8571,\"journal\":{\"name\":\"Astronomy & Astrophysics\",\"volume\":\"29 1\",\"pages\":\"\"},\"PeriodicalIF\":5.8000,\"publicationDate\":\"2025-01-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Astronomy & Astrophysics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1051/0004-6361/202453419\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ASTRONOMY & ASTROPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Astronomy & Astrophysics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1051/0004-6361/202453419","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
Identification of the interstellar 1-cyano propargyl radical (HCCCHCN) in TMC-1
We report the first detection in interstellar medium of the 1-cyano propargyl radical, HC3HCN. This species is an isomer of the 3-cyano propargyl radical (CH2C3N), which was recently discovered in TMC-1. The 1-cyano propargyl radical was observed in the cold dark cloud TMC-1 using data from the ongoing QUIJOTE line survey, which is being carried out with the Yebes 40m telescope. A total of seven rotational transitions with multiple hyperfine components were detected in the 31.0–50.4 GHz range. We derived a column density of (2.2 ± 0.2) × 1011 cm−2 and a rotational temperature of 7±1 K. The abundance ratio between HC3HCN and CH2C3N is 1.4. The almost equal abundance of these isomers indicates that the two species may be produced in the same reaction with a similar efficiency, probably in the reaction C + CH2CHCN and perhaps also in the reaction C2 + CH3CN and the dissociative recombination with electrons of CH2C3NH+.
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Astronomy & Astrophysics is an international Journal that publishes papers on all aspects of astronomy and astrophysics (theoretical, observational, and instrumental) independently of the techniques used to obtain the results.
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