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http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2628| Title: | Detection of the linear radical HC4N in IRC+10216 |
| Keywords: | Astrochemistry Stars: AGB and post‐AGB Line: identification ISM: molecules Stars: individual (IRC +10216) |
| Publisher: | American Astronomical Society |
| Description: | We report the detection of the linear radical HC4N in the C-rich envelope of IRC+10216. After HCCN, HC4N is the second member of the allenic chain family HC_(2n)N observed in space. The column density of HC4N is found to be 1.5 10**12 cm**(-2). The abundance ratio HC2N/HC4N is 9, a factor of two larger than the decrement observed for the cyanopolyynes HC$_(2n+1)N/HC_(2n+3)N. Linear HC_4N has a 3-Sigma electronic ground state and is one of the 3 low-energy isomeric forms of this molecule. We have searched for the bent and ringed HC4N isomers, but could only derive an upper limit to their column densities of about 3 10**(12) cm**(-2). null Peer reviewed |
| URI: | http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2628 |
| Other Identifiers: | arXiv:astro-ph/0410657v1 The Astrophysical Journal Letters, 615:L145–L148, 2004 November 10 1538-4357 http://hdl.handle.net/10261/2628 10.1086/426439 |
| Appears in Collections: | Digital Csic |
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