DETECTION OF C5N- AND VIBRATIONALLY EXCITED C6H IN IRC+10216

被引：215

作者：

Cernicharo, J. ^{[1
]}

Guelin, M. ^{[2
,3
]}

Agundez, M. ^{[1
]}

McCarthy, M. C. ^{[4
,5
]}

Thaddeus, P. ^{[4
,5
]}

机构：

[1] CSIC, DAMIR, Inst Estructura Mat, Madrid 28006, Spain

[2] Inst Radio Astron Millimetr, F-38406 St Martin Dheres, France

[3] Observ Paris, LRA ENS LERMA, Paris, France

[4] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[5] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2008年 / 688卷 / 02期

基金：

美国国家科学基金会;

关键词：

circumstellar matter; ISM: molecules; radio lines: ISM; stars: AGB and post-AGB; stars: individual (IRC+10216);

D O I：

10.1086/595583

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection in the envelope of the C-rich star IRC + 10216 of four series of lines with harmonically related frequencies: B1389, B1390, B1394, and B1401. The four series must arise from linear molecules with mass and size close to those of C6H and C5N. Three of the series have half-integer rotational quantum numbers; we assign them to the (2)Delta and (2)Sigma(-) vibronic states of C6H in its lowest (nu(11)) bending mode. The fourth series, B1389, has integer J with no evidence of fine or hyperfine structure; it has a rotational constant of 1388.860(2) MHz and a centrifugal distortion constant of 33(1) Hz; it is almost certainly the C5N- anion.

引用

页码：L83 / L86

页数：4

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