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Article Dans Une Revue The Astrophysical journal letters Année : 2008

Detection of C5N- and Vibrationally Excited C6H in IRC +10216

Résumé

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 2Delta and 2Sigma- vibronic states of C6H in its lowest (nu11) 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.
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Dates et versions

hal-03732622 , version 1 (21-07-2022)

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José Cernicharo, Michel Guélin, Marcelino Agúndez, M. C. Mccarthy, P. Thaddeus. Detection of C5N- and Vibrationally Excited C6H in IRC +10216. The Astrophysical journal letters, 2008, 688, pp.L83-L86. ⟨hal-03732622⟩
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