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Title

Detection of c5n- and vibrationally excited c 6h in irc +102161

AuthorsCernicharo, José ; Guélin, M.; Agúndez, Marcelino ; McCarthy, M. C.; Thaddeus, P.
KeywordsISM: molecules
Radio lines: ISM
Stars: individual (IRC 10216)
Circumstellar matter
Stars: AGB and post-AGB
Issue Date29-Oct-2008
PublisherUniversity of Chicago Press
CitationAstrophysical Journal 687: L83- L86 (2008)
AbstractWe 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 2Δ and 2Σ- vibronic states of C6H in its lowest (v11) 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. © 2008. The American Astronomical Society. All rights reserved. Printed in U.S.A.
Description4 pags., 4 figs., 2 tabs.
Publisher version (URL)https://doi.org/10.1086/595583
URIhttp://hdl.handle.net/10261/191892
Identifiersdoi: 10.1086/593183
issn: 0004-637X
Appears in Collections:(CFMAC-IEM) Artículos
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