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Detection of a new circumstellar carbon chain molecule, C4SiA new interstellar carbon chain molecule, C4Si, has been detected in the envelope of the evolved star IRC + 10216. This molecule is the carrier of six unidentified lines which had been detected during the molecular line survey at Nobeyama Radio Observatory. The identification was made through astronomical detections followed by quantum chemical calculations and laboratory spectroscopic experiments. The rotational constant and the centrifugal distortion constant were B(0) = 1533.77206(146) MHz and D(0) = 0.00005827(35) MHz, respectively, where the numbers in parentheses represent one standard deviation in units of the last significant digits. The rotation temperature and the column density were 15 + or - 2 K and (7 + or - 1) x 10 to the 12th/sq cm, respectively, assuming a source size of 25 arcsec.
Document ID
19900025120
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Ohishi, Masatoshi
(Toyama University Japan)
Kaifu, Norio
(Toyama Univ. Japan)
Kawaguchi, Kentarou
(Nobeyama Radio Observatory Minamimaki, Japan)
Murakami, Akinori
(Mitsubishi Kasei Corp., Research Center Yokohama, Japan)
Saito, Shuji
(Nagoya University Japan)
Date Acquired
August 14, 2013
Publication Date
October 15, 1989
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 345
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
90A12175
Funding Number(s)
CONTRACT_GRANT: NAGW-1483
Distribution Limits
Public
Copyright
Other

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