Detection of a new carbon-chain molecule, CCO.
We have detected a new carbon-chain molecule, CCO(3 sigma-), in the cold, dark molecular cloud TMC-1.  The excitation temperature and the column density of CCO are, respectively, approximately 6 K and approximately 6 x 10(11) cm-2.  This column density corresponds to a fractional abundance relative to H2 of approximately 6 x 10(-11).  This value is two orders of magnitude less than the abundance of the related carbon-chain molecule CCS, and about half that of C3O.  The formation mechanism for CCO is discussed.
Ohishi
M
M
Nobeyama Radio Observatory, Nagano, Japan.
Suzuki
H
H
Ishikawa S-I
Yamada
C
C
Kanamori
H
H
Irvine
W M
WM
Brown
R D
RD
Godfrey
P D
PD
Kaifu
N
N
D055580:Astronomical Phenomena; D001256:Astronomy; D002244:Carbon / Q000032:analysis* / Q000737:chemistry* / Q000145:classification; D008958:Models, Molecular; D011846:Radio Waves; D016082:Solar System; D013696:Temperature
D002244:Carbon