Tricarbon monoxide in TMC-1.
We report the measurement of three new lines of C3O in TMC-1.  The observed peak antenna temperatures, appropriately corrected for atmospheric and telescope losses, are found to be consistent with a large velocity gradient radiative transfer model whose parameters span the range of standard values for this cloud.  The derived fractional abundance for C3O is 1.4 x 10(-10), comparable with the results predicted from a model calculation based on a gas-phase ion-molecule reaction scheme.  The results of negative searches for C3O in six other sources are not inconsistent with expected conditions in these clouds.
Brown
R D
RD
Chemistry Department, Monash University.
Godfrey
P D
PD
Cragg
D M
DM
Rice
E H
EH
Irvine
W M
WM
Friberg
P
P
Suzuki
H
H
Ohishi
M
M
Kaifu
N
N
Morimoto
M
M
D055580:Astronomical Phenomena; D001256:Astronomy; D002248:Carbon Monoxide / Q000032:analysis* / Q000737:chemistry; D005118:Extraterrestrial Environment; D008956:Models, Chemical; D013696:Temperature
D002248:Carbon Monoxide