Publication Date:
2013-08-29
Description:
We have searched for rovibrational emission and absorption transitions arising from the 63 cm(exp -1) nu(sub 2) (pi(sub u)) bending vibration of the C3 carbon cluster in the interstellar medium using the Betz/Boreiko heterodyne receiver on board the Kuiper Airborne Observatory. The Q(4) line at 1896.707 GHz was searched for in the IRc2 Orion/M42 and the W3 sources, and the R(2) transition at 1968.594 GHz was searched for in Sgr B2. No emission lines were observed in any source. However, a weak absorption was detected in Sgr B2 with a LSR velocity of 63.7+/-0.6 km s(exp -1) and a FWHM linewidth of 7.9+/-0.8 km s(exp -1). This absorption is tentatively identified as the R(2) transition of the C(sub 3) bending mode.
Keywords:
ASTRONOMY
Type:
Astronomical Society of the Pacific, Airborne Astronomy Symposium on the Galactic Ecosystem: From Gas to Stars to Dust, Volume 73; p 67-70
Format:
text
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