Other
Scientific paper
Jul 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997dps....29.3714p&link_type=abstract
American Astronomical Society, DPS meeting #29, #37.14; Bulletin of the American Astronomical Society, Vol. 29, p.1049
Other
1
Scientific paper
We present results of line searches carried out at 7 mm and 1.3 cm wavelength, using the Haystack Observatory 37-m antenna. The focus of this observing campaign was on searches for heavy molecules, with large moments of inertia, where the partition function of the molecule may favor observations at low frequencies. A successful detection was made of the CH_3OH 7(0)-6(1) A+ transition at 44 GHz, with peak antenna temperature of approximately 70 mK km/s on March 28, 1997. However, other searches were unsuccessful, and only upper limits were obtained for C_3H_2 3(2,1)-3(1,2), CS 1-0, CCS 4,3-3,2, HC_3N 5-4, HC_5N 18-17, NH_3 1(1)-1(1), and NH_3 3(3)-3(3). Three-sigma limits are 13 mK km/s for C_3H_2, 8 mK km/s for CCS, 9 mK km/s for HC_3N, 15 mK km/s for HC_5N, and 18 mK km/s for NH_3 3(3)-3(3). Assuming a rotational temperature of 70 K, the production rate for HC_3N is log Q[HC_3N] < 27.5, consistent with the detection reported by Lis et al. on IAUC 6566. For CH_3OH, assuming thermal equilibrium at 100 K, log Q[CH_3OH] = 29.5.
de Vries Chris
Dickens J.
Irvine William
Lovell Amy
Pratap Preethi
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