Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.186p...5b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 186, Jan. 1979, p. 5P-8P. Research supported by the Australian Research
Astronomy and Astrophysics
Astronomy
21
Glycine, Interstellar Matter, Radio Astronomy, Boltzmann Distribution, Electron Transitions, Hydrogen Clouds, Millimeter Waves, Radio Telescopes
Scientific paper
A search has been made for the simplest amino acid - glycine - in Sgr B2, Ori A, and seven other molecular clouds. Six different lines were sought ranging from 83.4 GHz down to 22.7 GHz, and radio telescopes at Parkes, New South Wales, Kitt Peak, Arizona, and Onsala, Sweden, were used. On the assumption of reasonable values for excitation temperature and Boltzmann distributions over rotational energy states, upper limits of column densities for glycine of a few times 10 to the 12th per sq cm to a few times 10 to the 14th per sq cm were typically established in the sources surveyed. Glycine appears to be less abundant than ethanol or ethyl cyanide in molecular clouds such as Sgr B2 and Ori A.
Bassez M.-P.
Batchelor Richard A.
Brown David R.
Godfrey Peter D.
Hjalmarson A. G.
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