Observations of the C-12 and C-13 isotopes of formamide at 19 CM

Details Observations of the C-12 and C-13 isotopes of formamide at 19 CM Observations of the C-12 and C-13 isotopes of formamide at 19 CM

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.193..713g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 193, Dec. 1980, p. 713-721.

Astronomy and Astrophysics

Astronomy

3

Amides, Astronomical Spectroscopy, Carbon 12, Carbon 13, Interstellar Matter, Molecular Clouds, Centimeter Waves, Emission Spectra, Hyperfine Structure, Milky Way Galaxy

Scientific paper

Observations towards the Galactic Center of the 1(10)-1(11) transition of the C-13 and C-12 isotopes of NH2CHO were performed; they yielded C-12/C-13 ratios of 27 + or - 3 for Sgr B2 and 31 + or - 7 for Sgr A. Spectra of NH2(C-12)HO showing all hyperfine components in emission were obtained for Sgr A and Sgr B2. No evidence for non-LTE behavior was obtained, although the hyperfine intensity data for Sgr B2 suggest an optical depth of about -0.1 (i.e., a population inversion) for the strongest component (F = 2-2). A 13-point map around Sgr B2 indicated that the source was about 3 arcmin in extent.

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