A search for the J = 1-0 transition of /C-14/O

Details A search for the J = 1-0 transition of /C-14/O A search for the J = 1-0 transition of /C-14/O

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.202..265p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 202, Jan. 1983, p. 265-268.

Astronomy and Astrophysics

Astronomy

2

Abundance, Carbon Monoxide, Carbon 14, Electron Transitions, Milky Way Galaxy, Molecular Clouds, Supernova Remnants, Carbon 12

Scientific paper

New and improved upper limits for the intensity of the J = 1-0 transition of /C-14/O in seven sources are determined. Five of these clouds represent star-formation zones, and the remaining two are supernovae remnants associated with relatively high CO antenna temperatures. The observations were taken with the NRAO-11 m antenna at Kitt Peak during November 1981. Although the noise levels achieved are extremely low, no evidence of /C-14/O emission in any of the sources investigated is found. Two-sigma upper limits for the C-14/C-12 ratio are found which are between 1.2 and 4.4 x 10 to the -5th in five star formation zones, and of order 10 to the -4th and greater for the SNRs S 147 and IC 443.

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