Observations of the J=1-0 Transitions of 12CO, 13CO, C18O Toward OMC-1

Details Observations of the J=1-0 Transitions of 12CO, 13CO, C18O Toward OMC-1 Observations of the J=1-0 Transitions of 12CO, 13CO, C18O Toward OMC-1

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jkas...26...65s&link_type=abstract

Journal of the Korean Astronomical Society, vol. 26, no. 1, p. 65-72

Astronomy and Astrophysics

Astronomy

Interstellar Cloud, Interstellar Molecule - Orion Nebula

Scientific paper

Using the Daeduk Radio Telescope, we have observed J=1-0 transitions of 12CO, 13CO, and C18O toward OMC-1. The column densities of 1-5*10E17/cm2 and 1-3*10E16/cm2 have been derived, for 13CO and C18O, respectively, in the 11*11min. region centered at Orion-KL. The double isotope ratio 13CO/C18O was found to be larger than the cosmic abundance ratio by factors of 2 - 10 which may result from the chemical fractionation effect.

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