Some new results on shock chemistry in IC 443

Details Some new results on shock chemistry in IC 443 Some new results on shock chemistry in IC 443

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...246l..37d&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 246, May 15, 1981, p. L37-L40.

Astronomy and Astrophysics

Astrophysics

56

Abundance, Interstellar Gas, Molecular Clouds, Shock Waves, Supernova Remnants, Carbon Isotopes, Carbon Monoxide, Emission Spectra, Hydrogen Clouds, Hydroxyl Emission, Line Spectra, Molecular Excitation, Molecular Spectra, Optical Thickness, Silicon Oxides, Spectrum Analysis

Scientific paper

New observations have been made of CO, CO-13, SiO, SO, H2CO, HCO(+), N2H(+), CS, OCS, HCN, and OH in the shocked clouds of IC 443. It is found that at position IC 443 B, (1) the shocked CO is optically thin; (2) the HCO(+)/CO abundance ratio is 4-9 x 10 to the -4 th, representing a tenfold enhancement over that of normal interstellar clouds; (3) there is no enhancement of SO or SIO, as occurs in Orion KL; and (4) there is optically thin preshock OH, confirming a hundredfold enhancement of the OH/CO ratio in the shock.

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