Indirect observation of unobservable interstellar molecules

Details Indirect observation of unobservable interstellar molecules Indirect observation of unobservable interstellar molecules

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...215..503h&link_type=abstract

Astrophysical Journal, Part 1, vol. 215, July 15, 1977, p. 503-510. Research supported by the College of William and Mary and P

Astronomy and Astrophysics

Astronomy

40

Abundance, Interstellar Gas, Molecular Gases, Molecular Ions, Radio Observation, Acetylene, Carbon, Carbon Dioxide, Free Radicals, Methane, Nitrogen, Oxygen, Radio Astronomy

Scientific paper

It is suggested that the abundances of neutral nonpolar interstellar molecules unobservable by radio astronomy can be systematically determined by radio observation of the protonated ions. As an example, observed N2H(+) column densities are analyzed to infer molecular nitrogen abundances in dense interstellar clouds. The chemistries and expected densities of the protonated ions of O2, C2, CO2, C2H2, and CH4 are then discussed. Microwave transition frequencies for HCO2(+) and C2H3(+) are estimated, and a preliminary astronomical search for HCO2(+) is described.

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