The CO J = 2-1 emission from the interstellar gas toward Zeta Ophiuchi

Details The CO J = 2-1 emission from the interstellar gas toward Zeta Ophiuchi The CO J = 2-1 emission from the interstellar gas toward Zeta Ophiuchi

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...316l..71c&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 316, May 15, 1987, p. L71-L73. Research supported b

Astronomy and Astrophysics

Astrophysics

16

Absorption Spectra, Carbon Monoxide, Interstellar Gas, Molecular Energy Levels, Molecular Excitation, Signal To Noise Ratios, Galactic Radiation, Interstellar Magnetic Fields, Spectral Resolution

Scientific paper

Measurements of the J = 2→1 transition of 12CO have been obtained with a high signal-to-noise ratio. Two distinct velocity components are seen - one at the velocity of the strongest optically observed atomic lines and a weaker, second component at the velocity of the CH+ absorption line. This second component has a full width at half-intensity of ≡0.4 km s-1, considerably narrower than the CH+ line. These new observations place severe constraints on the shock models used to reproduce the CH+ abundance.

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