A search for vibrationally excited interstellar H2(+)

Details A search for vibrationally excited interstellar H2(+) A search for vibrationally excited interstellar H2(+)

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...306..255s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 306, July 1, 1986, p. 255-258. NSERC-supported research.

Astronomy and Astrophysics

Astrophysics

6

Hydrogen Ions, Interstellar Gas, Molecular Clouds, Molecular Oscillations, Supernova Remnants, Abundance, Crab Nebula, Molecular Excitation

Scientific paper

The 305 m Arecibo telescope has been used to search for radio-frequency hyperfine transitions of vibrationally excited orthohydrogen ions. The sources observed were two of the shocked molecular clouds in the supernova remnant IC 443 and the interstellar clouds in the line of sight to the Crab Nebula. The best upper limits to the column densities in the observed transitions were ≡1016cm-2, implying a ratio of H2+ to H2 of less than ≡5×10-4.

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