Comparisons of interstellar CH+ and H2

Details Comparisons of interstellar CH+ and H2 Comparisons of interstellar CH+ and H2

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242..560f&link_type=abstract

Astrophysical Journal, Part 1, vol. 242, Dec. 1, 1980, p. 560-567. NASA-supported research.

Astronomy and Astrophysics

Astronomy

28

Abundance, Hydrocarbons, Hydrogen, Interstellar Chemistry, Interstellar Gas, Molecular Ions, Absorption Spectra, Astronomical Models, Pleiades Cluster, Spaceborne Astronomy, Spectral Line Width

Scientific paper

Copernicus observations of H2 toward stars in the Pleiades and 23 Orionis have been obtained because of their importance in understanding the formation of interstellar CH(+). No model of CH(+) equilibrium seems to agree very well with these observations; in particular, the suggestions that CH(+) is formed either from collisions between vibrationally excited H2 and C(+) or from radiative association of C(+) and H2 can apparently be excluded. These data do suggest that there is a correlation between the amounts of rotationally excited H2 and CH(+) which are present. Observations of the Pleiades also help interpretations of the reflection nebulae near these stars.

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