Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...378..202c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 378, Sept. 1, 1991, p. 202-213. Research supported by NSERC and Connaught F
Astronomy and Astrophysics
Astrophysics
23
Hydrogen, Infrared Spectra, Interstellar Matter, Molecular Collisions, Shock Wave Interaction, Electron States, Energy Levels, Line Spectra
Scientific paper
The cooling flow behind a nonmagnetic partially dissociative jump shock is investigated. Shocks with a wide range of initial velocities and densities, including those in which the populations of the (v J) levels are far from Boltzmann equilibrium, are examined. The evolution of the physical properties of the cooling flow and its line emission is traced. Initial shock densities are determined at about 10 to the 7th/cu cm, and an insensitivity to velocity ranging from about 12 km/s up to the dissociation limit of 12 km/s is established. These models are generally consistent qualitatively with the view that the populations of the levels giving rise to these lines have been 'thermalized' in a high-density postshock gas Burton et al. (1988). Eventual improvements in shock models which are needed for former quantitative analysis are discussed.
Chang Allen C.
Martin Peter G.
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