Aannestad and Field 1973

Aannestad, P.A., and G.B. Field, 1973: Hot H₂ and interstellar shocks. Astrophys. J., 186, L29-L32.

The rotational excitation of H₂, molecules by interstellar shock waves is calculated. Level populations integrated through a shock in a cloud of density of 10 cm^-3 have nearly exponential distributions, with effective rotational temperatures T_r = 15 V^1.5° K, where V is the shock velocity in km/s. Ortho-para conversion is effective for high shock velocities, but not for low ones, so that the degree of alternation of intensities of rotational lines in the Lyman absorption band should be correlated with V, and therefore with T_r. The results are compared with observations of Hn rotational levels made by the Copernicus satellite.

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Aannestad, P.A., and Field, G.B.: Hot H₂ and interstellar shocks, Astrophys. J., 186, L29-L32, 1973.

Aannestad, P.A., and G.B. Field (1973), Hot H₂ and interstellar shocks, Astrophys. J., 186, L29-L32.

Aannestad, P.A., and G.B. Field, 1973: Hot H₂ and interstellar shocks. Astrophys. J., 186, L29-L32.

Aannestad, P.A., & Field, G.B. 1973, Astrophys. J., 186, L29.

Aannestad PA, Field GB. Hot H₂ and interstellar shocks, Astrophys J 1973;186:L29-L32.

P.A. Aannestad, G.B. Field, Astrophys. J. 186, L29-L32 (1973).