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Infrared diagnostics of interstellar shocks (1989)

Hollenbach, D. J. ; Mckee, C. F. ; Chernoff, D. F.

In: CASI

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Publication Date: 2019-06-28

Description: The observations and theoretical models concerning interstellar shock waves are discussed. Interstellar shock waves are generated by the supersonic injection of mass into the interstellar medium by young stellar objects, by stellar winds, and by supernovae. Infrared emission lines from the heated, shocked gas provide valuable diagnostics of the density, temperature, velocity field, elemental abundances and extent of the emitting region. It is shown that the comparison of observed spectra from shocked regions with theoretical shock models can provide an estimate of the shock speed and the physical conditions in the preshock gas, including the ionization fraction and the magnetic field strength.

Keywords: ASTRONOMY

Type: ESA, Infrared Spectroscopy in Astronomy; p 245-258

Format: text

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