Infrared diagnostics of interstellar shocks

Details Infrared diagnostics of interstellar shocks Infrared diagnostics of interstellar shocks

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.290..245h&link_type=abstract

In ESA, Infrared Spectroscopy in Astronomy p 245-258 (SEE N90-19084 11-89)

Astronomy and Astrophysics

Astronomy

39

Early Stars, Infrared Spectra, Interstellar Gas, Shock Waves, Stellar Mass Ejection, Emission Spectra, Field Strength, Infrared Radiation, Infrared Signatures, Molecular Spectra, Solar Magnetic Field, Stellar Winds

Scientific paper

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.

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