Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979phdt.........7l&link_type=abstract
Ph.D. Thesis Colorado Univ., Boulder.
Astronomy and Astrophysics
Astrophysics
4
Astrophysics, Energy Transfer, Gas Flow, Radiative Transfer, Astronomical Models, Binary Stars, Radiant Heating, Shock Waves, Stellar Atmospheres, Ultraviolet Radiation, X Ray Absorption
Scientific paper
Theoretical models for astrophysical shock waves and radiation heated expansion (deflagration-like)waves are presented. The first model described a region which is impulsively heated and accelerated by a shock wave. The gas cools thereafter, primarily by infrared line radiation of H2. The structure of the cooling region is calculated and the values of intial parameters required to match the calculated and observed line strengths are found. The second model is that of an H2 dissociation front caused by UV radiation from a star. The region of dissociation propagates out from a newborn star. The energy balance in the front is controlled by UV absorption and IR emission by the H2 molecules. The heating creates a pressure imbalance and a resulting flow. The emission expected from regions is calculated and the gas dynamical effects on the surrounding material are described. The third model is of a stellar atmosphere which is illuminated by X-rays from its compact companion in an X-ray binary system.
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