Plane parallel and bow-shock models of Herbig-Haro Objects
A model for a bow shock formed around a bullet (which moves supersonically with respect to the surrounding medium) is developed, and is then used to predict position velocity diagrams (i.e., long-slit spectra) and two-dimensional intensity contour maps for several emission lines. In practice, the thesis is divided into two parts: (1) a calculation of stationary, plane-parallel shock-wave models, in which a full treatment of a pre-shock region is included. The emission line spectra of both the pre- and the post-shock regions are predicted. (2) The development of a bow shock model (for a gas with an important radiative energy loss), from which the spatially resolved line spectrum is predicted. A qualitative comparison of the predictions from the blow shock models with recent observations of Herbig-Haro objects HH 1 and HH 32 shows that, at least for these two objects, a good agreement between the observations and the theory of a radiating bow shock is obtained. This seems to indicate that the emission line spectra of these two Herbig-Haro objects are formed (at least to a large extent) in the recombination region behind a bow shock.
- Research Organization:
- Washington Univ., Seattle (USA)
- OSTI ID:
- 7104626
- Country of Publication:
- United States
- Language:
- English
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