Plane parallel and bow-shock models of Herbig-Haro Objects

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:7104626

Raga, A C

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

Related Subjects

640410* -- Fluid Physics-- General Fluid Dynamics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
EMISSION SPECTRA
ENERGY TRANSFER
FLUIDS
GASES
HEAT TRANSFER
MATHEMATICAL MODELS
RADIANT HEAT TRANSFER
SHOCK WAVES
SPECTRA
TWO-DIMENSIONAL CALCULATIONS