Sputtering in oblique C-type shocks

Grain-grain collisions and sputtering in oblique C-type shocks

We use a model of the dissipation regions in C-type shocks in which two grain fluids are included to evaluate the rates at which grain-grain collisions and sputtering inject elemental silicon and water into the gas phase. For physical parameters typical of star forming regions, and on the assumption that a substantial fraction of the evaporated silicon is efficiently converted in SiO, the two g...

Parametrization of C-shocks. Evolution of the Sputtering of Grains

Context. The detection of a narrow SiO line emission toward the young shocks of the L1448-mm outflow has been interpreted as a signature of the magnetic precursor of C-shocks. In contrast with the very low SiO abundances (≤10−12) derived from the ambient gas, the narrow SiO emission in the precursor component at almost ambient velocities reveals enhanced SiO abundances of ∼10−11. This enhanceme...

Non-linear Particle Acceleration in Oblique Shocks

The solution of the non-linear diffusive shock acceleration problem, where the pressure of the non-thermal population is sufficient to modify the shock hydrodynamics, is widely recognized as a key to understanding particle acceleration in a variety of astrophysical environments. We have developed a Monte Carlo technique for self-consistently calculating the hydrodynamic structure of oblique, st...

Oblique radiative shocks, including their interactions with nonradiative polytropic shocks

Plasma and Mhd Control of Oblique Shocks

The paper reviews recent studies of supersonic/hypersonic flow and shock wave control using plasma energy addition and magnetohydrodynamics (MHD), focusing on the work by the Princeton University group and their collaborators. Applications include sonic boom mitigation and optimization of scramjet inlets. Experimental and computational studies of interaction of oblique shocks with laser-generat...