METAL-ABSORPTION COLUMN DENSITIES IN FAST RADIATIVE SHOCKS

Metal-absorption Column Densities in Fast Radiative Shocks

In this paper we present computations of the integrated metal-ion column densities produced in the post-shock cooling layers behind fast, radiative shock-waves. For this purpose, we have constructed a new shock code that calculates the non-equilibrium ionization and cooling; follows the radiative transfer of the shock self-radiation through the post-shock cooling layers; takes into account the ...

BROAD P v ABSORPTION IN THE QSO PG 1254]047 : COLUMN DENSITIES, IONIZATIONS, AND METAL ABUNDANCES IN BROAD ABSORPTION LINE WINDS FRED HAMANN

This paper discusses the detection of P V jj1118, 1128 and other broad absorption lines (BALs) in archival Hubble Space Telescope spectra of the low-redshift BAL QSO PG 1254]047. The P V identiÐcation is secured by excellent redshift and proÐle coincidences with the other BALs, such as C IV jj1548, 1550 and Si IV jj1393, 1403, and by photoionization calculations showing that other lines near th...

Radiative Shocks in Astrophysics and the Laboratory

This paper explores the variations in radiative shock behavior originating from the properties of the system containing the shock. Specifically, the optical depth of the upstream region and the downstream region both affect the behavior of radiative shocks. Optically thick systems such as stellar interiors or supernovae permit only limited shock-induced increases in density. At the other limit,...

Radiative Hydromagnetic Shocks in Relativistic Outflow Sources

We calculate the structure of a relativistic shock wave in which the internal energy of the shocked fluid is radiated away on a time scale much shorter than the characteristic shock propagation time. The shock is assumed to move through a uniformly magnetized, neutral plasma consisting of protons, electrons, and positrons, and allowance is made for the possible production of electron/positron p...

Oblique radiative shocks, including their interactions with nonradiative polytropic shocks