Astronomy and Astrophysics – Astrophysics
Scientific paper
1994-12-14
Astronomy and Astrophysics
Astrophysics
9 pages, 8 Postscript figures (not included), uses mn.sty, submitted to MNRAS, revised version. A complete version with figure
Scientific paper
Evolution of fast, radiative shocks in high density medium is presented. Ionizing spectra and approximate broad band light curves of the shocked gas are calculated. Emergent shock spectra, as seen by a distant observer, are obtained from photoionization models. The emergent spectra have a power-law shape $F_{\nu}\propto{\nu}^{-\alpha}$ with mean spectral index $\alpha\sim0.6-1.0$ in the energy range $0.01-10$ keV, and have a high-energy cutoff corresponding to the original shock velocity. It is shown that the models exhibit promising features that may account for some photometric and spectral properties of Active Galactic Nuclei.
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