Spectroscopic Signature of Radiative Shocks

Radiative Shocks (RS) are shock strong enough that x-ray emitted by the compressed region launch a radiative precursor wave in the uncompressed region. RS can be found in SuperNovae atmospheres, accretion shocks, as well as in laboratory ( $>$ 100 J laser,..) created strong shock. We use state-of-the art opacities and emissivities, to analyze spectral x-ray emission of strong shocks, and to study signatures of the onset of radiative precursor. Departure from a pure Marshak wave is found. Tentative of analysis of experiment on a laser driven radiative shock [1] will be presented. \\[4pt] [1] M. Busquet, F. Thais, E. Audit, M. Gonz\'{a}lez, J. Appl. Phys. 107 (2010) 083302 and references therein; ibid, arXiv:1005.1745vl