SIMBAD references

2001ApJ...548..820B - Astrophys. J., 548, 820-835 (2001/February-3)

Supernova remnants in the Sedov expansion phase: thermal X-ray emission.

BORKOWSKI K.J., LYERLY W.J. and REYNOLDS S.P.

Abstract (from CDS):

Improved calculations of X-ray spectra for supernova remnants (SNRs) in the Sedov-Taylor phase are reported, which for the first time include reliable atomic data for Fe L-shell lines. This new set of Sedov models also allows for a partial collisionless heating of electrons at the blast wave and for energy transfer from ions to electrons through Coulomb collisions. X-ray emission calculations are based on the updated Hamilton-Sarazin spectral model. The calculated X-ray spectra are successfully interpreted in terms of three distribution functions: the electron temperature and ionization timescale distributions, and the ionization timescale-averaged electron temperature distribution. The comparison of Sedov models with a frequently used single nonequilibrium ionization (NEI) timescale model reveals that this simple model is generally not an appropriate approximation to X-ray spectra of SNRs. We find instead that plane-parallel shocks provide a useful approximation to X-ray spectra of SNRs, particularly for young SNRs. Sedov X-ray models described here, together with simpler plane shock and single-ionization timescale models, have been implemented as standard models in the widely used XSPEC v11 spectral software package.

Abstract Copyright:

Journal keyword(s): ISM: Supernova Remnants - X-Rays: ISM

CDS comments: p. 834 : G347.5-0.2 misprint for G347.3-0.5 ?

Simbad objects: 8

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