The X-ray spectrum of TYCHO

Details The X-ray spectrum of TYCHO The X-ray spectrum of TYCHO

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...300..713h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 300, Jan. 15, 1986, p. 713-721.

Astronomy and Astrophysics

Astrophysics

57

Abundance, Stellar Mass Ejection, Supernova Remnants, X Ray Sources, X Ray Spectra, Emission Spectra, Interstellar Gas, Stellar Models

Scientific paper

The X-ray spectrum of Tycho's supernova remnant is reanalyzed in the context of a self-consistent model in which the emission arises both from a blast wave into a uniform medium, and from a reverse shock into uniform-density supernova ejecta consisting of pure heavy elements stratified in layers. Detailed nonequilibrium model spectra are computed and fitted to published X-ray spectral data. The results are consistent with a total ejecta mass of 1.4 M_sun;. A satisfactory fit to the spectrum is achieved with a three-layer model of ejecta consisting of an outer layer of carbon or carbon-oxygen, a mixed middle layer containing O, Mg, Al, Si, S, Ar, Ca, Fe, and Ni, and an inner layer of Fe-Ni. The marked difference between the X-ray spectra of Tycho and SN 1006 is attributed mainly to a higher density of the ambient medium around Tycho, which causes the gas in Tycho to be more ionized than in SN 1006.

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