Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...221..385b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 221, no. 2, Sept. 1989, p. 385-395.
Astronomy and Astrophysics
Astrophysics
14
Ionization, Stellar Evolution, Supernova Remnants, White Dwarf Stars, X Ray Sources, Abundance, Brightness Distribution, Exosat Satellite, Stellar Spectra, Thermal Emission
Scientific paper
A detailed numerical study of the X-ray emission of Tycho's supernova remnant which, at an age of about 430 years, has not yet reached its adiabatic phase of expansion. The carbon deflagration of a C + O white dwarf, which seems to be the most plausible model for type Ia supernova explosions, results in a highly nonsolar abundance distribution, which influences the hydrodynamical evolution of the remnant considerably. Using Nomoto's W7 model of an exploding white dwarf as initial condition, the hydrodynamical and ionization evolution for different densities of the interstellar medium are followed simultaneously and the emitted spectra are compared with Exosat GSPC observations. The results indicate that the density of the ambient medium is between 0.5 and 1.0/cu cm; the distance of Tycho is then about 3 kpc.
Brinkmann Wolfgang
Fink Henner
Haberl Franck
Smith Aaron
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