Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aipc..211...48b&link_type=abstract
IN: High-energy astrophysics in the 21st century; Proceedings of the Workshop, Taos, NM, Dec. 11-14, 1989 (A91-47977 20-90). New
Astronomy and Astrophysics
Astrophysics
Gamma Ray Spectra, Stellar Physics, Supernova 1987A, Line Spectra, Nuclear Astrophysics, X Ray Spectra
Scientific paper
A series of Monte Carlo investigations is reviewed to demonstrate the potential use of gamma-ray and hard X-ray data to probe Type Ia supernova physics. The model W7A is emphasized which combines the mixing prescription of Branch et al. (1985) and considers the elements between an enclosed mass of 0.7 solar mass and the inner edge of the outer C/O mantle at 1.25 solar mass as if they were homogeneous. The nucleosynthesis and the velocity and mass-density profiles affect the continuum and line emissions during the explosion. The behavior of the integral luminosities is given, showing that photons exceed gamma-ray radiation for up to day 20, and the gamma-ray and hard X-ray continuum lines are tracked until up to about 500 days. The characteristics demonstrated by the Monte Carlo model can aid in the diagnosis of features of supernova explosions, in particular by examining line ratios, line profiles, spectral peaks, X- and gamma-ray turn-on times, and the discontinuity in the X-ray spectrum.
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