Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...315..251m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 315, April 1, 1987, p. 251-258.
Astronomy and Astrophysics
Astrophysics
2
Astronomical Models, Luminosity, Resonance Scattering, Supernovae, Abundance, Balmer Series, Forbidden Transitions, H Lines, Red Shift
Scientific paper
Type I supernovae exhibit three uniform features, of which the first two are observational: (1) monotonic quasi-exponential light curve; (2) characteristic shifting spectral features; (3) total energy release limited to E0 ≈ 1051ergs. The fluorescence-echo model of Type I supernovae required a total energy of E0 ≈ 1052ergs to explain phenomena (1) and (2); it violated (3). On reconsideration of the energetics it is shown here that resonance scattering of the He II Lyman photons within the circumstellar shell decreases by one order of magnitude the UV excitation energy required to fit the observed features with the echo model. This lowers the total energy required by a factor of 10. The expected values of total energy released during the explosion between the echo model and that of the cobalt decay are now concordant.
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