Physics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...251..259c&link_type=abstract
Astrophysical Journal, Part 1, vol. 251, Dec. 1, 1981, p. 259-265.
Physics
47
Stellar Envelopes, Stellar Radiation, Supernovae, Black Body Radiation, Bremsstrahlung, Emission Spectra, Ion Emission, Iue, Radio Emission, Supergiant Stars
Scientific paper
Although the radiation from a supernova is expected to have as its components an approximately blackbody spectrum and a hot, shocked-gas shell's bremsstrahlung emission, the latter has not yet been directly observed. The bremsstrahlung emission is expected to be orders of magnitude smaller than the sensitivity limit of the instruments aboard the IUE, and the predicted X-ray flux is much less than the upper limit of 1.6 x 10 to the 40th ergs/sec in the 0.1-4.5 keV band found by Palumbo et al. (1981) for SN 1979c after optical maximum. In light of the model proposed the observation of the C IV, Si IV, and N V ultraviolet lines in SN 1979c will provide direct evidence for the presence of bremsstrahlung emission, since it is responsible for the ionization in the circumstellar shell. The physics of the line-forming region of these emissions is further recommended for investigation by its similarity to the physical processes in quasars and OB stars, and around X-ray sources.
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