SN1993J: Challenging New Insights for Stellar Structure and Supernova Theories

Physics

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Scientific paper

The appearance of supernova SN1993J in our nearby galaxy M81 is an important event in the modern study of supernovae. From the very beginning it created puzzles regarding its supernova type; then in its evolution further puzzles particularly in its spectra, light curve, nature of progenitor, X-ray and γ-ray emission, polarization, etc. Various puzzles have been solved with the help of both theoretical and observational investigations. Still many problems remain. In this present review we examine the gradual development of the various puzzles along with the evolution of SN1993J. We have also presented the unsolved problems as well as the important aspects which are to be measured. We particularly emphasize on the measurements of the shell structure of a radio supernova and of the asymmetry of the scattering envelope as a test to verify the prediction of shell structure in supernova theory i.e. supernova SN1993J will give us an opportunity to verify various aspects of supernova theory.

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