Search results for "Type II supernova"

showing 2 items of 12 documents

The three-ring structure of Supernova 1987A

1995

PhysicsSupernovaHubble Deep FieldStructure (category theory)AstronomyAstrophysicsRing (chemistry)Type II supernovaNear-Earth supernovaMonthly Notices of the Royal Astronomical Society
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The role of synchrotron self-absorption in the late radio emission of SN1993J

2001

The standard model for radio supernovae considers that the observed synchrotron radio emission arises from the high-energy shell that results from the strong interaction between the expanding supernova ejecta and the circumstellar medium. This emission is considered to be only partially absorbed by ionized thermal electrons in the circumstellar wind of the progenitor star. Based on a study of the radio light curves of the type II supernova SN1993J, we present evidence of synchrotron self-absorption. Our modeling of the radio light curves requires a large initial magnetic field, of about 30 Gauss, and the existence of an (initially) highly-relativistic population of electrons. We also show t…

Physicseducation.field_of_studyAstrophysics::High Energy Astrophysical PhenomenaPopulationAstrophysics (astro-ph)FOS: Physical sciencesAstronomy and AstrophysicsElectronAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsType II supernovaLight curveAstrophysicsSynchrotronlaw.inventionSupernovaSpace and Planetary SciencelawIonizationAstrophysics::Solar and Stellar AstrophysicsAbsorption (electromagnetic radiation)educationAstrophysics::Galaxy Astrophysics
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