Search results for "SN1979C"

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Strongly decelerated expansion of SN 1979C

2002

We observed SN1979C in M100 on 4 June 1999, about twenty years after explosion, with a very sensitive four-antenna VLBI array at the wavelength of 18cm. The distance to M100 and the expansion velocities are such that the supernova cannot be fully resolved by our Earth-wide array. Model-dependent sizes for the source have been determined and compared with previous results. We conclude that the supernova shock was initially in free expansion for 6 +/- 2 yrs and then experienced a very strong deceleration. The onset of deceleration took place a few years before the abrupt trend change in the integrated radio flux density curves. We estimate the shocked swept-up mass to be about 1.6 solar masse…

InterferometricSupernova remnantsAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsSN1979CUNESCO::ASTRONOMÍA Y ASTROFÍSICAAstrophysicsBinary starVery-long-baseline interferometryFree expansionAstrophysics::Solar and Stellar AstrophysicsISMAstrophysics::Galaxy AstrophysicsEnvelope (waves)PhysicsAstrophysics (astro-ph)Astronomy and AstrophysicsGalaxiesStars:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]GalaxyRadio continuumSupernovaStarsWavelengthSupernovaeInterferometric ; Supernovae ; SN1979C ; ISM ; Supernova remnants ; Radio continuum ; Stars ; M100 ; GalaxiesSpace and Planetary ScienceM100Astrophysics::Earth and Planetary AstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]Astronomy & Astrophysics
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