6533b7d6fe1ef96bd1267098
RESEARCH PRODUCT
Deceleration in the Expansion of SN 1993J
Richard A. SramekEduardo RosPhilip J. DiamondCorrado TrigilioF. MantovaniMiguel A. Pérez-torresRobert A. PrestonDayton L. JonesAntonio AlberdiJ. C. GuiradoJ. M. MarcaideAlan R. WhitneyRichard SchilizziK. W. WeilerS. D. Van DykIrwin I. Shapirosubject
Physics010504 meteorology & atmospheric sciencesAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)FOS: Physical sciencesAstronomyAstronomy and AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsAstrophysics01 natural sciencesConstant rateSupernovaWavelengthSpace and Planetary Science0103 physical sciencesVery-long-baseline interferometryHigh spatial resolutionAstrophysics::Solar and Stellar AstrophysicsEjecta010303 astronomy & astrophysicsAstrophysics::Galaxy Astrophysics0105 earth and related environmental sciencesdescription
A rarity among supernova, SN 1993J in M81 can be studied with high spatial resolution. Its radio power and distance permit VLBI observations to monitor the expansion of its angular structure. This radio structure was previously revealed to be shell-like and to be undergoing a self-similar expansion at a constant rate. From VLBI observations at the wavelengths of 3.6 and 6 cm in the period 6 to 42 months after explosion, we have discovered that the expansion is decelerating. Our measurement of this deceleration yields estimates of the density profiles of the supernova ejecta and circumstellar material in standard supernova explosion models.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-08-28 | International Astronomical Union Colloquium |