6533b853fe1ef96bd12ad52d
RESEARCH PRODUCT
1.6 GHz VLBI observations of SN 1979C: almost-free expansion
Antonio AlberdiJ. M. MarcaideIvan Marti-vidalIvan Marti-vidalEduardo RosEduardo RosK. W. WeilerJ. C. GuiradoMiguel A. Pérez-torressubject
High Energy Astrophysical Phenomena (astro-ph.HE)PhysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)Continuum (measurement)FOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsSupernovaSpace and Planetary ScienceVery-long-baseline interferometryFree expansionBasso continuoAstrophysics - High Energy Astrophysical PhenomenaAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
We report on 1.6 GHz Very-Long-Baseline-Interferometry (VLBI) observations of supernova SN 1979C made on 18 November 2002. We derive a model-dependent supernova size. We also present a reanalysis of VLBI observations made by us on June 1999 and by other authors on February 2005. We conclude that, contrary to our earlier claim of strong deceleration in the expansion, SN 1979C has been undergoing almost-free expansion ($m = 0.91\pm0.09$; $R \propto t^m$) for over 25 years.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-07-16 | Astronomy & Astrophysics |