Expansion of SN 1993J: New λλ6 and 13 cm images

DOI: 
10.1016/S0083-6656(97)00003-2
Publication date: 
01/01/1997
Main author: 
Marcaide, J. M.
IAA authors: 
Alberdi, A.
Authors: 
Marcaide, J. M.;Alberdi, A.;Ros, E.;Diamond, P.;Shapiro, I. I.;Guirado, J. C.;Jones, D. L.;Mantovani, F.;Pérez-Torres, M. A.;Preston, R. A.;Schilizzi, R. T.;Trigilio, C.;Whitney, A. R.
Journal: 
Vistas in Astronomy
Refereed: 
Yes
Publication type: 
Article
Volume: 
41
Pages: 
185-191
Abstract: 
Radio supernovae are rare events among supernovae, usually taking place in distant galaxies. In recent years, great progress has been made in the study of radio supernovae with high angular resolution, due to advances in the VLBI technique and to the lucky occurrence of the powerful supernova SN 1993J in M81 only 3.6 Mpc distant. Its spatial structure has been unveiled and its expansion rate determined at 3.6 cm. Here we present new preliminary VLBI results on the expansion of this supernova at 6 and 13 cm. We resolve the shell at both wavelengths. The size estimates at 6 cm indicate a lower expansion rate than previously estimated. This may be the first evidence of deceleration.
Database: 
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/1997VA.....41..185M/abstract
ADS Bibcode: 
1997VA.....41..185M