Deceleration in the Expansion of SN 1993J

September 1997 • 1997ApJ...486L..31M

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. • Sramek, R. A. • Trigilio, C. • Van Dyk, S. D. • Weiler, K. W. • Whitney, A. R.

Abstract • 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 wavelengths of 3.6 and 6 cm in the period 6-42 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.

Links

• PREPRINT http://arxiv.org/abs/astro-ph/9708262
• NED https://ned.ipac.caltech.edu/uri/NED::InRefcode/1997ApJ...486L..31M
• SPIRES http://inspirehep.net/search?p=find+j+ASJOA,486,L31
• ELECTR https://doi.org/10.1086%2F310830
• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=1997ApJ...486L..31M
• PDF https://iopscience.iop.org/article/10.1086/310830/pdf
• SPIRES http://inspirehep.net/search?p=find+eprint+astro-ph/9708262