- Strong deceleration in the expansion
of radio supernova SN 1979C,
J. M. Marcaide, E. Ros, M. A. Pérez-Torres, A. Alberdi,
P. J. Diamond, J. C. Guirado, S. D. Van Dyk & K. W. Weiler
Proceedings of the 5th EVN symposium,
147-150 (2000)
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- Abstract
We observed SN 1979C 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 structure cannot be fully resolved by our
Earth-wide array. A model-dependent size for the source has been
determined and compared with previous results. We conclude that the
SN shock was in free expansion for 5-10 years and then experimented
strong deceleration, possibly coincident in time with the abrupt trend
change in the radio total flux density curves.
Eduardo Ros
ros@mpifr-bonn.mpg.de