New radio observations of the Type IIn Supernova 1978K

: Ryder SD, Kool EC, Kotak R

: J.J. Eldridge, J.C. Bray, L.A.S. McClelland, L. Xiao

: Symposium of the International-Astronomical-Union (IAU)

: 2017

: Proceedings of the International Astronomical Union

: The Lives and Death-Throes of Massive Stars

: LIVES AND DEATH-THROES OF MASSIVE STARS

: IAU SYMP P SERIES

: 12

: S329

: 444

: 1

: 1743-9213

DOI: https://doi.org/10.1017/S1743921317001351

SN 1978K is the oldest-known Type IIn supernova, and one of the closest. We report new radio observations at high frequency and spatial resolution. SN 1978K has been detected at 34 and 94 GHz with the Australia Telescope Compact Array, while Very Long Baseline Interferometry at 8.4 GHz has allowed us to derive the past average expansion velocity, which indicates significant deceleration as the blast wave interacts with the dense circumstellar medium.