| We propose 22 and 8.4 GHz VLBI observations to continue imaging the complex and frequency-dependent structure
of supernova 1986J, and to track the unprecedented emergence of its central source. This recently discovered inverted-
spectrum source in the center of the shell is likely associated with a neutron star or black hole, and if so is the first
observational link between a modern supernova with a compact stellar remnant. These observations will allow us to
confirm the double structure of the central component seen in our 22 GHz image from 2005, and help understand
nature of the mysterious central source. An exciting possibility, raised by the apparent double structure, is that the
central source has a jet-like morphology, possibly associated with a black-hole accretion system. We will accurately
measure the proper motions of the central source to determine whether they are as rapid as might expected of a
jet source. We will also make a 22/8.4 GHz spectral index map to determine the spectral indices of the central
source, the hot-spot in the shell, and the remainder of the shell, which will distinguish di#erent particle acceleration
mechanisms. |
