The Evolution of the Central Source in SN 1986J


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.

Name Other * Institution Email Phone
Michael Bietenholz PI York University 416 736-2100 ext 60259
Norbert Bartel York University 416 736-5424
Michael Rupen NRAO - SOC 505 835 7248
* PI = Principal Investigator; CO = Contact author; T = Thesis observations; S = Student

Front Ends
Gregorian X(8.2 to 10.0 GHz) Gregorian K(18.0 to 26.5 GHz)

Back Ends
VLBA recorder and DAR

Type of Observing
Very Long Baseline Interferometry

Switching Type

Processor (correlator)

Allotted time 30.00 hours

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Updated 09/19/2007