Modeling the Radio Morphology of Supernova 1987A

Details Modeling the Radio Morphology of Supernova 1987A Modeling the Radio Morphology of Supernova 1987A

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21110017n&link_type=abstract

American Astronomical Society, AAS Meeting #211, #100.17; Bulletin of the American Astronomical Society, Vol. 39, p.914

Physics

Scientific paper

Supernova 1987A was the brightest supernova observed in almost 400 years, and has enabled incredibly detailed studies of supernova physics. Radio emission from the ensuing supernova remnant has been increasing rapidly over the last decade, as a result of the collision between the supernova shock and the progenitor's circumstellar medium. 9 GHz imaging observations with the Australia Telescope Compact Array are able to spatially resolve the emission, and show an expanding limb-brightened shell structure. Here we present detailed spatial modeling of SN 1987A's radio morphology. We have developed an inclined torus model incorporating a light travel time correction, which we use to fit the interferometric visibilities of the source in the Fourier domain. This allows us to extract physical parameters at each epoch such as the radius of the shock, the torus geometry and the degree of asymmetry in the remnant. We will present the resulting time evolution of the shock properties over the period 1992 to 2006.
The Australia Telescope Compact Array is part of the Australia Telescope which is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO.

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