VLA OBSERVATIONS OF THE SUPERNOVA REMNANT PUPPUS A AT 327 AND 1515 MHZ

We present Very Large Array radio images of Puppis A at 327 and 1515 MHz. The observations were performed with the VLA in the C/D and B/C configurations, respectively. The angular resolution is about 77" x 43". The observed radio shell shows signs of interaction between the expanding shock front and the inhomogeneous surrounding medium. An excellent correlation if found between radio and x-ray emission, mainly towards the NE border of the remnant. There is little correspondence between the optical and radio images, suggesting a different origin for the emission. A region of steeper radio spectral index is associated with the highly decelerated eastern periphery.