The VELA supernova remnant and the GUM nebula: new perspectives at 2.4 GHz
Abstract
Sensitive, polarimetric observations are presented for the region of the Galactic plane 276 deg>=l>=238 deg, with a latitude coverage of +5 deg>=b>=-8 deg over most of this range. These observations were made using the Parkes 64-m radio telescope, at a frequency of 2.4 GHz. Both total-power and polarized emission are detected from the Vela supernova remnant, over an area exceeding 8 deg in diameter. Additionally, a number of features are identified beyond the shell of Vela, which correspond with what appear to be ejecta accelerated by the supernova explosion. Radio emission containing a significant polarized component is detected from the Gum nebula. To account for our observations, both a thermal and a non-thermal component of this emission are therefore required. The discrete SNR G 240.9-0.9 is reinterpreted as a section of this emission from the Gum nebula.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- May 1996
- DOI:
- 10.1093/mnras/280.1.252
- Bibcode:
- 1996MNRAS.280..252D
- Keywords:
-
- POLARIZATION;
- ISM: BUBBLES;
- ISM: INDIVIDUAL: GUM NEBULA;
- ISM: INDIVIDUAL: G 240.9-0.9;
- ISM: INDIVIDUAL: VELA SNR;
- SUPERNOVA REMNANTS