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Title:
The VELA supernova remnant and the GUM nebula: new perspectives at 2.4 GHz
Authors:
Duncan, A. R.; Stewart, R. T.; Haynes, R. F.; Jones, K. L.
Affiliation:
AA(Physics Department, The University of Queensland, 4072, Australia ), AB(Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 2121, Australia ), AC(Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 2121, Australia ), AD(Physics Department, The University of Queensland, 4072, Australia )
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 280, Issue 1, pp. 252-266. (MNRAS Homepage)
Publication Date:
05/1996
Origin:
MNRAS
MNRAS Keywords:
POLARIZATION, ISM: BUBBLES, ISM: INDIVIDUAL: GUM NEBULA, ISM: INDIVIDUAL: G 240.9-0.9, ISM: INDIVIDUAL: VELA SNR, SUPERNOVA REMNANTS
Bibliographic Code:
1996MNRAS.280..252D

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.

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