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Title:
A Radio-Continuum Study of the Supernova Remnant MSH 11-61A
Authors:
Filipovic, M. D.; Payne, J. L.; Jones, P. A.
Affiliation:
AA(University of Western Sydney, Locked Bag 1797, Penrith South DC NSW 1797, Australia) AB(Centre for Astronomy, James Cook University, Townsville QLD 4811, Australia) AC(Australia Telescope National Facility, CSIRO, P.O. Box 76, Epping NSW 1710, Australia)
Publication:
Serbian Astronomical Journal, Vol. 170, p. 47-56 (http://saj.matf.bg.ac.yu/) (SerAJ Homepage)
Publication Date:
06/2005
Origin:
SerAJ
Keywords:
ISM: individual objects (MSH 11-61A, G290.1-0.8), ISM: supernova remnants, radio continuum: ISM
DOI:
10.2298/SAJ0570047F
Bibliographic Code:
2005SerAJ.170...47F

Abstract

We present a high-resolution radio-continuum study of Galactic supernova remnant MSH 11-61A. We combine moderate resolution X-ray, radio-continuum and CO data to study the morphology and kinematics of MSH 11-61A. We estimate the radio-continuum spectral index to be alpha843-4850=-0.33 +- 0.07 based on our flux density measurements and also note that this SNR has significant `turn-over' spectra at lower (29.9-843 MHz) frequencies. The diameter of MSH 11-61A is estimated to be 12.5 arcmin with `ear' extensions of 4 arcmin to the northwest and southeast. The striking anticorrelation between X-ray and radio-continuum images confirms a mixed-morphology classification of this remnant. The CO images are consistent with a distance reported by Rosado et al. (1996) of about 7 kpc.

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