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Radio confirmation of Galactic supernova remnant G308.3-1.4 | | A. Y. De Horta
; J. D. Collier
; M. D. Filipovic
; E. J. Crawford
; D. Urosevic
; F. H. Stootman
; N. F. H. Tothill
; | | Date: |
10 Oct 2012 | | Abstract: | We present radio-continuum observations of the Galactic supernova remnant
(SNR) candidate, G308.3-1.4, made with the Australia Telescope Compact Array,
Molonglo Observatory Synthesis Telescope and the Parkes radio telescope. Our
results combined with Chandra X-ray images confirm that G308.3-1.4 is a bona
fide SNR with a shell morphology. The SNR has average diameter of D = 34 +- 19
pc, radio spectral index of alpha = -0.68 +- 0.16 and linear polarisation of 10
+- 1%; We estimate the SNR magnetic field B = 29 uG. Employing a Sigma-D
relation, we estimate a distance to G308.3-1.4 of d = 19 +- 11 kpc. The radio
morphology, although complex, suggests a smaller size for the SNR than
previously implied in an X-Ray study. These results imply that G308.3-1.4 is a
young to middle-aged SNR in the early adiabatic phase of evolution. | | Source: | arXiv, 1210.2781 | | Services: | Forum | Review | PDF | Favorites | |
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