
%0 Journal Article
%A Manchester, RN 
%T Bi-annular Structure in Supernova Remnants
%J Australian Journal of Physics
%D 1987/12/01
%V 40
%N 6
%P 823-830
%K 
%R https://doi.org/10.1071/PH870823
%U https://www.publish.csiro.au/paper/PH870823 
%X In many supernova remnants the radio structure contains loop features. It is proposed that these loop features are generally due to an enhancement of the shell emission in two co-axial rings. This bi-annu1ar enhancement is closely related to the <;ylindrica1 or barrel morphology possessed by most remnants and is probably formed early in the life of the remnant. 
