|Title:||An investigation of radio supernova remnants and their environments|
|Publisher:||University of Sydney.|
Faculty of Science.
School of Physics.
|Abstract:||In this thesis, I investigate the properties of emission from several supernova remnants (SNRs) and the connections of these observations to the properties of their progenitors, environments, and stages of evolution. I find that the highly-energetic pulsar B1338-62 near the centre of SNR G308.8-0.1 powers a pulsar wind nebula. I conclude that the unusual radio morphology of SNR G308.8-0.1 is best explained by the expansion of a young remnant into an environment with a strongly asymmetric density profile. The coincidence of an extraordinarily well-ordered magnetic field along one high surface-brightness section of SNR B0454-683 with a hydrogen cloud suggests that this segment of the remnant is well-evolved. In this interpretation, the strong compression of ambient magnetic fields by a non-adiabatic shock is responsible for the well-ordered magnetic field and high surface brightness. Using high sensitivity, high angular resolution follow-up observations, I detect the radio counterpart to the X-ray synchrotron shell of the young composite SNR G310.6-1.6. Additionally, I follow up three radio-selected SNR candidates and conclude that they are most likely extragalactic radio sources. I demonstrate that the radio source G296.593-0.975, previously considered an HII region, overlaps along the line-of-sight with middle-aged SNR G296.7-0.9.|
|Access Level:||Access is restricted to staff and students of the University of Sydney . UniKey credentials are required. Non university access may be obtained by visiting the University of Sydney Library.|
|Rights and Permissions:||The author retains copyright of this thesis. It may only be used for the purposes of research and study. It must not be used for any other purposes and may not be transmitted or shared with others without prior permission.|
|Type of Work:||PhD Doctorate|
|Type of Publication:||Doctor of Philosophy Ph.D.|
|Appears in Collections:||Sydney Digital Theses (University of Sydney Access only)|
|2014_William_Robbins_Thesis.pdf||PhD Thesis||31.23 MB||Adobe PDF|