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Johnston-Hollitt, Melanie

Visiting Fellows in Sciences

Research field

Astrophysics of galaxy clusters: from individual tailed radio galaxies andtheir evolution, to cluster dynamics, including processes leading to theirformation, growth and evolution. Observations carried out with the majorradio interferometric facilities. Scientific and technical requirementsfor the next generation of radio telescopes.


Professor at the Physics School of Chemical and Physical Sciences

Research interests:
I am interested in understanding both how the Universe behaves on thelargest scales and which new tools will be required to answer outstandingquestions about it. I research galaxy clusters, the largestgravitationally bound objects in the Universe, cosmic magnetism and designaspects of the next generation of radio telescopes.
My group has recently adopted a multiwavelength approach to understandingclusters and superclusters. We are using several of the world’s best radiotelescopes in Australia, the US and India (MWA, ATCA, VLA and GMRT).Optical data and X-ray images from the ESA XMM-Newton satellite are usedto understand how cluster mergers (the most energetic events since the BigBang), shape the galaxies within them.
Current projects include
understanding the role environment plays on the generation and evolutionof radio galaxies;multiwavelength investigations of cluster dynamics (radio, X-ray and optical)using head-tailed galaxies barometers to measure the largest 'weathersystems' in the Universescientific and technical requirements for the next generation of radiotelescopes.
Colleagues and students I have the opportunity to work with are in Italy,France, Australia and India.

Structure Department of Chemical & Physical Sciences (Associate Professor)

Victoria University od Wellington

Wellington,  New Zealand

Unibo reference

Prof. Daniele Dallacasa

Dipartimento di Fisica e Astronomia