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dc.contributor.authorEkers, Ronald
dc.date.accessioned2017-01-30T15:31:05Z
dc.date.available2017-01-30T15:31:05Z
dc.date.created2016-02-29T19:30:27Z
dc.date.issued2014
dc.identifier.citationEkers, R. 2014. Non-thermal radio astronomy. Astroparticle Physics. 53 (C): pp. 152-159.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/47079
dc.identifier.doi10.1016/j.astropartphys.2013.05.012
dc.description.abstract

© 2013 Elsevier B.V. All rights reserved. This presentation starts with Karl Jansky's discovery of cosmic radio emission in 1933 and notes the striking similarities to Hess's discovery of cosmic-rays in 1912. At first it was assumed that this radio emission was thermal but in 1939 Grote Reber discovered that it was stronger at longer wavelengths, requiring a non-thermal emission process. These discoveries had a revolutionary impact on astronomy and radio astronomy was born. The interpretation of this non-thermal radiation as synchrotron emission from high energy particles in the interstellar medium did not occur until the late 1940s but then it provided the link between radio astronomy and cosmic-ray research. Ginzburg, in particular, saw that cosmic-ray astrophysics was now possible using radio waves to trace sources of cosmic-rays. We discuss the discovery of extragalactic active galactic nuclei leading to the discovery of quasars and the first evidence for black holes in the nuclei of galaxies. We summarise the present status and future of some of the main radio telescopes used to image the non-thermal emission from external galaxies. Finally, we include a short description of the use of radio signals for the direct detection of cosmic-rays and UHE neutrinos.

dc.titleNon-thermal radio astronomy
dc.typeJournal Article
dcterms.source.volume53
dcterms.source.numberC
dcterms.source.startPage152
dcterms.source.endPage159
dcterms.source.issn0927-6505
dcterms.source.titleAstroparticle Physics
curtin.departmentCurtin Institute of Radio Astronomy (Engineering)
curtin.accessStatusFulltext not available


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