University of Hertfordshire

By the same authors

The spectral structure and energetics of powerful radio sources

Research output: Contribution to conferencePaper

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    Accepted author manuscript, 141 KB, PDF document

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Original languageEnglish
Publication statusPublished - 29 Apr 2014
EventThe Metre Wavelength Sky - Pune, India
Duration: 9 Dec 201313 Dec 2013

Conference

ConferenceThe Metre Wavelength Sky
CountryIndia
CityPune
Period9/12/1313/12/13

Abstract

Determining the energy spectrum of an electron population can give key insights into the underlying physics of a radio source; however, the lack of high resolution, broad-bandwidth observations has left many ambiguities in our understanding of radio galaxies. The improved capabilities of telescopes such as the JVLA and LOFAR mean that within the bandwidth of any given observation, a detailed spectral shape can now be produced. We present recent investigations of powerful FR-II radio galaxies at GHz and MHz frequencies and show for the first time their small-scale spectral structure. We highlight problems in traditional methods of analysis and demonstrate how these issues can now be addressed. We present the latest results from low frequency studies which suggest a potential increase in the total energy content of radio galaxy lobes with possible implications for the energetics of the population as a whole.

Notes

J. J. Harwood, M J. Hardcastle, J. H. Croston, A. Stroe, R. Morganti, and E. Orru, 'The spectral structure and energetics of powerful radio sources', paper presented at The Metre Wavelength Sky: Celebrating 50 years of Radio Astronomy at TIFR and 10 years of GMRT. Pune, India, 9-13 December 2013

ID: 11833173