Thwala, Siphiwe Anthony2019-05-282019-05-282018Thwala, Siphiwe Anthony (2018) Search and analysis techniques for extended sources in deep radio surveys, University of the Witwatersrand, Johannesburg, https://hdl.handle.net/10539/27304https://hdl.handle.net/10539/27304A dissertation submitted in ful lment of the requirements for the degree of Master of Science in the School of Physics Faculty of Science , University of the Witwatersrand , August 2018We produced a search for extended radio sources in the LOFAR Two Meter Survey HETDEX Spring Field, and we were able to identify 17 low-brightness sources in a region of 9:5 8:7 , an area of the sky between RA: 10h37m00s to 11h48m00s and DEC: 44 1900000 to 52 5500000. We focus in this study on the poorly studied radio galaxy PGC2285791 presenting a detailed analysis of its core, of the two extended radio lobes, a spectral index map between 141 and 1400 MHz and its multi-frequency association with an IR and optical counterparts. Our results led to the identi cation of this source with a z = 0:14 extended ( 6 arcmin in the S-N direction) radio galaxy with bubble- like radio lobe structures and a morphological similarity in the extended radio structure of PGC2285791 with the remnant radio galaxy B20924+30, except PGC2285791 has a prominent radio core. Future X-ray and millimeter observations will greatly help in understanding the energetics of the radio lobes by measuring the associated inverse Compton scattering on CMB photon emission.Online resource (vii, 70 leaves)enRadio galaxiesGalactic dynamicsThesis