Browsing Research publications by Author "Gürkan, Gülay"

Now showing items 1-5 of 5

    • Deep ASKAP EMU Survey of the GAMA23 field: Properties of radio sources 

      Gürkan, Gülay; Prandoni, I.; O'Brien, A.; Raja, W.; Marchetti, L.; Vaccari, M.; Driver, S.; Taylor, E.; Franzen, T.; Brown, M. J. I.; Shabala, S.; Andernach, H.; Hopkins, A. M.; Norris, R. P.; Leahy, D.; Bilicki, M.; Farajollahi, H.; Galvin, T.; Heald, G.; Koribalski, B. S.; An, T.; Warhurst, K. (2022-04-11)
      We present the Australian Square Kilometre Array Pathfinder (ASKAP) observations of the Galaxy and Mass Assembly (GAMA)-23h field. The survey was carried out at 887.5 MHz and covers a 83 square degree field. We imaged the ...

    • Finding Rare Quasars: VLA Snapshot Continuum Survey of FRI Quasar Candidates Selected from the LOFAR Two-Metre Sky Survey (LoTSS) 

      Gürkan, Gülay; Croston, Judith; Hardcastle, Martin J.; Mahatma, Vijay; Mingo, Beatriz; Williams, Wendy L. (2021-12-22)
      The radiative and jet power in active galactic nuclei is generated by accretion of material on to supermassive galactic-centre black holes. For quasars, where the radiative power is by definition very high, objects with ...

    • LoTSS/HETDEX: Optical quasars I. Low-frequency radio properties of optically selected quasars 

      Gürkan, Gülay; Hardcastle, Martin; Best, Philip; Morabito, Leah; Prandoni, Isabella; Jarvis, Matt; Duncan, Ken; Rivera, Gabriela Calistro; Callingham, Joe; Cochrane, Rachel; Croston, Judith; Heald, George; Mingo, Beatriz; Mooney, Sean; Sabater, Jose; Röttgering, Huub; Shimwell, Timothy; Smith, Dan; Tasse, Cyril; Williams, Wendy (2018-10-10)
      The radio-loud/radio-quiet (RL/RQ) dichotomy in quasars is still an open question. Although it is thought that accretion onto supermassive black holes in the centre the host galaxies of quasars is responsible for some radio ...

    • A machine-learning classifier for LOFAR radio galaxy cross-matching techniques 

      Alegre, Lara; Sabater, Jose; Best, Philip; Mostert, Rafaël I.~J.; Williams, Wendy L.; Gürkan, Gülay; Hardcastle, Martin J.; Kondapally, Rohit; Shimwell, Tim W.; Smith, Daniel J.~B. (2022-08-30)
      New-generation radio telescopes like LOFAR are conducting extensive sky surveys, detecting millions of sources. To maximize the scientific value of these surveys, radio source components must be properly associated into ...

    • Radio galaxy zoo EMU: towards a semantic radio galaxy morphology taxonomy 

      Bowles, Micah; Tang, Hongming; Vardoulaki, Eleni; Alexander, Emma L.; Luo, Yan; Rudnick, Lawrence; Walmsley, Mike; Porter, Fiona; Scaife, Anna M.~M.; Slijepcevic, Inigo Val; Adams, Elizabeth A.~K.; Drabent, Alexander; Dugdale, Thomas; Gürkan, Gülay; Hopkins, Andrew M.; Jimenez-Andrade, Eric F.; Leahy, Denis A.; Norris, Ray P.; Rahman, Syed Faisal ur; Ouyang, Xichang; Segal, Gary; Shabala, Stanislav S.; Wong, O. Ivy (2023-04-11)
      We present a novel natural language processing (NLP) approach to deriving plain English descriptors for science cases otherwise restricted by obfuscating technical terminology. We address the limitations of common radio ...