Browsing Research publications by Author "Gürkan, G."

Now showing items 21-27 of 27

    • LoTSS DR1 : Double-double radio galaxies in the HETDEX field 

      Mahatma, V. H.; Hardcastle, M. J.; Williams, W. L.; Best, P. N.; Croston, J. H.; Duncan, K.; Mingo, B.; Morganti, R.; Brienza, M.; Cochrane, R. K.; Gürkan, G.; Harwood, J. J.; Jarvis, M. J.; Jamrozy, M.; Jurlin, N.; Morabito, Leah K.; Röttgering, H. J. A.; Sabater, J.; Shimwell, T. W.; Smith, D. J. B.; Shulevski, A.; Tasse, C. (2018-11-20)
      Double-double radio galaxies (DDRGs) represent a short but unique phase in the life-cycle of some of the most powerful radio-loud active galactic nuclei (RLAGN). These galaxies display large-scale remnant radio plasma in ...

    • The LoTSS view of radio AGN in the local Universe. The most massive galaxies are always switched on 

      Sabater, J.; Best, P.N.; Hardcastle, M. J.; Shimwell, T. W.; Tasse, C.; Williams, W. L.; Brüggen, M.; Cochrane, R. K.; Croston, J. H.; Gasperin, F. de; Duncan, K. J.; Gürkan, G.; Mechev, A. P.; Morabito, Leah K.; Prandoni, I.; Röttgering, H. J. A.; Smith, D. J. B.; Harwood, J. J.; Mingo, B.; Mooney, S.; Saxena, A. (2018-11-15)
      This paper presents a study of the local radio source population, by cross-comparing the data from the first data release (DR1) of the LOFAR Two-Metre Sky Survey (LoTSS) with the Sloan Digital Sky Survey (SDSS) DR7 main ...

    • LoTSS/HETDEX: Disentangling star formation and AGN activity in gravitationally-lensed radio-quiet quasars 

      Stacey, H. R.; McKean, J. P.; Jackson, N. J.; Best, P. N.; Rivera, G. Calistro; Callingham, J. R.; Duncan, K. J.; Gürkan, G.; Hardcastle, M. J.; Iacobelli, M.; Mechev, A. P.; Morabito, L. K.; Prandoni, I.; Röttgering, H. J. A.; Sabater, J.; Shimwell, T. W.; Tasse, C.; Williams, W. L. (2018-11-19)
      Determining the star-forming properties of radio-quiet quasars is important for understanding the co-evolution of star formation and black hole accretion. Here, we present the detection of the gravitationally-lensed ...

    • Nearby galaxies in the LOFAR Two-metre Sky Survey : I. Insights into the non-linearity of the radio–SFR relation 

      Heesen, V.; Staffehl, M.; Basu, A.; Beck, R.; Stein, M.; Tabatabaei, F. S.; Hardcastle, M. J.; Chyży, K. T.; Shimwell, T. W.; Adebahr, B.; Beswick, R.; Bomans, D. J.; Botteon, A.; Brinks, E.; Brüggen, M.; Dettmar, R. -J.; Drabent, A.; Gasperin, F. de; Gürkan, G.; Heald, G. H.; Horellou, C.; Nikiel-Wroczynski, B.; Paladino, R.; Piotrowska, J.; Röttgering, H. J. A.; Smith, D. J. B.; Tasse, C. (2022-08-08)
      Context. Cosmic rays and magnetic fields are key ingredients in galaxy evolution, regulating both stellar feedback and star formation. Their properties can be studied with low-frequency radio continuum observations, free ...

    • The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey 

      Morabito, L. K.; Matthews, J. H.; Best, P. N.; Gürkan, G.; Jarvis, M. J.; Prandoni, I.; Duncan, K. J.; Hardcastle, M. J.; Kunert-Bajraszewska, M.; Mechev, A. P.; Mooney, S.; Sabater, J.; Röttgering, H. J. A.; Shimwell, T. W.; Smith, D. J. B.; Tasse, C.; Williams, W. L. (2018-08-16)
      We present a study of the low-frequency radio properties of broad absorption line quasars (BALQSOs) from the LOFAR Two-metre Sky-Survey Data Release 1 (LDR1). The value-added LDR1 catalogue contains Pan-STARRS counterparts, ...

    • V-LoTSS: The circularly polarised LOFAR Two-metre Sky Survey 

      Callingham, J.~R.; Shimwell, T.~W.; Vedantham, H.~K.; Bassa, C.~G.; O'Sullivan, S.~P.; Yiu, T.~W.~H.; Bloot, S.; Best, P.~N.; Hardcastle, M.~J.; Haverkorn, M.; Kavanagh, R.~D.; Lamy, L.; Pope, B.~J.~S.; Röttgering, H.~J.~A.; Schwarz, D.~J.; Tasse, C.; van Weeren, R.~J.; White, G.~J.; Zarka, P.; Bomans, D.~J.; Bonafede, A.; Bonato, M.; Botteon, A.; Bruggen, M.; Chyży, K.~T.; Drabent, A.; Emig, K.~L.; Gloudemans, A.~J.; Gürkan, G.; Hajduk, M.; Hoang, D.~N.; Hoeft, M.; Iacobelli, M.; Kadler, M.; Kunert-Bajraszewska, M.; Mingo, B.; Morabito, L.~K.; Nair, D.~G.; Pérez-Torres, M.; Ray, T.~P.; Riseley, C.~J.; Rowlinson, A.; Shulevski, A.; Sweijen, F.; Timmerman, R.; Vaccari, M.; Zheng, J. (2023-02-17)
      We present the detection of 68 sources from the most sensitive radio survey in circular polarisation conducted to date. We used the second data release of the 144 MHz LOFAR Two-metre Sky Survey to produce circularly polarised ...

    • The wide-field infrared survey explorer properties of complete samples of radio-loud active galactic nucleus 

      Gürkan, G.; Hardcastle, M.J.; Jarvis, M.J. (2014-03-01)
      We present an analysis of four complete samples of radio-loud active galactic nucleus (AGN; 3CRR, 2Jy, 6CE and 7CE) using near- and mid-IR data taken by theWide-field Infrared Survey Explorer (WISE). The combined sample ...