University of Hertfordshire

From the same journal

From the same journal

By the same authors


  • 1811.07932v1

    Accepted author manuscript, 445 KB, PDF document

  • H. R. Stacey
  • J. P. McKean
  • N. J. Jackson
  • P. N. Best
  • G. Calistro Rivera
  • J. R. Callingham
  • K. J. Duncan
  • G. Gürkan
  • M. J. Hardcastle
  • M. Iacobelli
  • A. P. Mechev
  • L. K. Morabito
  • I. Prandoni
  • H. J. A. Röttgering
  • J. Sabater
  • T. W. Shimwell
  • C. Tasse
  • W. L. Williams
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Original languageEnglish
JournalAstronomy & Astrophysics
Early online date19 Nov 2018
Publication statusE-pub ahead of print - 19 Nov 2018


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 radio-quiet quasars SDSS J1055+4628, SDSS J1313+5151 and SBS 1520+530 at 144 MHz that fall in the HETDEX Spring Field targeted in the LOFAR Two-metre Sky Survey (LoTSS) first full data release. We compare their radio and far-infrared luminosities relative to the radio-infrared correlation and find that their radio luminosities can be explained by star formation. The implied star formation rates derived from their radio and infrared luminosities are between 20 and 300 $\rm{M_{\odot}~yr^{-1}}$. These detections represent the first study of gravitationally lensed sources with LOFAR, opening a new frequency window for investigating the star-forming properties of high-redshift quasars at radio wavelengths. We consider the implications for future data releases and estimate that many of the objects in our parent sample will be detected during LoTSS, significantly increasing the fraction of gravitationally lensed radio-quiet quasars with radio detections.


7 figures, 2 tables and 10 pages. This paper is part of the LOFAR surveys data release 1 and has been accepted for publication in a special edition of A&A that will appear in Feb 2019, volume 622. The catalogues and images from the data release will be publicly available on upon publication of the journal. Reproduced with permission from Astronomy & Astrophysics. © 2019 ESO.


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