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