The Highest Redshift Quasar at $z=7.085$: A Radio Quiet Source
  We present 1-2 GHz Very Large Array A-configuration continuum observations on
the highest redshift quasar known to date, the $z=7.085$ quasar ULAS
J112001.48+064124.3. The results show no radio continuum emission at the
optical position of the quasar or its vicinity at a level of $\geq 3\sigma$ or
$23.1 \mu$Jy beam$^{-1}$. This $3\sigma$ limit corresponds to a rest frame 1.4
GHz luminosity density limit of $L_{\nu,1.4\,GHz} < 1.76 \times 10^{24}$ W
Hz$^{-1}$ for a spectral index of $\alpha=0$, and $L_{\nu,1.4\,GHz} < 1.42
\times 10^{25}$ W Hz$^{-1}$ for a spectral index of $\alpha=-1$. The rest-frame
1.4 GHz luminosity limits are $L_{rad} < 6.43 \times 10^6 L_{\odot}$ and
$L_{\rm rad} < 5.20 \times 10^7 L_{\odot}$ for $\alpha=0$ and $\alpha=-1$,
respectively. The derived limits for the ratio of the rest frame 1.4 GHz
luminosity density to the $B$-band optical luminosity density are
$R\rlap{}_{1.4}^{*} < 0.53$ and $< 4.30$ for the above noted spectral indices,
respectively. Given our upper limits on the radio continuum emission and the
radio-to-optical luminosity ratio, we conclude that this quasar is radio-quiet
and located at the low end of the radio quiet distribution of high redshift ($z
\gtrsim 6$) quasars.
