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We have used data from the UKIRT Hemisphere Survey (UHS) to search forsubstellar members of the Hyades cluster. Our search recovered several knownsubstellar Hyades members, and two known brown dwarfs that we suggest may bemembers based on a new kinematic analysis. We uncovered thirteen new substellarHyades candidates, and obtained near-infrared follow-up spectroscopy of eachwith IRTF/SpeX. Six candidates with spectral types between M7 and L0 are ruledout as potential members based on their photometric distances ($\gtrsim$100pc). The remaining seven candidates, with spectral types between L5 and T4, areall potential Hyades members, with five showing strong membership probabilitiesbased on BANYAN $\Sigma$ and a convergent point analysis. Distances and radialvelocities are still needed to confirm Hyades membership. If confirmed, thesewould be some of the lowest mass free-floating members of the Hyades yet known,with masses as low as $\sim$30 $M_{\rm Jup}$. An analysis of all knownsubstellar Hyades candidates shows evidence that the full extent of the Hyadeshas yet to be probed for low-mass members, and more would likely be recoveredwith deeper photometric and astrometric investigations.

Substellar Hyades Candidates from the UKIRT Hemisphere Survey