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We present six galaxies at z~2 that show evidence of Lyman continuum (LyC)emission based on the newly acquired UV imaging of the Hubble Deep UV legacysurvey (HDUV) conducted with the WFC3/UVIS camera on the Hubble Space Telescope(HST). At the redshift of these sources, the HDUV F275W images partially probethe ionizing continuum. By exploiting the HST multi-wavelength data availablein the HDUV/GOODS fields, models of the UV spectral energy distributions, anddetailed Monte Carlo simulations of the intergalactic medium absorption, weestimate the absolute ionizing photon escape fractions of these galaxies to bevery high -- typically >60% (>13% for all sources at 90% likelihood). Ourfindings are in broad agreement with previous studies that found only a smallfraction of galaxies to show high escape fraction. These six galaxies comprisethe largest sample yet of LyC leaking candidates at z~2 whose inferred LyC fluxhas been cleanly observed at HST resolution. While three of our six candidatesshow evidence of hosting an active galactic nucleus (AGN), two of these areheavily obscured and their LyC emission appears to originate from star-formingregions rather than the central nucleus. This suggests an AGN-aided pathway forLyC escape from these sources. Extensive multi-wavelength data in the GOODSfields, especially the near-IR grism spectra from the 3D-HST survey, enable usto study the candidates in detail and tentatively test some recently proposedindirect methods to probe LyC leakage -- namely, the [OIII]/[OII] line ratioand the H$\beta-$UV slope diagram. High-resolution spectroscopic followup ofour candidates will help constrain such indirect methods which are our onlyhope of studying $f_{esc}$ at z~5-9 in the fast-approaching era of the JamesWebb Space Telescope.

The HDUV Survey: Six Lyman Continuum Emitter Candidates at z~2 Revealed by HST UV Imaging