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The Lyman Continuum photon production efficiency ($xi_{rm ion}$) is a critical ingredient for inferring the number of photons available to reionise the intergalactic medium. To estimate the theoretical production efficiency in the high-redshift Universe we couple the BlueTides cosmological hydrodynamical simulation with a range of stellar population synthesis models. We find Lyman Continuum photon production efficiencies of $log_{10}(xi_{rm ion}/{rm erg^{-1}, Hz})approx 25.1-25.5$ depending on the choice of stellar population synthesis model. These results are broadly consistent with recent observational constraints at high-redshift though favour a model incorporating the effects of binary evolution
We have recently discovered five Lyman continuum leaking galaxies at z~0.3, selected for their compactness, intense star-formation, and high [OIII]/[OII] ratio (Izotov et al. 2016ab). Here we derive their ionizing photon production efficiency, a fund
We present the first measurements of the Lyman-continuum photon production efficiency $xi_{textrm{ion,0}}$ at $zsim4$-5 for galaxies fainter than 0.2 $L^*$ ($-$19 mag). $xi_{textrm{ion,0}}$ quantifies the production rate of ionizing photons with resp
We present semi-analytical models of high redshift Lyman-{alpha} emitters (LAEs) in order to constrain the star formation efficiency in those galaxies. Our supernova feedback induced star formation model along with Sheth-Tormman halo mass function co
Following our first detection reported in Izotov et al. (2016), we present the detection of Lyman continuum (LyC) radiation of four other compact star-forming galaxies observed with the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Teles
Hydrogen Lyman-$alpha$ (Ly$alpha$) emission has been one of the major observational probes for the high redshift universe, since the first discoveries of high-$z$ Ly$alpha$ emitting galaxies in the late 1990s. Due to the strong Ly$alpha$ emission ori