MUSEQuBES: characterizing the circumgalactic medium of redshift ?3.3 Ly ? emitters

We present the first characterization of circumgalactic medium Ly$\alpha$ emitters (LAEs), using a sample 96 $z\approx3.3$ LAEs detected with VLT/MUSE in fields centered on 8 bright background quasars. The have low luminosities ($\sim 10^{42}\,\text{erg}\,\text{s}^{-1}$) and star formation rates (SFRs) $\sim 1~\text{M}_\odot\,\text{yr}^{-1}$, which for main sequence galaxies corresponds to stellar masses only 10^{8.6}\,\text{M}_\odot$. median transverse distance between quasar sightlines is 165 proper kpc (pkpc). stacked high-resolution spectra measured significant excess HI CIV absorption near out 500 $\text{km}\,\text{s}^{-1}$ at least $\approx 250$ pkpc (corresponding 7$ virial radii). At $\lesssim 30~\text{km}\,\text{s}^{-1}$ from optical depths are enhanced by an order magnitude. significantly stronger around 1/3$ our that part `groups', we attribute large-scale structures they embedded. do not detect any strong dependence either or (over range 50-250$ pkpc), redshift, properties emission line (luminosity, full width half maximum, equivalent width). However, HI, but CIV, 100\,\text{km}\,\text{s}^{-1}$ LAE does increase SFR. This suggests surrounded more tend higher SFRs.