%0 Generic %1 muzahid2021musequbes %A Muzahid, Sowgat %A Schaye, Joop %A Cantalupo, Sebastiano %A Marino, Raffaella Anna %A Bouche, Nicolas F. %A Johnson, Sean %A Maseda, Michael %A Wendt, Martin %A Wisotzki, Lutz %A Zabl, Johannes %D 2021 %K library %T MUSEQuBES: Characterizing the circumgalactic medium of redshift $\approx3.3$ Ly$\alpha$ emitters %U http://arxiv.org/abs/2105.05260 %X We present the first characterization of the diffuse gas and metals in the circumgalactic medium of 96 z = 2.9-3.8 Ly$\alpha$ emitters (LAEs) detected with the Multi-Unit Spectroscopic Explorer (MUSE) in fields centered on 8 bright background quasars as part of our MUSEQuBES survey. The LAEs have relatively low Ly$\alpha$ luminosities (~$10^42$ erg/s) and star formation rates ~1 $M_ødot$/yr, which for main sequence galaxies corresponds to stellar masses of only ~$10^8.6$ $M_ødot$. The median transverse distance between the LAEs and the quasar sightlines is 165 proper kpc (pkpc). We stacked the high-resolution quasar spectra and measured significant excess HI and CIV absorption near the LAEs out to 500 km/s and at least 250 pkpc (corresponding to ~7 virial radii). At < 30 km/s from the galaxies the median HI and CIV optical depths are enhanced by an order of magnitude. The average rest-frame equivalent width of Ly$\alpha$ absorption is comparable to that for Lyman-break galaxies (LBGs) at z~2.3 and ~L* galaxies at z~0.2, but considerably higher than for sub-L*/dwarf galaxies at low redshift. The CIV equivalent width is comparable to those measured for low-z dwarf galaxies and z~2.3 LBGs but significantly lower than for z~2.3 quasar-host galaxies. The absorption is significantly stronger around the ~ 1/3 of our LAEs that are part of "groups", which we attribute to the large-scale structures in which they are embedded. We do not detect any strong dependence of either the HI or CIV absorption on transverse distance (over the range 50-250 pkpc), redshift, or the properties of the Ly$\alpha$ emission line (luminosity, full width at half maximum, or equivalent width). However, for HI, but not CIV, the absorption at < 100 km/s from the LAE does increase with the star formation rate. This suggests that LAEs surrounded by more neutral gas tend to have higher star formation rates.

@misc{muzahid2021musequbes, abstract = {We present the first characterization of the diffuse gas and metals in the circumgalactic medium of 96 z = 2.9-3.8 Ly$\alpha$ emitters (LAEs) detected with the Multi-Unit Spectroscopic Explorer (MUSE) in fields centered on 8 bright background quasars as part of our MUSEQuBES survey. The LAEs have relatively low Ly$\alpha$ luminosities (~$10^{42}$ erg/s) and star formation rates ~1 $M_\odot$/yr, which for main sequence galaxies corresponds to stellar masses of only ~$10^{8.6}$ $M_{\odot}$. The median transverse distance between the LAEs and the quasar sightlines is 165 proper kpc (pkpc). We stacked the high-resolution quasar spectra and measured significant excess HI and CIV absorption near the LAEs out to 500 km/s and at least 250 pkpc (corresponding to ~7 virial radii). At < 30 km/s from the galaxies the median HI and CIV optical depths are enhanced by an order of magnitude. The average rest-frame equivalent width of Ly$\alpha$ absorption is comparable to that for Lyman-break galaxies (LBGs) at z~2.3 and ~L* galaxies at z~0.2, but considerably higher than for sub-L*/dwarf galaxies at low redshift. The CIV equivalent width is comparable to those measured for low-z dwarf galaxies and z~2.3 LBGs but significantly lower than for z~2.3 quasar-host galaxies. The absorption is significantly stronger around the ~ 1/3 of our LAEs that are part of "groups", which we attribute to the large-scale structures in which they are embedded. We do not detect any strong dependence of either the HI or CIV absorption on transverse distance (over the range 50-250 pkpc), redshift, or the properties of the Ly$\alpha$ emission line (luminosity, full width at half maximum, or equivalent width). However, for HI, but not CIV, the absorption at < 100 km/s from the LAE does increase with the star formation rate. This suggests that LAEs surrounded by more neutral gas tend to have higher star formation rates.}, added-at = {2021-05-13T06:42:59.000+0200}, author = {Muzahid, Sowgat and Schaye, Joop and Cantalupo, Sebastiano and Marino, Raffaella Anna and Bouche, Nicolas F. and Johnson, Sean and Maseda, Michael and Wendt, Martin and Wisotzki, Lutz and Zabl, Johannes}, biburl = {https://www.bibsonomy.org/bibtex/2a01a65a9330a07b0dae9216c19efb7a4/gpkulkarni}, description = {MUSEQuBES: Characterizing the circumgalactic medium of redshift $\approx3.3$ Ly$\alpha$ emitters}, interhash = {6016c9d241c28e164797596d067d655e}, intrahash = {a01a65a9330a07b0dae9216c19efb7a4}, keywords = {library}, note = {cite arxiv:2105.05260Comment: Submitted to MNRAS (23 pages + appendices, 20 figures)}, timestamp = {2021-05-13T06:42:59.000+0200}, title = {MUSEQuBES: Characterizing the circumgalactic medium of redshift $\approx3.3$ Ly$\alpha$ emitters}, url = {http://arxiv.org/abs/2105.05260}, year = 2021 }