%0 Generic %1 bolan2021inferring %A Bolan, Patricia %A Lemaux, Brian C. %A Mason, Charlotte %A Bradač, Maruša %A Treu, Tommaso %A Strait, Victoria %A Pelliccia, Debora %A Pentericci, Laura %A Malkan, Matthew %D 2021 %K library %T Inferring the IGM Neutral Fraction at z ~ 6-8 with Low-Luminosity Lyman Break Galaxies %U http://arxiv.org/abs/2111.14912 %X We present a Bayesian inference on the neutral hydrogen fraction of the intergalactic medium (IGM), $x_HI$, at $z \sim$ 6-8 using the properties of Lyman break galaxies during the Epoch of Reionization. We use large samples of LBG candidates at $5.5 z 8.2$ with spectroscopy from Keck/DEIMOS and Keck/MOSFIRE. For each galaxy, we incorporate either the Lyman-$\alpha$ equivalent width (EW) for detections or the EW limit spectrum for nondetections to parameterize the EW distribution at various ultraviolet brightnesses for a given redshift. Using our reference sample of galaxy candidates from the ionized universe at $z$ $\sim$ 6.0, we are able to infer $x_HI$ at two redshifts: $z$ $\sim$ 6.7 and $z$ $\sim$ 7.6. This work includes intrinsically faint, gravitationally lensed galaxies at $z$ $\sim$ 6.0 in order to constrain the intrinsic faint-end Ly$\alpha$ EW distribution and provide a comparable population of galaxies to counterparts in our sample that are at higher redshift. The inclusion of faint galaxy candidates, in addition to a more sophisticated modelling framework, allows us to better isolate effects of the interstellar medium and circumgalactic medium on the observed Lyman-$\alpha$ distribution from those of the IGM. We infer an upper limit of $x_HI$ $łeq$ 0.25 at $z$ = 6.7 $\pm$ 0.2 and a neutral fraction of $x_HI$ = $0.83^+0.08_-0.11$ at $z$ = 7.6$\pm$ 0.6, both within 1$\sigma$ uncertainty, results which favor a moderately late and rapid reionization.

@misc{bolan2021inferring, abstract = {We present a Bayesian inference on the neutral hydrogen fraction of the intergalactic medium (IGM), $x_{\textrm{HI}}$, at $z \sim$ 6-8 using the properties of Lyman break galaxies during the Epoch of Reionization. We use large samples of LBG candidates at $5.5 \leq z \leq 8.2$ with spectroscopy from Keck/DEIMOS and Keck/MOSFIRE. For each galaxy, we incorporate either the Lyman-$\alpha$ equivalent width (EW) for detections or the EW limit spectrum for nondetections to parameterize the EW distribution at various ultraviolet brightnesses for a given redshift. Using our reference sample of galaxy candidates from the ionized universe at $z$ $\sim$ 6.0, we are able to infer $x_{\textrm{HI}}$ at two redshifts: $z$ $\sim$ 6.7 and $z$ $\sim$ 7.6. This work includes intrinsically faint, gravitationally lensed galaxies at $z$ $\sim$ 6.0 in order to constrain the intrinsic faint-end Ly$\alpha$ EW distribution and provide a comparable population of galaxies to counterparts in our sample that are at higher redshift. The inclusion of faint galaxy candidates, in addition to a more sophisticated modelling framework, allows us to better isolate effects of the interstellar medium and circumgalactic medium on the observed Lyman-$\alpha$ distribution from those of the IGM. We infer an upper limit of $x_{\textrm{HI}}$ $\leq$ 0.25 at $z$ = 6.7 $\pm$ 0.2 and a neutral fraction of $x_{\textrm{HI}}$ = $0.83^{+0.08}_{-0.11}$ at $z$ = 7.6$\pm$ 0.6, both within 1$\sigma$ uncertainty, results which favor a moderately late and rapid reionization.}, added-at = {2021-12-01T06:52:57.000+0100}, author = {Bolan, Patricia and Lemaux, Brian C. and Mason, Charlotte and Bradač, Maruša and Treu, Tommaso and Strait, Victoria and Pelliccia, Debora and Pentericci, Laura and Malkan, Matthew}, biburl = {https://www.bibsonomy.org/bibtex/274eb73c100f3a1a947d9cebed56ad8f0/gpkulkarni}, description = {Inferring the IGM Neutral Fraction at z ~ 6-8 with Low-Luminosity Lyman Break Galaxies}, interhash = {b0aabaa354e735bfcfb74b34a40eac65}, intrahash = {74eb73c100f3a1a947d9cebed56ad8f0}, keywords = {library}, note = {cite arxiv:2111.14912Comment: 11 pages, 7 figures}, timestamp = {2021-12-01T06:52:57.000+0100}, title = {Inferring the IGM Neutral Fraction at z ~ 6-8 with Low-Luminosity Lyman Break Galaxies}, url = {http://arxiv.org/abs/2111.14912}, year = 2021 }