%0 Generic %1 bruton2023universe %A Bruton, Sean %A Lin, Yu-Heng %A Scarlata, Claudia %A Hayes, Matthew J. %D 2023 %K tifr %T The Universe is at Most 88% Neutral at z=10.6 %U http://arxiv.org/abs/2303.03419 %X Recent observations of GN-z11 with JWST have revealed a Ly$\alpha$ emission line with an equivalent width of 18$2$ angstroms. At z=10.6, this galaxy is expected to lie in the heart of reionization. We use a series of inhomogeneous reionization simulations to derive the distribution of the Ly$\alpha$ EW after traveling through the neutral intergalactic medium with varying average neutral gas fraction, $x_HI$. We use these distribution to place an upper limit of $x_HI < $ 0.88 at z=10.6 at 95% confidence level. We compare our upper limit to different reionization history models, which include the recently identified enhancement at the bright end of the luminosity function at z>8. We find that models in which faint galaxies have higher escape fraction compared to bright galaxies are favored by the new data.

@misc{bruton2023universe, abstract = {Recent observations of GN-z11 with JWST have revealed a Ly$\alpha$ emission line with an equivalent width of 18$\pm 2$ angstroms. At z=10.6, this galaxy is expected to lie in the heart of reionization. We use a series of inhomogeneous reionization simulations to derive the distribution of the Ly$\alpha$ EW after traveling through the neutral intergalactic medium with varying average neutral gas fraction, $x_{HI}$. We use these distribution to place an upper limit of $x_{HI} < $ 0.88 at z=10.6 at 95% confidence level. We compare our upper limit to different reionization history models, which include the recently identified enhancement at the bright end of the luminosity function at z>8. We find that models in which faint galaxies have higher escape fraction compared to bright galaxies are favored by the new data.}, added-at = {2023-03-08T05:17:59.000+0100}, author = {Bruton, Sean and Lin, Yu-Heng and Scarlata, Claudia and Hayes, Matthew J.}, biburl = {https://www.bibsonomy.org/bibtex/29ceecc5250e421f33745be4ec27650ab/citekhatri}, interhash = {e68c5702a204fdca33028cc1a16ceb32}, intrahash = {9ceecc5250e421f33745be4ec27650ab}, keywords = {tifr}, note = {cite arxiv:2303.03419Comment: 7 pages, 3 figures}, timestamp = {2023-03-08T05:17:59.000+0100}, title = {The Universe is at Most 88% Neutral at z=10.6}, url = {http://arxiv.org/abs/2303.03419}, year = 2023 }