%0 Generic %1 inoue2017silverrush %A Inoue, Akio K. %A Hasegawa, Kenji %A Ishiyama, Tomoaki %A Yajima, Hidenobu %A Shimizu, Ikkoh %A Umemura, Masayuki %A Konno, Akira %A Harikane, Yuichi %A Shibuya, Takatoshi %A Ouchi, Masami %A Shimasaku, Kazuhiro %A Ono, Yoshiaki %A Kusakabe, Haruka %A Higuchi, Ryo %A Lee, Chien-Hsiu %D 2017 %K Lya emitters high-z simulations %T SILVERRUSH. VI. A simulation of Ly$\alpha$ emitters in the reionization epoch and a comparison with Subaru Hyper Suprime-Cam survey early data %U http://arxiv.org/abs/1801.00067 %X The survey of Lyman $\alpha$ emitters (LAEs) with Subaru Hyper Suprime-Cam, called SILVERRUSH (Ouchi et al.), is producing massive data of LAEs at $z\gtrsim6$. Here we present LAE simulations to compare the SILVERRUSH data. In 162$^3$ comoving Mpc$^3$ boxes, where numerical radiative transfer calculations of reionization were performed, LAEs have been modeled with physically motivated analytic recipes as a function of halo mass. We have examined $2^3$ models depending on the presence or absence of dispersion of halo Ly$\alpha$ emissivity, dispersion of the halo Ly$\alpha$ optical depth, $\tau_\alpha$, and halo mass dependence of $\tau_\alpha$. The unique free parameter in our model, a pivot value of $\tau_\alpha$, is calibrated so as to reproduce the $z=5.7$ Ly$\alpha$ luminosity function (LF). We compare our model predictions with Ly$\alpha$ LFs at $z=6.6$ and $7.3$, LAE angular auto-correlation functions (ACFs) at $z=5.7$ and $6.6$, and LAE fractions in Lyman break galaxies at $5<z<7$. The Ly$\alpha$ LFs and ACFs are reproduced by multiple models, but the LAE fraction turns out to be the most critical test. The dispersion of $\tau_\alpha$ and the halo mass dependence of $\tau_\alpha$ are essential to explain all observations reasonably. Therefore, a simple model of one-to-one correspondence between halo mass and Ly$\alpha$ luminosity with a constant Ly$\alpha$ escape fraction has been ruled out. Based on our best model, we present a formula to estimate the intergalactic neutral hydrogen fraction, $x_HI$, from the observed Ly$\alpha$ luminosity density at $z\gtrsim6$. We finally obtain $x_HI=0.5_-0.3^+0.1$ as a volume-average at $z=7.3$.

@misc{inoue2017silverrush, abstract = {The survey of Lyman $\alpha$ emitters (LAEs) with Subaru Hyper Suprime-Cam, called SILVERRUSH (Ouchi et al.), is producing massive data of LAEs at $z\gtrsim6$. Here we present LAE simulations to compare the SILVERRUSH data. In 162$^3$ comoving Mpc$^3$ boxes, where numerical radiative transfer calculations of reionization were performed, LAEs have been modeled with physically motivated analytic recipes as a function of halo mass. We have examined $2^3$ models depending on the presence or absence of dispersion of halo Ly$\alpha$ emissivity, dispersion of the halo Ly$\alpha$ optical depth, $\tau_\alpha$, and halo mass dependence of $\tau_\alpha$. The unique free parameter in our model, a pivot value of $\tau_\alpha$, is calibrated so as to reproduce the $z=5.7$ Ly$\alpha$ luminosity function (LF). We compare our model predictions with Ly$\alpha$ LFs at $z=6.6$ and $7.3$, LAE angular auto-correlation functions (ACFs) at $z=5.7$ and $6.6$, and LAE fractions in Lyman break galaxies at $5<z<7$. The Ly$\alpha$ LFs and ACFs are reproduced by multiple models, but the LAE fraction turns out to be the most critical test. The dispersion of $\tau_\alpha$ and the halo mass dependence of $\tau_\alpha$ are essential to explain all observations reasonably. Therefore, a simple model of one-to-one correspondence between halo mass and Ly$\alpha$ luminosity with a constant Ly$\alpha$ escape fraction has been ruled out. Based on our best model, we present a formula to estimate the intergalactic neutral hydrogen fraction, $x_{\rm HI}$, from the observed Ly$\alpha$ luminosity density at $z\gtrsim6$. We finally obtain $x_{\rm HI}=0.5_{-0.3}^{+0.1}$ as a volume-average at $z=7.3$.}, added-at = {2018-01-03T10:52:13.000+0100}, author = {Inoue, Akio K. and Hasegawa, Kenji and Ishiyama, Tomoaki and Yajima, Hidenobu and Shimizu, Ikkoh and Umemura, Masayuki and Konno, Akira and Harikane, Yuichi and Shibuya, Takatoshi and Ouchi, Masami and Shimasaku, Kazuhiro and Ono, Yoshiaki and Kusakabe, Haruka and Higuchi, Ryo and Lee, Chien-Hsiu}, biburl = {https://www.bibsonomy.org/bibtex/2407f754fdab2ffae1b29fda6e5aecc48/miki}, description = {[1801.00067] SILVERRUSH. VI. A simulation of Ly$\alpha$ emitters in the reionization epoch and a comparison with Subaru Hyper Suprime-Cam survey early data}, interhash = {6f65a4b4ab47aea8abe575cff020be0b}, intrahash = {407f754fdab2ffae1b29fda6e5aecc48}, keywords = {Lya emitters high-z simulations}, note = {cite arxiv:1801.00067Comment: Submitted to PASJ, 29 pages, 20 figures}, timestamp = {2018-01-03T10:52:13.000+0100}, title = {SILVERRUSH. VI. A simulation of Ly$\alpha$ emitters in the reionization epoch and a comparison with Subaru Hyper Suprime-Cam survey early data}, url = {http://arxiv.org/abs/1801.00067}, year = 2017 }