%0 Generic %1 yajima2017modeling %A Yajima, Hidenobu %A Sugimura, Kazuyuki %A Hasegawa, Kenji %D 2017 %K LAE high-redshift %T Modeling of Lyman-alpha Emitting Galaxies and Ionized Bubbles at the Era of Reionization %U http://arxiv.org/abs/1701.05571 %X Understanding Ly$\alpha$ emitting galaxies (LAEs) can be a key to reveal cosmic reionization and galaxy formation in the early Universe. Based on halo merger trees and Ly$\alpha$ radiation transfer calculations, we model redshift evolution of LAEs and their observational properties at $z 6$. We consider ionized bubbles associated with individual LAEs and IGM transmission of Ly$\alpha$ photons. We find that Ly$\alpha$ luminosity tightly correlates with halo mass and stellar mass, while the relation with star formation rate has a large dispersion. Comparing our models with the observed luminosity function by Konno et al. (2014), we suggest that LAEs at $z 7$ have galactic wind of $V_out 150~km\, s^-1$ and HI column density of $N_HI 10^20~cm^-2$. Number density of bright LAEs rapidly decreases as redshift increases, due to both lower star formation rate and smaller HII bubbles. Our model predicts future wide deep surveys with next generation telescopes, such as JWST, E-ELT and TMT, can detect LAEs at $z 10$ with a number density of $n_LAE \sim$ a few $\times10^-6 ~Mpc^-3$ for the flux sensitivity of $10^-18 ~erg\, cm^-2\, s^-1$. By combining these surveys with future 21-cm observations, it could be possible to detect both LAEs with $L_Ly\alpha > 10^42~erg~s^-1$ and their associated giant HII bubbles with the size > 250 kpc at $z 10$.

@misc{yajima2017modeling, abstract = {Understanding Ly$\alpha$ emitting galaxies (LAEs) can be a key to reveal cosmic reionization and galaxy formation in the early Universe. Based on halo merger trees and Ly$\alpha$ radiation transfer calculations, we model redshift evolution of LAEs and their observational properties at $z \ge 6$. We consider ionized bubbles associated with individual LAEs and IGM transmission of Ly$\alpha$ photons. We find that Ly$\alpha$ luminosity tightly correlates with halo mass and stellar mass, while the relation with star formation rate has a large dispersion. Comparing our models with the observed luminosity function by Konno et al. (2014), we suggest that LAEs at $z \sim 7$ have galactic wind of $V_{\rm out} \gtrsim 150~\rm km\, s^{-1}$ and HI column density of $N_{\rm HI} \gtrsim 10^{20}~\rm cm^{-2}$. Number density of bright LAEs rapidly decreases as redshift increases, due to both lower star formation rate and smaller HII bubbles. Our model predicts future wide deep surveys with next generation telescopes, such as JWST, E-ELT and TMT, can detect LAEs at $z \sim 10$ with a number density of $n_{\rm LAE} \sim$ a few $\times10^{-6} ~\rm Mpc^{-3}$ for the flux sensitivity of $10^{-18} ~\rm erg\, cm^{-2}\, s^{-1}$. By combining these surveys with future 21-cm observations, it could be possible to detect both LAEs with $L_{\rm Ly\alpha} > 10^{42}~\rm erg~s^{-1}$ and their associated giant HII bubbles with the size > 250 kpc at $z \sim 10$.}, added-at = {2017-01-23T10:09:39.000+0100}, author = {Yajima, Hidenobu and Sugimura, Kazuyuki and Hasegawa, Kenji}, biburl = {https://www.bibsonomy.org/bibtex/23450816915644cb114cc67ccb5e867fb/miki}, description = {[1701.05571] Modeling of Lyman-alpha Emitting Galaxies and Ionized Bubbles at the Era of Reionization}, interhash = {93d1b5522a12e82bf6275defeb895e19}, intrahash = {3450816915644cb114cc67ccb5e867fb}, keywords = {LAE high-redshift}, note = {cite arxiv:1701.05571Comment: 11 pages, 11 figures, submitted to ApJ}, timestamp = {2017-01-23T10:09:39.000+0100}, title = {Modeling of Lyman-alpha Emitting Galaxies and Ionized Bubbles at the Era of Reionization}, url = {http://arxiv.org/abs/1701.05571}, year = 2017 }