%0 Generic %1 cai2016mapping %A Cai, Zheng %A Fan, Xiaohui %A Bian, Fuyan %A Zabludoff, Ann %A Yang, Yujin %A Prochaska, J. Xavier %A McGreer, Ian %A Zheng, Zhen-Ya %A Kashikawa, Nobunari %A Wang, Ran %A Frye, Brenda %A Green, Richard %A Jiang, Linhua %D 2016 %K cluster igm lya overdensity qsos %T MApping the Most Massive Overdensities (MAMMOTH) II -- Discovery of an Extremely Massive Overdensity BOSS1441 at $z=2.32$ %U http://arxiv.org/abs/1609.02913 %X Cosmological simulations suggest a strong correlation between high optical-depth Ly$\alpha$ absorbers, which arise from the intergalactic medium (IGM), and 3-D mass overdensities on scales of $10-30$ $h^-1$ comoving Mpc. By examining the absorption spectra of $\sim$ 80,000 QSO sight-lines over a volume of 0.1 Gpc$^3$ in the Sloan Digital Sky Survey III (SDSS-III), we have identified an extreme overdensity, BOSS1441, which contains a rare group of strong Ly$\alpha$ absorbers at $z=2.320.02$. This absorber group is associated with six QSOs at the same redshift on a 30 comoving Mpc scale. Using Mayall/MOSAIC narrowband and broadband imaging, we detect Ly$\alpha$ emitters (LAEs) down to $0.7L_Ly\alpha^*$, and reveal a large-scale structure of Ly$\alpha$ emitters (LAEs) in this field. Our follow-up Large Binocular Telescope (LBT) observations have spectroscopically confirmed 19 galaxies in the density peak. We show that BOSS1441 has an LAE overdensity of $10.82.6$ on a 15 comoving Mpc scale which could collapse to a massive cluster with $M\gtrsim10^15$ M$_ødot$ at $z\sim0$. This overdensity is among the most massive large-scale structures at $z\sim2$ discovered to date.

@misc{cai2016mapping, abstract = {Cosmological simulations suggest a strong correlation between high optical-depth Ly$\alpha$ absorbers, which arise from the intergalactic medium (IGM), and 3-D mass overdensities on scales of $10-30$ $h^{-1}$ comoving Mpc. By examining the absorption spectra of $\sim$ 80,000 QSO sight-lines over a volume of 0.1 Gpc$^3$ in the Sloan Digital Sky Survey III (SDSS-III), we have identified an extreme overdensity, BOSS1441, which contains a rare group of strong Ly$\alpha$ absorbers at $z=2.32\pm 0.02$. This absorber group is associated with six QSOs at the same redshift on a 30 comoving Mpc scale. Using Mayall/MOSAIC narrowband and broadband imaging, we detect Ly$\alpha$ emitters (LAEs) down to $0.7\times L_{\rm{Ly\alpha}}^*$, and reveal a large-scale structure of Ly$\alpha$ emitters (LAEs) in this field. Our follow-up Large Binocular Telescope (LBT) observations have spectroscopically confirmed 19 galaxies in the density peak. We show that BOSS1441 has an LAE overdensity of $10.8\pm 2.6$ on a 15 comoving Mpc scale which could collapse to a massive cluster with $M\gtrsim10^{15}$ M$_\odot$ at $z\sim0$. This overdensity is among the most massive large-scale structures at $z\sim2$ discovered to date.}, added-at = {2016-09-13T10:36:15.000+0200}, author = {Cai, Zheng and Fan, Xiaohui and Bian, Fuyan and Zabludoff, Ann and Yang, Yujin and Prochaska, J. Xavier and McGreer, Ian and Zheng, Zhen-Ya and Kashikawa, Nobunari and Wang, Ran and Frye, Brenda and Green, Richard and Jiang, Linhua}, biburl = {https://www.bibsonomy.org/bibtex/2dc6428a709a734da36ec6f6e04fd6507/miki}, description = {[1609.02913] MApping the Most Massive Overdensities (MAMMOTH) II -- Discovery of an Extremely Massive Overdensity BOSS1441 at $z=2.32$}, interhash = {c0c41cf76465ed56773880ddd64bddd9}, intrahash = {dc6428a709a734da36ec6f6e04fd6507}, keywords = {cluster igm lya overdensity qsos}, note = {cite arxiv:1609.02913Comment: 12 pages, 8 figures. submitted to ApJ, Comments are welcome}, timestamp = {2016-09-13T10:36:15.000+0200}, title = {MApping the Most Massive Overdensities (MAMMOTH) II -- Discovery of an Extremely Massive Overdensity BOSS1441 at $z=2.32$}, url = {http://arxiv.org/abs/1609.02913}, year = 2016 }