Browsing by Author "Fan, Xiaohui"

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    A giant protocluster of galaxies at redshift 5.7
    (2018) Jiang, , Linhua; Wu, Jin; Bian, Fuyan; Chiang, Yi-Kuan; Ho, Luis C.; Shen, Yue; Zheng, Zhen Ya; Bailey, John I.; Blanc, Guillermo; Crane, Jeffrey D.; Fan, Xiaohui; Mateo, Mario; Olszewski, Edward W.; Oyarzún, Grecco A.; Wang, Ran; Wu, Xue Bing
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    Mapping the Most Massive Overdensities through Hydrogen (MAMMOTH). II. Discovery of the Extremely Massive Overdensity BOSS1441 at z=2.32
    (IOP PUBLISHING LTD, 2017) Cai, Zheng; Fan, Xiaohui; Bian, Fuyan; Zabludoff, Ann; Yang, Yujin; Prochaska, J. Xavier; McGreer, Ian; Zheng, Zhen Ya; Kashikawa, Nobunari; Wang, Ran; Frye, Brenda; Green, Richard; Jiang, Linhua
    Cosmological simulations suggest a strong correlation between high optical-depth Lya absorbers, which arise from the intergalactic medium, and 3D mass overdensities on scales of 10-30 h(-1) comoving Mpc. By examining the absorption spectra of similar to 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 Lya absorbers at z = 2.32 +/- 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 Lya emitters (LAEs) down to 0.7 x L-Ly alpha ' * a and reveal a large-scale structure of LAEs in this field. Our follow-up LBT observations have spectroscopically confirmed 20 galaxies in the density peak. We show that BOSS1441 has an LAE overdensity of 10.8 +/- 2.6 on a 15 comoving Mpc scale, which could collapse to a massive cluster with M greater than or similar to 10(15) M-circle dot at z similar to 0. This overdensity is among the most massive large-scale structures at z similar to 2 discovered to date.
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    SpIES : THE SPITZER IRAC EQUATORIAL SURVEY
    (2016) Timlin, John D.; Ross, Nicholas P.; Richards, Gordon T.; Lacy, Mark; Ryan, Erin L.; Stone, Robert B.; Bauer, Franz Erik; Brandt, E. N.; Fan, Xiaohui; Glikman, Eilat