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dc.contributor.authorCai, Zheng
dc.contributor.authorFan, Xiaohui
dc.contributor.authorBian, Fuyan
dc.contributor.authorZabludoff, Ann
dc.contributor.authorYang, Yujin
dc.contributor.authorProchaska, J. Xavier
dc.contributor.authorMcGreer, Ian D.
dc.contributor.authorZheng, Zhen-Ya
dc.contributor.authorKashikawa, Nobunari
dc.contributor.authorWang, Ran
dc.contributor.authorFrye, Brenda
dc.contributor.authorGreen, Richard
dc.contributor.authorJiang, Linhua
dc.date.accessioned2017-07-17T16:27:37Z
dc.date.available2017-07-17T16:27:37Z
dc.date.issued2017-04-25
dc.identifier.citationMapping the Most Massive Overdensities through Hydrogen (MAMMOTH). II. Discovery of the Extremely Massive Overdensity BOSS1441 at z = 2.32 2017, 839 (2):131 The Astrophysical Journalen
dc.identifier.issn1538-4357
dc.identifier.doi10.3847/1538-4357/aa6a1a
dc.identifier.urihttp://hdl.handle.net/10150/624724
dc.description.abstractCosmological 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.
dc.description.sponsorshipUS NSF grant [AST 11-07682]; NSF [AST-1412981, AST-0908280]; NASA [ADP-NNX10AD47G]; JSPS [15H03645]en
dc.language.isoenen
dc.publisherIOP PUBLISHING LTDen
dc.relation.urlhttp://stacks.iop.org/0004-637X/839/i=2/a=131?key=crossref.1e8fe7e94498ee79b854943a1e5e0b7een
dc.rights© 2017. The American Astronomical Society. All rights reserved.en
dc.subjectgalaxies: clusters: generalen
dc.subjectgalaxies: high-redshiften
dc.subjectintergalactic mediumen
dc.titleMapping the Most Massive Overdensities through Hydrogen (MAMMOTH). II. Discovery of the Extremely Massive Overdensity BOSS1441 at z = 2.32en
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Steward Observen
dc.identifier.journalThe Astrophysical Journalen
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
refterms.dateFOA2018-08-14T13:54:33Z
html.description.abstractCosmological 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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