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dc.contributor.authorFarina, Emanuele Paolo
dc.contributor.authorArrigoni-Battaia, Fabrizio
dc.contributor.authorCosta, Tiago
dc.contributor.authorWalter, Fabian
dc.contributor.authorHennawi, Joseph F.
dc.contributor.authorDrake, Alyssa B.
dc.contributor.authorDecarli, Roberto
dc.contributor.authorGutcke, Thales A.
dc.contributor.authorMazzucchelli, Chiara
dc.contributor.authorNeeleman, Marcel
dc.contributor.authorGeorgiev, Iskren
dc.contributor.authorEilers, Anna-Christina
dc.contributor.authorDavies, Frederick B.
dc.contributor.authorBañados, Eduardo
dc.contributor.authorFan, Xiaohui
dc.contributor.authorOnoue, Masafusa
dc.contributor.authorSchindler, Jan-Torge
dc.contributor.authorVenemans, Bram P.
dc.contributor.authorWang, Feige
dc.contributor.authorYang, Jinyi
dc.contributor.authorRabien, Sebastian
dc.contributor.authorBusoni, Lorenzo
dc.date.accessioned2020-02-04T19:17:50Z
dc.date.available2020-02-04T19:17:50Z
dc.date.issued2019-12-19
dc.identifier.citationEmanuele Paolo Farina et al 2019 ApJ 887 196en_US
dc.identifier.issn0004-637X
dc.identifier.doi10.3847/1538-4357/ab5847
dc.identifier.urihttp://hdl.handle.net/10150/636904
dc.description.abstractThe discovery of quasars a few hundred megayears after the Big Bang represents a major challenge to our understanding of black holes as well as galaxy formation and evolution. Quasars' luminosity is produced by extreme gas accretion onto black holes, which have already reached masses of M-BH > 10(9) M-circle dot by z similar to 6. Simultaneously, their host galaxies form hundreds of stars per year, using up gas in the process. To understand which environments are able to sustain the rapid formation of these extreme sources, we started a Very Large Telescope/Multi-Unit Spectroscopic Explorer (MUSE) effort aimed at characterizing the surroundings of a sample of 5.7 < z < 6.6 quasars, which we have dubbed the Reionization Epoch QUasar InvEstigation with MUSE (REQUIEM) survey. We here present results of our searches for extended Ly alpha halos around the first 31 targets observed as part of this program. Reaching 5 sigma surface brightness limits of 0.1-1.1 x 10(-17) erg s(-1) cm(-2) arcsec(-2) over a 1 arcsec(2) aperture, we were able to unveil the presence of 12 Ly alpha nebulae, eight of which are newly discovered. The detected nebulae show a variety of emission properties and morphologies with luminosities ranging from 8 x 10(42) to 2 x 10(44) erg s(-1), FWHMs between 300 and 1700 km s(-1), sizes <30 pkpc, and redshifts consistent with those of the quasar host galaxies. As the first statistical and homogeneous investigation of the circumgalactic medium of massive galaxies at the end of the reionization epoch, the REQUIEM survey enables the study of the evolution of the cool gas surrounding quasars in the first 3 Gyr of the universe. A comparison with the extended Ly alpha emission observed around bright (M-1450 less than or similar to -25 mag) quasars at intermediate redshift indicates little variations on the properties of the cool gas from z similar to 6 to z similar to 3, followed by a decline in the average surface brightness down to z similar to 2.en_US
dc.language.isoenen_US
dc.publisherIOP PUBLISHING LTDen_US
dc.rightsCopyright © 2019. The American Astronomical Society. All rights reserved.en_US
dc.rights.urihttp://iopscience.iop.org/info/page/text-and-data-mining
dc.titleThe REQUIEM Survey. I. A Search for Extended Lyα Nebular Emission Around 31 z > 5.7 Quasarsen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.identifier.journalASTROPHYSICAL JOURNALen_US
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_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleThe Astrophysical Journal
dc.source.volume887
dc.source.issue2
dc.source.beginpage196
refterms.dateFOA2020-02-04T19:17:52Z


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