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dc.contributor.authorMazzucchelli, C.
dc.contributor.authorDecarli, R.
dc.contributor.authorFarina, E. P.
dc.contributor.authorBañados, E.
dc.contributor.authorVenemans, B. P.
dc.contributor.authorStrauss, M. A.
dc.contributor.authorWalter, F.
dc.contributor.authorNeeleman, M.
dc.contributor.authorBertoldi, F.
dc.contributor.authorFan, X.
dc.contributor.authorRiechers, D.
dc.contributor.authorRix, H.-W.
dc.contributor.authorWang, R.
dc.date.accessioned2019-09-25T23:40:13Z
dc.date.available2019-09-25T23:40:13Z
dc.date.issued2019-08-23
dc.identifier.citationC. Mazzucchelli et al 2019 ApJ 881 163en_US
dc.identifier.issn0004-637X
dc.identifier.doi10.3847/1538-4357/ab2f75
dc.identifier.urihttp://hdl.handle.net/10150/634580
dc.description.abstractMassive, quiescent galaxies are already observed at redshift z similar to 4, i.e., similar to 1.5 Gyr after the big bang. Current models predict them to be formed via massive, gas-rich mergers at z > 6. Recent ALMA observations of the cool gas and dust in z greater than or similar to 6 quasars have discovered [C II]- and far-infrared-bright galaxies adjacent to several quasars. In this work, we present sensitive imaging and spectroscopic follow-up observations, with HST/WFC3, Spitzer/IRAC, VLT/MUSE, Magellan/FIRE, and LBT/LUCI-MODS, of ALMA-detected, dust-rich companion galaxies of four quasars at z greater than or similar to 6, specifically acquired to probe their stellar content and unobscured star formation rate. Three companion galaxies do not show significant emission in the observed optical/IR wavelength range. The photometric limits suggest that these galaxies are highly dust-enshrouded, with unobscured star formation rates SFRUV < few M-circle dot yr(-1), and a stellar content of M-* < 10(10) M(circle dot)yr(-1). However, the companion to PJ167-13 shows bright rest-frame UV emission (F140W AB = 25.48). Its spectral energy distribution resembles that of a star-forming galaxy with a total SFR similar to 50 M-circle dot yr(-1) and M-* similar to 9 x 10(9) M-circle dot. All the companion sources are consistent with residing on the galaxy main sequence at z similar to 6. Additional, deeper data from future facilities, such as the James Webb Space Telescope, are needed in order to characterize these gas-rich sources in the first gigayear of cosmic history.en_US
dc.description.sponsorshipERC; National Science Foundation [AST-1614213]; ESO Telescopes at the La Silla Paranal Observatory [099.A-0682, 297.A-5054]; NSF [AST-9987045]; NSF Telescope System Instrumentation Program (TSIP); Ohio Board of Regents; Ohio State University Office of Research; NASA [NAS 5-26555, 14876]; NASA from the Space Telescope Science Institute [10747]en_US
dc.language.isoenen_US
dc.publisherIOP PUBLISHING LTDen_US
dc.rightsCopyright © 2019. The American Astronomical Society.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectcosmology: observationsen_US
dc.subjectearly universeen_US
dc.subjectgalaxies: high-redshiften_US
dc.subjectquasars: generalen_US
dc.titleSpectral Energy Distributions of Companion Galaxies to z ∼ 6 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.volume881
dc.source.issue2
dc.source.beginpage163
refterms.dateFOA2019-09-25T23:40:13Z


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