Show simple item record

dc.contributor.authorFarina, Emanuele Paolo
dc.contributor.authorSchindler, Jan-Torge
dc.contributor.authorWalter, Fabian
dc.contributor.authorBañados, Eduardo
dc.contributor.authorDavies, Frederick B.
dc.contributor.authorDecarli, Roberto
dc.contributor.authorEilers, Anna-Christina
dc.contributor.authorFan, Xiaohui
dc.contributor.authorHennawi, Joseph F.
dc.contributor.authorMazzucchelli, Chiara
dc.contributor.authorMeyer, Romain A.
dc.contributor.authorTrakhtenbrot, Benny
dc.contributor.authorVolonteri, Marta
dc.contributor.authorWang, Feige
dc.contributor.authorWorseck, Gábor
dc.contributor.authorYang, Jinyi
dc.contributor.authorGutcke, Thales A.
dc.contributor.authorVenemans, Bram P.
dc.contributor.authorBosman, Sarah E. I.
dc.contributor.authorCosta, Tiago
dc.contributor.authorRosa, Gisella De
dc.contributor.authorDrake, Alyssa B.
dc.contributor.authorOnoue, Masafusa
dc.date.accessioned2022-12-20T16:45:03Z
dc.date.available2022-12-20T16:45:03Z
dc.date.issued2022-12-20
dc.identifier.citationFarina , E P , Schindler , J-T , Walter , F , Bañados , E , Davies , F B , Decarli , R , Eilers , A-C , Fan , X , Hennawi , J F , Mazzucchelli , C , Meyer , R A , Trakhtenbrot , B , Volonteri , M , Wang , F , Worseck , G , Yang , J , Gutcke , T A , Venemans , B P , Bosman , S E I , Costa , T , Rosa , G D , Drake , A B & Onoue , M 2022 , ' The X–shooter/ALMA Sample of Quasars in the Epoch of Reionization. II. Black Hole Masses, Eddington Ratios, and the Formation of the First Quasars ' , The Astrophysical Journal , vol. 941 , no. 2 , 106 , pp. 1-27 . https://doi.org/10.3847/1538-4357/ac9626
dc.identifier.issn0004-637X
dc.identifier.otherJisc: 789763
dc.identifier.otherpublisher-id: apjac9626
dc.identifier.othermanuscript: ac9626
dc.identifier.otherother: aas40001
dc.identifier.otherORCID: /0000-0002-0174-3362/work/131544920
dc.identifier.urihttp://hdl.handle.net/2299/25959
dc.description© 2022. The Author(s). Published by the American Astronomical Society. This is an open access article distributed under the Creative Commons Attribution License, to view a copy of the license, see: https://creativecommons.org/licenses/by/4.0/
dc.description.abstractWe present measurements of black hole masses and Eddington ratios (λ Edd) for a sample of 38 bright (M 1450 < −24.4 mag) quasars at 5.8 ≲ z ≲ 7.5, derived from Very Large Telescope/X-shooter near-IR spectroscopy of their broad C iv and Mg ii emission lines. The black hole masses (on average, M BH ∼ 4.6 × 10 9 M ⊙) and accretion rates (0.1 ≲ λ Edd ≲ 1.0) are broadly consistent with that of similarly luminous 0.3 ≲ z ≲ 2.3 quasars, but there is evidence for a mild increase in the Eddington ratio above z ≳ 6. Combined with deep Atacama Large Millimeter/submillimeter Array (ALMA) observations of the [C II] 158 μm line from the host galaxies and VLT/MUSE investigations of the extended Lyα halos, this study provides fundamental clues to models of the formation and growth of the first massive galaxies and black holes. Compared to local scaling relations, z ≳ 5.7 black holes appear to be over-massive relative to their hosts, with accretion properties that do not change with host galaxy morphologies. Assuming that the kinematics of the T ∼ 10 4 K gas, traced by the extended Lyα halos, are dominated by the gravitational potential of the dark matter halo, we observe a similar relation between black hole mass and circular velocity as reported for z ∼ 0 galaxies. These results paint a picture where the first supermassive black holes reside in massive halos at z ≳ 6 and lead the first stages of galaxy formation by rapidly growing in mass with a duty cycle of order unity. The duty cycle needs to drastically drop toward lower redshifts, while the host galaxies continue forming stars at a rate of hundreds of solar masses per year, sustained by the large reservoirs of cool gas surrounding them.en
dc.format.extent27
dc.format.extent19883966
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.subject310
dc.subjectGalaxies and Cosmology
dc.subjectAstronomy and Astrophysics
dc.subjectSpace and Planetary Science
dc.titleThe X–shooter/ALMA Sample of Quasars in the Epoch of Reionization. II. Black Hole Masses, Eddington Ratios, and the Formation of the First Quasarsen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85144388735&partnerID=8YFLogxK
rioxxterms.versionofrecord10.3847/1538-4357/ac9626
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record