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dc.contributor.authorReed, Sophie L.pt_BR
dc.contributor.authorMcMahon, Richard G.pt_BR
dc.contributor.authorBanerji, M.pt_BR
dc.contributor.authorBecker, George D.pt_BR
dc.contributor.authorGonzalez-Solares, Eduardopt_BR
dc.contributor.authorMartini, Paulpt_BR
dc.contributor.authorOstrovski, F.pt_BR
dc.contributor.authorRauch, Michaelpt_BR
dc.contributor.authorAbbott, Timothy M. C.pt_BR
dc.contributor.authorAbdalla, Filipe B.pt_BR
dc.contributor.authorAllam, Sahar S.pt_BR
dc.contributor.authorBenoit-Lévy, Aurélienpt_BR
dc.contributor.authorBertin, Emmanuelpt_BR
dc.contributor.authorBuckley-Geer, Elizabethpt_BR
dc.contributor.authorBurke, David Lylept_BR
dc.contributor.authorCosta, Luiz N. dapt_BR
dc.contributor.authorCarnero Rosell, Aureliopt_BR
dc.contributor.authorD'Andrea, Christopher B.pt_BR
dc.contributor.authorDePoy, Darren L.pt_BR
dc.contributor.authorDesai, S.pt_BR
dc.contributor.authorDiehl, H. Thomaspt_BR
dc.contributor.authorDoel, Peterpt_BR
dc.contributor.authorCunha, Carlos Eduardopt_BR
dc.contributor.authorEstrada, Juanpt_BR
dc.contributor.authorEvrard, August E.pt_BR
dc.contributor.authorFausti Neto, Angelopt_BR
dc.contributor.authorFinley, David A.pt_BR
dc.contributor.authorFosalba Vela, Pablopt_BR
dc.contributor.authorFrieman, Joshua A.pt_BR
dc.contributor.authorGruen, Danielpt_BR
dc.contributor.authorHonscheid, K.pt_BR
dc.contributor.authorJames, David J.pt_BR
dc.contributor.authorKent, Stephen M.pt_BR
dc.contributor.authorKuehn, Kylerpt_BR
dc.contributor.authorKuropatkin, Nikolay P.pt_BR
dc.contributor.authorLahav, Oferpt_BR
dc.contributor.authorMaia, Marcio Antonio Geimbapt_BR
dc.contributor.authorMakler, Martínpt_BR
dc.contributor.authorMarshall, Jennifer L.pt_BR
dc.contributor.authorMerritt, K. Wyattpt_BR
dc.contributor.authorMiquel, Ramonpt_BR
dc.contributor.authorMohr, Joseph J.pt_BR
dc.contributor.authorNord, Brian Dennispt_BR
dc.contributor.authorOgando, Ricardo L.C.pt_BR
dc.contributor.authorPlazas Malagón, Andrés Alejandropt_BR
dc.contributor.authorRomer, Anita K.pt_BR
dc.contributor.authorRoodman, Aaronpt_BR
dc.contributor.authorRykoff, Elipt_BR
dc.contributor.authorSako, Masaopt_BR
dc.contributor.authorSanchez-Alvaro, Eusebiopt_BR
dc.contributor.authorSantiago, Basilio Xavierpt_BR
dc.contributor.authorSchubnell, Michaelpt_BR
dc.contributor.authorSevilla Noarbe, Ignaciopt_BR
dc.contributor.authorSmith, Robert Christopherpt_BR
dc.contributor.authorSoares-Santos, Marcellept_BR
dc.contributor.authorSuchyta, Ericpt_BR
dc.contributor.authorSwanson, Molly E. C.pt_BR
dc.contributor.authorTarle, Gregorypt_BR
dc.contributor.authorThomas, D.pt_BR
dc.contributor.authorTucker, Douglas L.pt_BR
dc.contributor.authorWalker, Alistairpt_BR
dc.contributor.authorWechsler, Risa H.pt_BR
dc.date.accessioned2016-05-06T02:22:12Zpt_BR
dc.date.issued2015pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/140396pt_BR
dc.description.abstractWe present the first results of a survey for high-redshift, z ≥ 6, quasars using izY multicolour photometric observations from the Dark Energy Survey (DES). Here we report the discovery and spectroscopic confirmation of the zAB, YAB = 20.2, 20.2 (M1450 = −26.5) quasar DES J0454−4448 with a redshift of z = 6.09±0.02 based on the onset of the Ly α forest and an H I near zone size of 4.1+1.1 −1.2 proper Mpc. The quasar was selected as an i-band drop out with i−z= 2.46 and zAB < 21.5 from an area of ∼300 deg2. It is the brightest of our 43 candidates and was identified for spectroscopic follow-up solely based on the DES i−z and z−Y colours. The quasar is detected by WISE and has W1AB = 19.68. The discovery of one spectroscopically confirmed quasar with 5.7 < z<6.5 and zAB ≤ 20.2 is consistent with recent determinations of the luminosity function at z ∼ 6. DES when completed will have imaged ∼5000 deg2 to YAB = 23.0 (5σ point source) and we expect to discover 50–100 new quasars with z > 6 including 3–10 with z > 7 dramatically increasing the numbers of quasars currently known that are suitable for detailed studies.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the Royal Astronomical Society. Oxford. Vol. 454, no. 4 (Dec. 2015), p. 3952-3961pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxies: activeen
dc.subjectGaláxias ativaspt_BR
dc.subjectGalaxies: formationen
dc.subjectFormacao de galaxiaspt_BR
dc.subjectQuasarspt_BR
dc.subjectGalaxies: high-redshiften
dc.subjectQuasars: individual: DES J0454-4448en
dc.subjectDark ages, reionization, first starsen
dc.titleDES J0454−4448 : discovery of the first luminous z ≥ 6 quasar from the Dark Energy Surveypt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000985568pt_BR
dc.type.originEstrangeiropt_BR


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