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DES J0454−4448 : discovery of the first luminous z ≥ 6 quasar from the Dark Energy Survey

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DES J0454−4448 : discovery of the first luminous z ≥ 6 quasar from the Dark Energy Survey

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Título DES J0454−4448 : discovery of the first luminous z ≥ 6 quasar from the Dark Energy Survey
Autor Reed, Sophie L.
McMahon, Richard G.
Banerji, M.
Becker, George D.
Gonzalez-Solares, Eduardo
Martini, Paul
Ostrovski, F.
Rauch, Michael
Abbott, Timothy M. C.
Abdalla, Filipe B.
Allam, Sahar S.
Benoit-Lévy, Aurélien
Bertin, Emmanuel
Buckley-Geer, Elizabeth
Burke, David Lyle
Costa, Luiz N. da
Carnero Rosell, Aurelio
D'Andrea, Christopher B.
DePoy, Darren L.
Desai, S.
Diehl, H. Thomas
Doel, Peter
Cunha, Carlos Eduardo
Estrada, Juan
Evrard, August E.
Fausti Neto, Angelo
Finley, David A.
Fosalba Vela, Pablo
Frieman, Joshua A.
Gruen, Daniel
Honscheid, K.
James, David J.
Kent, Stephen M.
Kuehn, Kyler
Kuropatkin, Nikolay P.
Lahav, Ofer
Maia, Marcio Antonio Geimba
Makler, Martín
Marshall, Jennifer L.
Merritt, K. Wyatt
Miquel, Ramon
Mohr, Joseph J.
Nord, Brian Dennis
Ogando, Ricardo L.C.
Plazas Malagón, Andrés Alejandro
Romer, Anita K.
Roodman, Aaron
Rykoff, Eli
Sako, Masao
Sanchez-Alvaro, Eusebio
Santiago, Basilio Xavier
Schubnell, Michael
Sevilla Noarbe, Ignacio
Smith, Robert Christopher
Soares-Santos, Marcelle
Suchyta, Eric
Swanson, Molly E. C.
Tarle, Gregory
Thomas, D.
Tucker, Douglas L.
Walker, Alistair
Wechsler, Risa H.
Abstract We 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.
Contido em Monthly notices of the Royal Astronomical Society. Oxford. Vol. 454, no. 4 (Dec. 2015), p. 3952-3961
Assunto Formacao de galaxias
Galáxias ativas
Quasars
[en] Dark ages, reionization, first stars
[en] Galaxies: active
[en] Galaxies: formation
[en] Galaxies: high-redshift
[en] Quasars: individual: DES J0454-4448
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/140396
Arquivos Descrição Formato
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