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Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2015

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

S. L. Reed
  • Function : Author
R. G. Mcmahon
  • Function : Author
M. Banerji
  • Function : Author
G. D. Becker
  • Function : Author
E. Gonzalez-Solares
  • Function : Author
P. Martini
  • Function : Author
F. Ostrovski
  • Function : Author
M. Rauch
  • Function : Author
T. Abbott
  • Function : Author
F. B. Abdalla
  • Function : Author
S. Allam
  • Function : Author
A. Benoit-Levy
  • Function : Author
E. Buckley-Geer
  • Function : Author
D. Burke
  • Function : Author
A. Carnero Rosell
  • Function : Author
L. N. da Costa
  • Function : Author
C. d'Andrea
  • Function : Author
D. L. Depoy
  • Function : Author
S. Desai
  • Function : Author
H. T. Diehl
  • Function : Author
P. Doel
  • Function : Author
C. E. Cunha
  • Function : Author
J. Estrada
  • Function : Author
A. E. Evrard
  • Function : Author
A. Fausti Neto
  • Function : Author
D. A. Finley
  • Function : Author
P. Fosalba
J. Frieman
  • Function : Author
D. Gruen
  • Function : Author
K. Honscheid
  • Function : Author
D. James
  • Function : Author
S. Kent
  • Function : Author
K. Kuehn
  • Function : Author
N. Kuropatkin
  • Function : Author
O. Lahav
  • Function : Author
M. A. G. Maia
  • Function : Author
M. Makler
  • Function : Author
J. Marshall
  • Function : Author
K. Merritt
  • Function : Author
R. Miquel
  • Function : Author
J. Mohr
  • Function : Author
B. Nord
  • Function : Author
R. Ogando
  • Function : Author
A. Plazas
  • Function : Author
K. Romer
  • Function : Author
A. Roodman
  • Function : Author
E. Rykoff
  • Function : Author
M. Sako
  • Function : Author
E. Sanchez
  • Function : Author
B. Santiago
  • Function : Author
M. Schubnell
  • Function : Author
I. Sevilla
  • Function : Author
C. Smith
M. Soares-Santos
  • Function : Author
E. Suchyta
  • Function : Author
M. E. C. Swanson
  • Function : Author
G. Tarle
  • Function : Author
D. Thomas
  • Function : Author
D. Tucker
  • Function : Author
A. Walker
  • Function : Author
R. H. Wechsler
  • Function : Author

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_{-1.2}^{+1.1} 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.
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Dates and versions

insu-03644668 , version 1 (25-04-2022)

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S. L. Reed, R. G. Mcmahon, M. Banerji, G. D. Becker, E. Gonzalez-Solares, et al.. DES J0454-4448: discovery of the first luminous z ≥ 6 quasar from the Dark Energy Survey. Monthly Notices of the Royal Astronomical Society, 2015, 454, pp.3952-3961. ⟨10.1093/mnras/stv2031⟩. ⟨insu-03644668⟩
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