We present the first results of a survey for high redshift, z $\ge$ 6,
quasars using izY multi-colour photometric observations from the Dark Energy
Survey (DES). Here we report the discovery and spectroscopic confirmation of
the $z_AB, Y_AB$ = 20.2, 20.2 (M$_1450$ = $-$26.5) quasar DES
J0454$-$4448 with an emission line redshift of z = 6.10$\pm$0.03 and a HI near
zone size of 4.6 $\pm$ 1.7 Mpc.The quasar was selected as an i-band drop out
with i$-$z = 2.46 and z$_AB < 21.5$ from an area of $\sim$300 deg$^2$. It
is the brightest of our 43 candidates and was identified for follow-up
spectroscopically solely based on the DES i$-$z and z$-$Y colours. The quasar
is detected by WISE and has $W1_AB = 19.68$. The discovery of one
spectroscopically confirmed quasar with 5.7 $<$ z $<$ 6.5 and z$_AB łeq$
20.2 is consistent with recent determinations of the luminosity function at z
$\sim$ 6. DES when completed will have imaged $\sim$5000 deg$^2$ to
$Y_AB$ = 23.0 ($5\sigma$ 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
including determination of the neutral HI fraction of the intergalactic medium
(IGM) during the epoch of Hydrogen reionization.
Description
[1504.03264] DES J0454$-$4448: Discovery of the First Luminous z $\ge$ 6 Quasar from the Dark Energy Survey
%0 Generic
%1 reed2015j04544448
%A Reed, S. L.
%A McMahon, R. G.
%A Banerji, M.
%A Becker, G. D.
%A Gonzalez-Solares, E.
%A Martini, P.
%A Ostrovski, F.
%A Rauch, M.
%A Abbott, T.
%A Abdalla, F. B.
%A Allam, S.
%A Benoit-Levy, A.
%A Bertin, E.
%A Buckley-Geer, E.
%A Burke, D.
%A Rosell, A. Carnero
%A da Costa, L. N.
%A ĎAndrea, C.
%A DePoy, D. L.
%A Desai, S.
%A Diehl, H. T.
%A Doel, P.
%A Cunha, C. E
%A Estrada, J.
%A Evrard, A. E.
%A Neto, A. Fausti
%A Finley, D. A.
%A Fosalba, P.
%A Frieman, J.
%A Gruen, D.
%A Honscheid, K.
%A James, D.
%A Kent, S.
%A Kuehn, K.
%A Kuropatkin, N.
%A Lahav, O.
%A Maia, M. A. G.
%A Makler, M.
%A Marshall, J.
%A Merritt, K.
%A Miquel, R.
%A Mohr, J.
%A Nord, B.
%A Ogando, R.
%A Plazas, A.
%A Romer, K.
%A Roodman, A.
%A Rykoff, E.
%A Sako, M.
%A Sanchez, E.
%A Santiago, B.
%A Schubnell, M.
%A Sevilla, I.
%A Smith, C.
%A Soares-Santos, M.
%A Suchyta, E.
%A Swanson, M. E. C.
%A Tarle, G.
%A Thomas, D.
%A Tucker, D.
%A Walker, A.
%A Wechsler, R. H.
%D 2015
%K des high-z quasar
%T DES J0454$-$4448: Discovery of the First Luminous z $\ge$ 6 Quasar from
the Dark Energy Survey
%U http://arxiv.org/abs/1504.03264
%X We present the first results of a survey for high redshift, z $\ge$ 6,
quasars using izY multi-colour photometric observations from the Dark Energy
Survey (DES). Here we report the discovery and spectroscopic confirmation of
the $z_AB, Y_AB$ = 20.2, 20.2 (M$_1450$ = $-$26.5) quasar DES
J0454$-$4448 with an emission line redshift of z = 6.10$\pm$0.03 and a HI near
zone size of 4.6 $\pm$ 1.7 Mpc.The quasar was selected as an i-band drop out
with i$-$z = 2.46 and z$_AB < 21.5$ from an area of $\sim$300 deg$^2$. It
is the brightest of our 43 candidates and was identified for follow-up
spectroscopically solely based on the DES i$-$z and z$-$Y colours. The quasar
is detected by WISE and has $W1_AB = 19.68$. The discovery of one
spectroscopically confirmed quasar with 5.7 $<$ z $<$ 6.5 and z$_AB łeq$
20.2 is consistent with recent determinations of the luminosity function at z
$\sim$ 6. DES when completed will have imaged $\sim$5000 deg$^2$ to
$Y_AB$ = 23.0 ($5\sigma$ 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
including determination of the neutral HI fraction of the intergalactic medium
(IGM) during the epoch of Hydrogen reionization.
@misc{reed2015j04544448,
abstract = {We present the first results of a survey for high redshift, z $\ge$ 6,
quasars using izY multi-colour photometric observations from the Dark Energy
Survey (DES). Here we report the discovery and spectroscopic confirmation of
the $\rm z_{AB}, Y_{AB}$ = 20.2, 20.2 (M$_{1450}$ = $-$26.5) quasar DES
J0454$-$4448 with an emission line redshift of z = 6.10$\pm$0.03 and a HI near
zone size of 4.6 $\pm$ 1.7 Mpc.The quasar was selected as an i-band drop out
with i$-$z = 2.46 and z$_{AB} < 21.5$ from an area of $\rm \sim$300 deg$^2$. It
is the brightest of our 43 candidates and was identified for follow-up
spectroscopically solely based on the DES i$-$z and z$-$Y colours. The quasar
is detected by WISE and has $W1_{AB} = 19.68$. The discovery of one
spectroscopically confirmed quasar with 5.7 $<$ z $<$ 6.5 and z$_{AB} \leq$
20.2 is consistent with recent determinations of the luminosity function at z
$\sim$ 6. DES when completed will have imaged $\rm \sim$5000 deg$^2$ to
$Y_{AB}$ = 23.0 ($5\sigma$ 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
including determination of the neutral HI fraction of the intergalactic medium
(IGM) during the epoch of Hydrogen reionization.},
added-at = {2015-04-14T09:50:08.000+0200},
author = {Reed, S. L. and McMahon, R. G. and Banerji, M. and Becker, G. D. and Gonzalez-Solares, E. and Martini, P. and Ostrovski, F. and Rauch, M. and Abbott, T. and Abdalla, F. B. and Allam, S. and Benoit-Levy, A. and Bertin, E. and Buckley-Geer, E. and Burke, D. and Rosell, A. Carnero and da Costa, L. N. and ĎAndrea, C. and DePoy, D. L. and Desai, S. and Diehl, H. T. and Doel, P. and Cunha, C. E and Estrada, J. and Evrard, A. E. and Neto, A. Fausti and Finley, D. A. and Fosalba, P. and Frieman, J. and Gruen, D. and Honscheid, K. and James, D. and Kent, S. and Kuehn, K. and Kuropatkin, N. and Lahav, O. and Maia, M. A. G. and Makler, M. and Marshall, J. and Merritt, K. and Miquel, R. and Mohr, J. and Nord, B. and Ogando, R. and Plazas, A. and Romer, K. and Roodman, A. and Rykoff, E. and Sako, M. and Sanchez, E. and Santiago, B. and Schubnell, M. and Sevilla, I. and Smith, C. and Soares-Santos, M. and Suchyta, E. and Swanson, M. E. C. and Tarle, G. and Thomas, D. and Tucker, D. and Walker, A. and Wechsler, R. H.},
biburl = {https://www.bibsonomy.org/bibtex/21a2e0fa7bb9d206c0b65ec645edc09d5/miki},
description = {[1504.03264] DES J0454$-$4448: Discovery of the First Luminous z $\ge$ 6 Quasar from the Dark Energy Survey},
interhash = {4402f6aadc0d835976f6d5c93f51d8d4},
intrahash = {1a2e0fa7bb9d206c0b65ec645edc09d5},
keywords = {des high-z quasar},
note = {cite arxiv:1504.03264},
timestamp = {2015-04-14T09:50:08.000+0200},
title = {DES J0454$-$4448: Discovery of the First Luminous z $\ge$ 6 Quasar from
the Dark Energy Survey},
url = {http://arxiv.org/abs/1504.03264},
year = 2015
}