Discovery of eight z ∼ 6 quasars from Pan-STARRS1

E. Bañados, B. P. Venemans, E. Morganson, R. Decarli, F. Walter, K. C. Chambers, H. W. Rix, E. P. Farina, Xiaohui Fan, L. Jiang, I. McGreer, G. De Rosa, R. Simcoe, A. Weiß, P. A. Price, J. S. Morgan, W. S. Burgett, J. Greiner, N. Kaiser, R. P. KudritzkiE. A. Magnier, N. Metcalfe, C. W. Stubbs, W. Sweeney, J. L. Tonry, R. J. Wainscoat, C. Waters

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

High-redshift quasars are currently the only probes of the growth of supermassive black holes and potential tracers of structure evolution at early cosmic time. Here we present our candidate selection criteria from the Panoramic Survey Telescope & Rapid Response System 1 and follow-up strategy to discover quasars in the redshift range 5.7 ≲ z ≲ 6.2. With this strategy we discovered eight new 5.7 ≤ z ≤ 6.0 quasars, increasing the number of known quasars at z > 5.7 by more than 10%. We additionally recovered 18 previously known quasars. The eight quasars presented here span a large range of luminosities (-27.3 ≤ M1450 ≤ -25.4; 19.6 ≤ zP1 ≤ 21.2) and are remarkably heterogeneous in their spectral features: half of them show bright emission lines whereas the other half show a weak or no Lyα emission line (25% with rest-frame equivalent width of the Lyα +N V line lower than 15 Å). We find a larger fraction of weak-line emission quasars than in lower redshift studies. This may imply that the weak-line quasar population at the highest redshifts could be more abundant than previously thought. However, larger samples of quasars are needed to increase the statistical significance of this finding.

Original languageEnglish (US)
Article number14
JournalAstronomical Journal
Volume148
Issue number1
DOIs
StatePublished - 2014

Fingerprint

quasars
tracer
probe
tracers
luminosity
telescopes
probes

Keywords

  • cosmology: observations
  • quasars: emission lines
  • quasars: general
  • surveys

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Bañados, E., Venemans, B. P., Morganson, E., Decarli, R., Walter, F., Chambers, K. C., ... Waters, C. (2014). Discovery of eight z ∼ 6 quasars from Pan-STARRS1. Astronomical Journal, 148(1), [14]. https://doi.org/10.1088/0004-6256/148/1/14

Discovery of eight z ∼ 6 quasars from Pan-STARRS1. / Bañados, E.; Venemans, B. P.; Morganson, E.; Decarli, R.; Walter, F.; Chambers, K. C.; Rix, H. W.; Farina, E. P.; Fan, Xiaohui; Jiang, L.; McGreer, I.; De Rosa, G.; Simcoe, R.; Weiß, A.; Price, P. A.; Morgan, J. S.; Burgett, W. S.; Greiner, J.; Kaiser, N.; Kudritzki, R. P.; Magnier, E. A.; Metcalfe, N.; Stubbs, C. W.; Sweeney, W.; Tonry, J. L.; Wainscoat, R. J.; Waters, C.

In: Astronomical Journal, Vol. 148, No. 1, 14, 2014.

Research output: Contribution to journalArticle

Bañados, E, Venemans, BP, Morganson, E, Decarli, R, Walter, F, Chambers, KC, Rix, HW, Farina, EP, Fan, X, Jiang, L, McGreer, I, De Rosa, G, Simcoe, R, Weiß, A, Price, PA, Morgan, JS, Burgett, WS, Greiner, J, Kaiser, N, Kudritzki, RP, Magnier, EA, Metcalfe, N, Stubbs, CW, Sweeney, W, Tonry, JL, Wainscoat, RJ & Waters, C 2014, 'Discovery of eight z ∼ 6 quasars from Pan-STARRS1', Astronomical Journal, vol. 148, no. 1, 14. https://doi.org/10.1088/0004-6256/148/1/14
Bañados E, Venemans BP, Morganson E, Decarli R, Walter F, Chambers KC et al. Discovery of eight z ∼ 6 quasars from Pan-STARRS1. Astronomical Journal. 2014;148(1). 14. https://doi.org/10.1088/0004-6256/148/1/14
Bañados, E. ; Venemans, B. P. ; Morganson, E. ; Decarli, R. ; Walter, F. ; Chambers, K. C. ; Rix, H. W. ; Farina, E. P. ; Fan, Xiaohui ; Jiang, L. ; McGreer, I. ; De Rosa, G. ; Simcoe, R. ; Weiß, A. ; Price, P. A. ; Morgan, J. S. ; Burgett, W. S. ; Greiner, J. ; Kaiser, N. ; Kudritzki, R. P. ; Magnier, E. A. ; Metcalfe, N. ; Stubbs, C. W. ; Sweeney, W. ; Tonry, J. L. ; Wainscoat, R. J. ; Waters, C. / Discovery of eight z ∼ 6 quasars from Pan-STARRS1. In: Astronomical Journal. 2014 ; Vol. 148, No. 1.
@article{0fab177a203d4a01864e0c92e32eddc2,
title = "Discovery of eight z ∼ 6 quasars from Pan-STARRS1",
abstract = "High-redshift quasars are currently the only probes of the growth of supermassive black holes and potential tracers of structure evolution at early cosmic time. Here we present our candidate selection criteria from the Panoramic Survey Telescope & Rapid Response System 1 and follow-up strategy to discover quasars in the redshift range 5.7 ≲ z ≲ 6.2. With this strategy we discovered eight new 5.7 ≤ z ≤ 6.0 quasars, increasing the number of known quasars at z > 5.7 by more than 10{\%}. We additionally recovered 18 previously known quasars. The eight quasars presented here span a large range of luminosities (-27.3 ≤ M1450 ≤ -25.4; 19.6 ≤ zP1 ≤ 21.2) and are remarkably heterogeneous in their spectral features: half of them show bright emission lines whereas the other half show a weak or no Lyα emission line (25{\%} with rest-frame equivalent width of the Lyα +N V line lower than 15 {\AA}). We find a larger fraction of weak-line emission quasars than in lower redshift studies. This may imply that the weak-line quasar population at the highest redshifts could be more abundant than previously thought. However, larger samples of quasars are needed to increase the statistical significance of this finding.",
keywords = "cosmology: observations, quasars: emission lines, quasars: general, surveys",
author = "E. Ba{\~n}ados and Venemans, {B. P.} and E. Morganson and R. Decarli and F. Walter and Chambers, {K. C.} and Rix, {H. W.} and Farina, {E. P.} and Xiaohui Fan and L. Jiang and I. McGreer and {De Rosa}, G. and R. Simcoe and A. Wei{\ss} and Price, {P. A.} and Morgan, {J. S.} and Burgett, {W. S.} and J. Greiner and N. Kaiser and Kudritzki, {R. P.} and Magnier, {E. A.} and N. Metcalfe and Stubbs, {C. W.} and W. Sweeney and Tonry, {J. L.} and Wainscoat, {R. J.} and C. Waters",
year = "2014",
doi = "10.1088/0004-6256/148/1/14",
language = "English (US)",
volume = "148",
journal = "Astronomical Journal",
issn = "0004-6256",
publisher = "IOP Publishing Ltd.",
number = "1",

}

TY - JOUR

T1 - Discovery of eight z ∼ 6 quasars from Pan-STARRS1

AU - Bañados, E.

AU - Venemans, B. P.

AU - Morganson, E.

AU - Decarli, R.

AU - Walter, F.

AU - Chambers, K. C.

AU - Rix, H. W.

AU - Farina, E. P.

AU - Fan, Xiaohui

AU - Jiang, L.

AU - McGreer, I.

AU - De Rosa, G.

AU - Simcoe, R.

AU - Weiß, A.

AU - Price, P. A.

AU - Morgan, J. S.

AU - Burgett, W. S.

AU - Greiner, J.

AU - Kaiser, N.

AU - Kudritzki, R. P.

AU - Magnier, E. A.

AU - Metcalfe, N.

AU - Stubbs, C. W.

AU - Sweeney, W.

AU - Tonry, J. L.

AU - Wainscoat, R. J.

AU - Waters, C.

PY - 2014

Y1 - 2014

N2 - High-redshift quasars are currently the only probes of the growth of supermassive black holes and potential tracers of structure evolution at early cosmic time. Here we present our candidate selection criteria from the Panoramic Survey Telescope & Rapid Response System 1 and follow-up strategy to discover quasars in the redshift range 5.7 ≲ z ≲ 6.2. With this strategy we discovered eight new 5.7 ≤ z ≤ 6.0 quasars, increasing the number of known quasars at z > 5.7 by more than 10%. We additionally recovered 18 previously known quasars. The eight quasars presented here span a large range of luminosities (-27.3 ≤ M1450 ≤ -25.4; 19.6 ≤ zP1 ≤ 21.2) and are remarkably heterogeneous in their spectral features: half of them show bright emission lines whereas the other half show a weak or no Lyα emission line (25% with rest-frame equivalent width of the Lyα +N V line lower than 15 Å). We find a larger fraction of weak-line emission quasars than in lower redshift studies. This may imply that the weak-line quasar population at the highest redshifts could be more abundant than previously thought. However, larger samples of quasars are needed to increase the statistical significance of this finding.

AB - High-redshift quasars are currently the only probes of the growth of supermassive black holes and potential tracers of structure evolution at early cosmic time. Here we present our candidate selection criteria from the Panoramic Survey Telescope & Rapid Response System 1 and follow-up strategy to discover quasars in the redshift range 5.7 ≲ z ≲ 6.2. With this strategy we discovered eight new 5.7 ≤ z ≤ 6.0 quasars, increasing the number of known quasars at z > 5.7 by more than 10%. We additionally recovered 18 previously known quasars. The eight quasars presented here span a large range of luminosities (-27.3 ≤ M1450 ≤ -25.4; 19.6 ≤ zP1 ≤ 21.2) and are remarkably heterogeneous in their spectral features: half of them show bright emission lines whereas the other half show a weak or no Lyα emission line (25% with rest-frame equivalent width of the Lyα +N V line lower than 15 Å). We find a larger fraction of weak-line emission quasars than in lower redshift studies. This may imply that the weak-line quasar population at the highest redshifts could be more abundant than previously thought. However, larger samples of quasars are needed to increase the statistical significance of this finding.

KW - cosmology: observations

KW - quasars: emission lines

KW - quasars: general

KW - surveys

UR - http://www.scopus.com/inward/record.url?scp=84902479798&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84902479798&partnerID=8YFLogxK

U2 - 10.1088/0004-6256/148/1/14

DO - 10.1088/0004-6256/148/1/14

M3 - Article

AN - SCOPUS:84902479798

VL - 148

JO - Astronomical Journal

JF - Astronomical Journal

SN - 0004-6256

IS - 1

M1 - 14

ER -