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Three new VHS-DES quasars at 6.7 < z < 6.9 and emission line properties at z > 6.5

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Three new VHS-DES quasars at 6.7 < z < 6.9 and emission line properties at z > 6.5. / Reed, Sophie L.; Banerji, M.; Becker, G. D.; Hewett, Paul C.; Martini, Paul; McMahon, R.; Pons, E.; Rauch, M.; Abbott, T. M. C.; Allam, Sahar S.; Annis, James T.; Avila Perez, Santiago Javier; Bertin, Emmanuel; Brooks, D.; Buckley-Geer, Elizabeth J.; Rosell, Aurelio Carnero; Carretero, Jorge; Castander, Francisco Javier; Cunha, C. E.; D'Andrea, Christopher Brian; da Costa, Luiz Alberto Nicolaci; Vicente, Juan de; Desai, S.; Diehl, H. Thomas; Doel, Peter; Evrard, A. E.; Flaugher, B.; Frieman, Joshua A.; García-Bellido, Juan; Gaztanaga, Enrique; Gruen, Daniel; Gschwend, Julia; Gutierrez, G.; Honscheid, Klaus; Hoyle, Ben; James, Derek; Kuehn, Kyler; Lahav, O.; Lima, M.; Geimba Maia, Marcio Antonio; Marshall, J. L.; Miquel, Ramon; Ogando, Ricardo L. C.; Plazas, Andres A.; Roodman, Aaron; Sanchez, Eusebio; Scarpine, Vic; Schubnell, Michael; Serrano, Santiago; Sevilla-Noarbe, Ignacio; Smith, Mathew; Smith, Robert Chris; Sobreira, Flavia; Suchyta, Eric; Swanson, Molly E. C.; Tarle, Gregory; Thomas, Daniel B.; Tucker, Douglas L.; Vikram, Vinu.

In: Monthly Notices of the Royal Astronomical Society, Vol. 487, No. 2, 01.08.2019, p. 1874-1885.

Research output: Contribution to journalArticle

Harvard

Reed, SL, Banerji, M, Becker, GD, Hewett, PC, Martini, P, McMahon, R, Pons, E, Rauch, M, Abbott, TMC, Allam, SS, Annis, JT, Avila Perez, SJ, Bertin, E, Brooks, D, Buckley-Geer, EJ, Rosell, AC, Carretero, J, Castander, FJ, Cunha, CE, D'Andrea, CB, da Costa, LAN, Vicente, JD, Desai, S, Diehl, HT, Doel, P, Evrard, AE, Flaugher, B, Frieman, JA, García-Bellido, J, Gaztanaga, E, Gruen, D, Gschwend, J, Gutierrez, G, Honscheid, K, Hoyle, B, James, D, Kuehn, K, Lahav, O, Lima, M, Geimba Maia, MA, Marshall, JL, Miquel, R, Ogando, RLC, Plazas, AA, Roodman, A, Sanchez, E, Scarpine, V, Schubnell, M, Serrano, S, Sevilla-Noarbe, I, Smith, M, Smith, RC, Sobreira, F, Suchyta, E, Swanson, MEC, Tarle, G, Thomas, DB, Tucker, DL & Vikram, V 2019, 'Three new VHS-DES quasars at 6.7 < z < 6.9 and emission line properties at z > 6.5', Monthly Notices of the Royal Astronomical Society, vol. 487, no. 2, pp. 1874-1885. https://doi.org/10.1093/mnras/stz1341

APA

Reed, S. L., Banerji, M., Becker, G. D., Hewett, P. C., Martini, P., McMahon, R., ... Vikram, V. (2019). Three new VHS-DES quasars at 6.7 < z < 6.9 and emission line properties at z > 6.5. Monthly Notices of the Royal Astronomical Society, 487(2), 1874-1885. https://doi.org/10.1093/mnras/stz1341

Vancouver

Reed SL, Banerji M, Becker GD, Hewett PC, Martini P, McMahon R et al. Three new VHS-DES quasars at 6.7 < z < 6.9 and emission line properties at z > 6.5. Monthly Notices of the Royal Astronomical Society. 2019 Aug 1;487(2):1874-1885. https://doi.org/10.1093/mnras/stz1341

Author

Reed, Sophie L. ; Banerji, M. ; Becker, G. D. ; Hewett, Paul C. ; Martini, Paul ; McMahon, R. ; Pons, E. ; Rauch, M. ; Abbott, T. M. C. ; Allam, Sahar S. ; Annis, James T. ; Avila Perez, Santiago Javier ; Bertin, Emmanuel ; Brooks, D. ; Buckley-Geer, Elizabeth J. ; Rosell, Aurelio Carnero ; Carretero, Jorge ; Castander, Francisco Javier ; Cunha, C. E. ; D'Andrea, Christopher Brian ; da Costa, Luiz Alberto Nicolaci ; Vicente, Juan de ; Desai, S. ; Diehl, H. Thomas ; Doel, Peter ; Evrard, A. E. ; Flaugher, B. ; Frieman, Joshua A. ; García-Bellido, Juan ; Gaztanaga, Enrique ; Gruen, Daniel ; Gschwend, Julia ; Gutierrez, G. ; Honscheid, Klaus ; Hoyle, Ben ; James, Derek ; Kuehn, Kyler ; Lahav, O. ; Lima, M. ; Geimba Maia, Marcio Antonio ; Marshall, J. L. ; Miquel, Ramon ; Ogando, Ricardo L. C. ; Plazas, Andres A. ; Roodman, Aaron ; Sanchez, Eusebio ; Scarpine, Vic ; Schubnell, Michael ; Serrano, Santiago ; Sevilla-Noarbe, Ignacio ; Smith, Mathew ; Smith, Robert Chris ; Sobreira, Flavia ; Suchyta, Eric ; Swanson, Molly E. C. ; Tarle, Gregory ; Thomas, Daniel B. ; Tucker, Douglas L. ; Vikram, Vinu. / Three new VHS-DES quasars at 6.7 < z < 6.9 and emission line properties at z > 6.5. In: Monthly Notices of the Royal Astronomical Society. 2019 ; Vol. 487, No. 2. pp. 1874-1885.

Bibtex

@article{5da03a66f89b44bab6bd213e03f24d82,
title = "Three new VHS-DES quasars at 6.7 < z < 6.9 and emission line properties at z > 6.5",
abstract = "We report the results from a search for z > 6.5 quasars using the Dark Energy Survey (DES) Year 3 data set combined with the VISTA Hemisphere Survey (VHS) and WISE All-Sky Survey. Our photometric selection method is shown to be highly efficient in identifying clean samples of high-redshift quasars, leading to spectroscopic confirmation of three new quasars – VDES J0244−5008 (z = 6.724), VDES J0020−3653 (z = 6.834), and VDES J0246−5219 (z = 6.90) – which were selected as the highest priority candidates in the survey data without any need for additional follow-up observations. We have obtained spectroscopic observations in the near-infrared for VDES J0244−5008 and VDES J0020−3653 as well as our previously identified quasar, VDES J0224−4711 at z = 6.50 from Reed et al. We use the near-infrared spectra to derive virial black hole masses from the full width at half-maximum of the Mg II line. These black hole masses are ≃1–2 × 109 M⊙. Combined with the bolometric luminosities of these quasars of Lbol ≃ 1–3 × 1047, these imply that the Eddington ratios are high, ≃0.6–1.1. We consider the C IV emission line properties of the sample and demonstrate that our high-redshift quasars do not have unusual C IV line properties when compared to carefully matched low-redshift samples. Our new DES + VHS z > 6.5 quasars now add to the growing census of luminous, rapidly accreting supermassive black holes seen well into the epoch of reionization.",
keywords = "galaxies: active, galaxies: formation, galaxies: high-redshift, dark ages, reionization, first stars, quasars: individual: VDES J0224-4711, quasars: indiviual: VDES J0244-5008, quasars: individual: VDES J0020-3653, quasars: individual: VDES J0246-5219, RCUK, STFC",
author = "Reed, {Sophie L.} and M. Banerji and Becker, {G. D.} and Hewett, {Paul C.} and Paul Martini and R. McMahon and E. Pons and M. Rauch and Abbott, {T. M. C.} and Allam, {Sahar S.} and Annis, {James T.} and {Avila Perez}, {Santiago Javier} and Emmanuel Bertin and D. Brooks and Buckley-Geer, {Elizabeth J.} and Rosell, {Aurelio Carnero} and Jorge Carretero and Castander, {Francisco Javier} and Cunha, {C. E.} and D'Andrea, {Christopher Brian} and {da Costa}, {Luiz Alberto Nicolaci} and Vicente, {Juan de} and S. Desai and Diehl, {H. Thomas} and Peter Doel and Evrard, {A. E.} and B. Flaugher and Frieman, {Joshua A.} and Juan Garc{\'i}a-Bellido and Enrique Gaztanaga and Daniel Gruen and Julia Gschwend and G. Gutierrez and Klaus Honscheid and Ben Hoyle and Derek James and Kyler Kuehn and O. Lahav and M. Lima and {Geimba Maia}, {Marcio Antonio} and Marshall, {J. L.} and Ramon Miquel and Ogando, {Ricardo L. C.} and Plazas, {Andres A.} and Aaron Roodman and Eusebio Sanchez and Vic Scarpine and Michael Schubnell and Santiago Serrano and Ignacio Sevilla-Noarbe and Mathew Smith and Smith, {Robert Chris} and Flavia Sobreira and Eric Suchyta and Swanson, {Molly E. C.} and Gregory Tarle and Thomas, {Daniel B.} and Tucker, {Douglas L.} and Vinu Vikram",
year = "2019",
month = "8",
day = "1",
doi = "10.1093/mnras/stz1341",
language = "English",
volume = "487",
pages = "1874--1885",
journal = "MNRAS",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "2",

}

RIS

TY - JOUR

T1 - Three new VHS-DES quasars at 6.7 < z < 6.9 and emission line properties at z > 6.5

AU - Reed, Sophie L.

AU - Banerji, M.

AU - Becker, G. D.

AU - Hewett, Paul C.

AU - Martini, Paul

AU - McMahon, R.

AU - Pons, E.

AU - Rauch, M.

AU - Abbott, T. M. C.

AU - Allam, Sahar S.

AU - Annis, James T.

AU - Avila Perez, Santiago Javier

AU - Bertin, Emmanuel

AU - Brooks, D.

AU - Buckley-Geer, Elizabeth J.

AU - Rosell, Aurelio Carnero

AU - Carretero, Jorge

AU - Castander, Francisco Javier

AU - Cunha, C. E.

AU - D'Andrea, Christopher Brian

AU - da Costa, Luiz Alberto Nicolaci

AU - Vicente, Juan de

AU - Desai, S.

AU - Diehl, H. Thomas

AU - Doel, Peter

AU - Evrard, A. E.

AU - Flaugher, B.

AU - Frieman, Joshua A.

AU - García-Bellido, Juan

AU - Gaztanaga, Enrique

AU - Gruen, Daniel

AU - Gschwend, Julia

AU - Gutierrez, G.

AU - Honscheid, Klaus

AU - Hoyle, Ben

AU - James, Derek

AU - Kuehn, Kyler

AU - Lahav, O.

AU - Lima, M.

AU - Geimba Maia, Marcio Antonio

AU - Marshall, J. L.

AU - Miquel, Ramon

AU - Ogando, Ricardo L. C.

AU - Plazas, Andres A.

AU - Roodman, Aaron

AU - Sanchez, Eusebio

AU - Scarpine, Vic

AU - Schubnell, Michael

AU - Serrano, Santiago

AU - Sevilla-Noarbe, Ignacio

AU - Smith, Mathew

AU - Smith, Robert Chris

AU - Sobreira, Flavia

AU - Suchyta, Eric

AU - Swanson, Molly E. C.

AU - Tarle, Gregory

AU - Thomas, Daniel B.

AU - Tucker, Douglas L.

AU - Vikram, Vinu

PY - 2019/8/1

Y1 - 2019/8/1

N2 - We report the results from a search for z > 6.5 quasars using the Dark Energy Survey (DES) Year 3 data set combined with the VISTA Hemisphere Survey (VHS) and WISE All-Sky Survey. Our photometric selection method is shown to be highly efficient in identifying clean samples of high-redshift quasars, leading to spectroscopic confirmation of three new quasars – VDES J0244−5008 (z = 6.724), VDES J0020−3653 (z = 6.834), and VDES J0246−5219 (z = 6.90) – which were selected as the highest priority candidates in the survey data without any need for additional follow-up observations. We have obtained spectroscopic observations in the near-infrared for VDES J0244−5008 and VDES J0020−3653 as well as our previously identified quasar, VDES J0224−4711 at z = 6.50 from Reed et al. We use the near-infrared spectra to derive virial black hole masses from the full width at half-maximum of the Mg II line. These black hole masses are ≃1–2 × 109 M⊙. Combined with the bolometric luminosities of these quasars of Lbol ≃ 1–3 × 1047, these imply that the Eddington ratios are high, ≃0.6–1.1. We consider the C IV emission line properties of the sample and demonstrate that our high-redshift quasars do not have unusual C IV line properties when compared to carefully matched low-redshift samples. Our new DES + VHS z > 6.5 quasars now add to the growing census of luminous, rapidly accreting supermassive black holes seen well into the epoch of reionization.

AB - We report the results from a search for z > 6.5 quasars using the Dark Energy Survey (DES) Year 3 data set combined with the VISTA Hemisphere Survey (VHS) and WISE All-Sky Survey. Our photometric selection method is shown to be highly efficient in identifying clean samples of high-redshift quasars, leading to spectroscopic confirmation of three new quasars – VDES J0244−5008 (z = 6.724), VDES J0020−3653 (z = 6.834), and VDES J0246−5219 (z = 6.90) – which were selected as the highest priority candidates in the survey data without any need for additional follow-up observations. We have obtained spectroscopic observations in the near-infrared for VDES J0244−5008 and VDES J0020−3653 as well as our previously identified quasar, VDES J0224−4711 at z = 6.50 from Reed et al. We use the near-infrared spectra to derive virial black hole masses from the full width at half-maximum of the Mg II line. These black hole masses are ≃1–2 × 109 M⊙. Combined with the bolometric luminosities of these quasars of Lbol ≃ 1–3 × 1047, these imply that the Eddington ratios are high, ≃0.6–1.1. We consider the C IV emission line properties of the sample and demonstrate that our high-redshift quasars do not have unusual C IV line properties when compared to carefully matched low-redshift samples. Our new DES + VHS z > 6.5 quasars now add to the growing census of luminous, rapidly accreting supermassive black holes seen well into the epoch of reionization.

KW - galaxies: active

KW - galaxies: formation

KW - galaxies: high-redshift

KW - dark ages

KW - reionization

KW - first stars

KW - quasars: individual: VDES J0224-4711

KW - quasars: indiviual: VDES J0244-5008

KW - quasars: individual: VDES J0020-3653

KW - quasars: individual: VDES J0246-5219

KW - RCUK

KW - STFC

U2 - 10.1093/mnras/stz1341

DO - 10.1093/mnras/stz1341

M3 - Article

VL - 487

SP - 1874

EP - 1885

JO - MNRAS

JF - MNRAS

SN - 0035-8711

IS - 2

ER -

ID: 15701934