Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/343495
Full metadata record
DC FieldValueLanguage
dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampSobreira, Flávia-
dc.typeArtigopt_BR
dc.titleThree new VHS–DES quasars at 6.7 < z < 6.9 and emission line properties at z > 6.5pt_BR
dc.contributor.authorReed, S L-
dc.subjectGaláxiaspt_BR
dc.subject.otherlanguageGalaxiespt_BR
dc.description.abstractWe 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 reionizationpt_BR
dc.relation.ispartofMonthly notices of the Royal Astronomical Societypt_BR
dc.relation.ispartofabbreviationMon. not. R. Astron. Soc.pt_BR
dc.publisher.cityOxfordpt_BR
dc.publisher.countryReino Unidopt_BR
dc.publisherOxford University Presspt_BR
dc.date.issued2019-
dc.date.monthofcirculationAug.pt_BR
dc.language.isoengpt_BR
dc.description.volume487pt_BR
dc.description.issuenumber2pt_BR
dc.description.firstpage1874pt_BR
dc.description.lastpage1885pt_BR
dc.rightsAbertopt_BR
dc.sourceSCOPUSpt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.eissn1365-2966pt_BR
dc.identifier.doi10.1093/mnras/stz1341pt_BR
dc.identifier.urlhttps://academic.oup.com/mnras/article/487/2/1874/5505847pt_BR
dc.date.available2020-06-18T14:16:44Z-
dc.date.accessioned2020-06-18T14:16:44Z-
dc.description.provenanceSubmitted by Susilene Barbosa da Silva (susilene@unicamp.br) on 2020-06-18T14:16:44Z No. of bitstreams: 0. Added 1 bitstream(s) on 2020-09-03T11:56:33Z : No. of bitstreams: 1 2-s2.0-85071134457.pdf: 4549888 bytes, checksum: 05be491420d202e12a3a165f5b20587b (MD5)en
dc.description.provenanceMade available in DSpace on 2020-06-18T14:16:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2019en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/343495-
dc.contributor.departmentDepartamento de Raios Cósmicos e Cronologiapt_BR
dc.contributor.unidadeInstituto de Física Gleb Wataghinpt_BR
dc.subject.keywordHigh-redshiftpt_BR
dc.subject.keywordDark agespt_BR
dc.subject.keywordIndividual: VDES J0224−4711pt_BR
dc.identifier.source2-s2.0-85071134457pt_BR
dc.creator.orcid0000-0002-7822-0658pt_BR
dc.type.formArtigopt_BR
Appears in Collections:IFGW - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
2-s2.0-85071134457.pdf4.44 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.