VDES J2325-5229 a z=2.7 gravitationally lensed quasar discovered using morphology-independent supervised machine learning
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1093/mnras/stw2958 http://hdl.handle.net/11449/162526 |
Resumo: | We present the discovery and preliminary characterization of a gravitationally lensed quasar with a source redshift z(s) = 2.74 and image separation of 2.9 arcsec lensed by a foreground z(l) = 0.40 elliptical galaxy. Since optical observations of gravitationally lensed quasars showthe lens system as a superposition of multiple point sources and a foreground lensing galaxy, we have developed a morphology-independent multi-wavelength approach to the photometric selection of lensed quasar candidates based on Gaussian Mixture Models (GMM) supervised machine learning. Using this technique and gi multicolour photometric observations from the Dark Energy Survey (DES), near-IR JK photometry from the VISTA Hemisphere Survey (VHS) and WISE mid-IR photometry, we have identified a candidate system with two catalogue components with i(AB) = 18.61 and i(AB) = 20.44 comprising an elliptical galaxy and two blue point sources. Spectroscopic follow-up with NTT and the use of an archival AAT spectrum show that the point sources can be identified as a lensed quasar with an emission line redshift of z = 2.739 +/- 0.003 and a foreground early-type galaxy with z = 0.400 +/- 0.002. We model the system as a single isothermal ellipsoid and find the Einstein radius theta(E) similar to 1.47 arcsec, enclosed mass M-enc similar to 4 x 10(11) M-circle dot and a time delay of similar to 52 d. The relatively wide separation, month scale time delay duration and high redshift make this an ideal system for constraining the expansion rate beyond a redshift of 1. |
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VDES J2325-5229 a z=2.7 gravitationally lensed quasar discovered using morphology-independent supervised machine learninggravitational lensing: strongmethods: observationalmethods: statisticalquasars: generalWe present the discovery and preliminary characterization of a gravitationally lensed quasar with a source redshift z(s) = 2.74 and image separation of 2.9 arcsec lensed by a foreground z(l) = 0.40 elliptical galaxy. Since optical observations of gravitationally lensed quasars showthe lens system as a superposition of multiple point sources and a foreground lensing galaxy, we have developed a morphology-independent multi-wavelength approach to the photometric selection of lensed quasar candidates based on Gaussian Mixture Models (GMM) supervised machine learning. Using this technique and gi multicolour photometric observations from the Dark Energy Survey (DES), near-IR JK photometry from the VISTA Hemisphere Survey (VHS) and WISE mid-IR photometry, we have identified a candidate system with two catalogue components with i(AB) = 18.61 and i(AB) = 20.44 comprising an elliptical galaxy and two blue point sources. Spectroscopic follow-up with NTT and the use of an archival AAT spectrum show that the point sources can be identified as a lensed quasar with an emission line redshift of z = 2.739 +/- 0.003 and a foreground early-type galaxy with z = 0.400 +/- 0.002. We model the system as a single isothermal ellipsoid and find the Einstein radius theta(E) similar to 1.47 arcsec, enclosed mass M-enc similar to 4 x 10(11) M-circle dot and a time delay of similar to 52 d. The relatively wide separation, month scale time delay duration and high redshift make this an ideal system for constraining the expansion rate beyond a redshift of 1.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Cambridge Commonwealth TrustUK Science and Technology Research Council (STFC)Raymond and Beverly Sackler visiting fellowship at the Institute of AstronomyU.S. Department of EnergyU.S. National Science FoundationMinistry of Science and Education of SpainScience and Technology Facilities Council of the United KingdomHigher Education Funding Council for EnglandNational Center for Supercomputing Applications at the University of Illinois at Urbana-ChampaignKavli Institute of Cosmological Physics at the University of ChicagoCenter for Cosmology and Astro-Particle Physics at the Ohio State UniversityMitchell Institute for Fundamental Physics and Astronomy at Texas AM UniversityFinanciadora de Estudos e ProjetosFundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Ministerio da Ciencia, Tecnologia e InovacaoDeutsche ForschungsgemeinschaftUniversity of California at Santa CruzUniversity of CambridgeCentro de Investigaciones Energeticas, Medioambientales y Tecnologicas-MadridUniversity of ChicagoUniversity College LondonDES-Brazil ConsortiumUniversity of EdinburghEidgenossische Technische Hochschule (ETH) ZurichFermi National Accelerator LaboratoryUniversity of Illinois at Urbana-ChampaignInstitut de Ciencies de l'Espai (IEEC/CSIC)Institut de Fisica d'Altes EnergiesLawrence Berkeley National LaboratoryLudwig-Maximilians Universitar MunchenUniversity of MichiganNational Optical Astronomy ObservatoryUniversity of NottinghamOhio State UniversityUniversity of PennsylvaniaUniversity of PortsmouthSLAC National Accelerator LaboratoryStanford UniversityUniversity of SussexTexas AM UniversityOzDES Membership ConsortiumNational Science FoundationMINECOCentro de Excelencia Severo OchoaEuropean Research Council under the European UnionESOAustralian Astronomical ObservatoryICREAScience and Technology Facilities CouncilUniv Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, EnglandUniv Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, EnglandMinist Educ Brazil, CAPES Fdn, BR-70040200 Brasilia, DF, BrazilUniv Washington, Dept Astron, Seattle, WA 98195 USACtr Math Sci, DAMTP, Cambridge CB3 0WA, EnglandUniv Wollongong, Sch Phys, Wollongong, NSW 2522, AustraliaAustralian Astron Observ, N Ryde, NSW, AustraliaFermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USACNRS, Inst Astrophys Paris, UMR 7095, F-75014 Paris, FranceUniv London Univ Coll, Dept Phys & Astron, Gower St, London WC1E 6BT, EnglandUPMC Univ Paris 06, Sorbonne Univ, Inst Astrophys Paris, UMR 7095, F-75014 Paris, FranceLab Interinst Astron LIneA, Rua Gal Jos Cristino 77, BR-20921400 Rio De Janeiro, RJ, BrazilObserv Nacl, Rua Gal Jos Cristino 77, BR-20921400 Rio De Janeiro, RJ, BrazilUniv Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USANatl Ctr Supercomp Applicat, 1205 West Clark St, Urbana, IL 61801 USAInst Ciencies Espai, IEEC CSIC, Campus UAB,Carrer Can Magrans S N, E-08193 Barcelona, SpainBarcelona Inst Sci & Technol, IFAE, Campus UAB, E-08193 Bellaterra, Barcelona, SpainStanford Univ, Kavli Inst Particle Astrophys & Cosmol, POB 2450, Stanford, CA 94305 USAExcellence Cluster Univ, Boltzmannstr 2, D-85748 Garching, GermanyLudwig Maximilians Univ Munchen, Fac Phys, Scheinerstr 1, D-81679 Munich, GermanyUniv Michigan, Dept Astron, Ann Arbor, MI 48109 USAUniv Michigan, Dept Phys, Ann Arbor, MI 48109 USAUniv Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USAUniv Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USALawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USASLAC Natl Accelerator Lab, Menlo Pk, Menlo Pk, CA 94025 USAOhio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USANatl Optic Astron Observ, Cerro Tololo Inter Amer Observ, Casilla 603, La Serena, ChileAustralian Astron Observ, N Ryde, NSW 2113, AustraliaUniv Sao Paulo, Inst Fis, Dept Fis Mat, CP 66318, BR-05314970 Sao Paulo, SP, BrazilTexas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USAOhio State Univ, Dept Astron, 174 W 18Th Ave, Columbus, OH 43210 USAPrinceton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USAInst Catalana Recerca & Estudis Avancats, E-08010 Barcelona, SpainCALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USAUniv Sussex, Dept Phys & Astron, Pevensey Bldg, Brighton BN1 9QH, E Sussex, EnglandCtr Invest Energet Medioambientales & Technol CIE, Madrid, SpainUniv Fed Rio Grande do Sul, Inst Fis, Caixa Postal 15051, BR-91501970 Porto Alegre, RS, BrazilUniv Estadual Paulista, ICTP Souh Amer Inst Fundamental Res, Inst Fis Teor, Sao Paulo, BrazilOak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USAUniv Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, EnglandUniv Estadual Paulista, ICTP Souh Amer Inst Fundamental Res, Inst Fis Teor, Sao Paulo, BrazilNational Science Foundation: AST-1138766MINECO: AYA2012-39559MINECO: ESP-201348274MINECO: FPA2013-47986Centro de Excelencia Severo Ochoa: SEV-2012-0234European Research Council under the European Union: 240672European Research Council under the European Union: 291329European Research Council under the European Union: 306478ESO: 179.A-2010ESO: 096.A-0411Australian Astronomical Observatory: A/2013A/018Australian Astronomical Observatory: A/2013B/001Science and Technology Facilities Council: ST/N004493/1Science and Technology Facilities Council: ST/M003914/1Science and Technology Facilities Council: ST/K004182/1Oxford Univ PressUniv CambridgeMinist Educ BrazilUniv WashingtonCtr Math SciUniv WollongongAustralian Astron ObservFermilab Natl Accelerator LabCNRSUniv London Univ CollUPMC Univ Paris 06Lab Interinst Astron LIneAObserv NaclUniv IllinoisNatl Ctr Supercomp ApplicatInst Ciencies EspaiBarcelona Inst Sci & TechnolStanford UnivExcellence Cluster UnivLudwig Maximilians Univ MunchenUniv MichiganUniv ChicagoUniv Calif BerkeleyLawrence Berkeley Natl LabSLAC Natl Accelerator LabOhio State UnivNatl Optic Astron ObservUniversidade de São Paulo (USP)Texas A&M UnivPrinceton UnivInst Catalana Recerca & Estudis AvancatsCALTECHUniv SussexCtr Invest Energet Medioambientales & Technol CIEUniv Fed Rio Grande do SulUniversidade Estadual Paulista (Unesp)Oak Ridge Natl LabUniv PortsmouthOstrovski, FernandaMcMahon, Richard G.Connolly, Andrew J.Lemon, Cameron A.Auger, Matthew W.Banerji, MandaHung, Johnathan M.Koposov, Sergey E.Lidman, Christopher E.Reed, Sophie L.Allam, SaharBenoit-Levy, AurelienBertin, EmmanuelBrooks, DavidBuckley-Geer, ElizabethRosell, Aurelio CarneroKind, Matias CarrascoCarretero, JorgeCunha, Carlos E.Costa, Luiz N. daDesai, ShantanuDiehl, H. ThomasDietrich, Jorg P.Evrard, August E.Finley, David A.Flaugher, BrennaFosalba, PabloFrieman, JoshGerdes, David W.Goldstein, Daniel A.Gruen, DanielGruendl, Robert A.Gutierrez, GastonHonscheid, KlausJames, David J.Kuehn, KylerKuropatkin, NikolayLima, MarcosLin, HuanMaia, Marcio A. G.Marshall, Jennifer L.Martini, PaulMelchior, PeterMiquel, RamonOgando, RicardoMalagon, Andres PlazasReil, KevinRomer, KathySanchez, EusebioSantiago, BasilioScarpine, VicSevilla-Noarbe, IgnacioSoares-Santos, MarcelleSobreira, Flavia [UNESP]Suchyta, EricTarle, GregoryThomas, DanielTucker, Douglas L.Walker, Alistair R.2018-11-26T17:20:09Z2018-11-26T17:20:09Z2017-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article4325-4334application/pdfhttp://dx.doi.org/10.1093/mnras/stw2958Monthly Notices Of The Royal Astronomical Society. Oxford: Oxford Univ Press, v. 465, n. 4, p. 4325-4334, 2017.0035-8711http://hdl.handle.net/11449/16252610.1093/mnras/stw2958WOS:000395170200041WOS000395170200041.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMonthly Notices Of The Royal Astronomical Society2,346info:eu-repo/semantics/openAccess2023-11-25T06:12:40Zoai:repositorio.unesp.br:11449/162526Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-25T06:12:40Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
VDES J2325-5229 a z=2.7 gravitationally lensed quasar discovered using morphology-independent supervised machine learning |
title |
VDES J2325-5229 a z=2.7 gravitationally lensed quasar discovered using morphology-independent supervised machine learning |
spellingShingle |
VDES J2325-5229 a z=2.7 gravitationally lensed quasar discovered using morphology-independent supervised machine learning Ostrovski, Fernanda gravitational lensing: strong methods: observational methods: statistical quasars: general |
title_short |
VDES J2325-5229 a z=2.7 gravitationally lensed quasar discovered using morphology-independent supervised machine learning |
title_full |
VDES J2325-5229 a z=2.7 gravitationally lensed quasar discovered using morphology-independent supervised machine learning |
title_fullStr |
VDES J2325-5229 a z=2.7 gravitationally lensed quasar discovered using morphology-independent supervised machine learning |
title_full_unstemmed |
VDES J2325-5229 a z=2.7 gravitationally lensed quasar discovered using morphology-independent supervised machine learning |
title_sort |
VDES J2325-5229 a z=2.7 gravitationally lensed quasar discovered using morphology-independent supervised machine learning |
author |
Ostrovski, Fernanda |
author_facet |
Ostrovski, Fernanda McMahon, Richard G. Connolly, Andrew J. Lemon, Cameron A. Auger, Matthew W. Banerji, Manda Hung, Johnathan M. Koposov, Sergey E. Lidman, Christopher E. Reed, Sophie L. Allam, Sahar Benoit-Levy, Aurelien Bertin, Emmanuel Brooks, David Buckley-Geer, Elizabeth Rosell, Aurelio Carnero Kind, Matias Carrasco Carretero, Jorge Cunha, Carlos E. Costa, Luiz N. da Desai, Shantanu Diehl, H. Thomas Dietrich, Jorg P. Evrard, August E. Finley, David A. Flaugher, Brenna Fosalba, Pablo Frieman, Josh Gerdes, David W. Goldstein, Daniel A. Gruen, Daniel Gruendl, Robert A. Gutierrez, Gaston Honscheid, Klaus James, David J. Kuehn, Kyler Kuropatkin, Nikolay Lima, Marcos Lin, Huan Maia, Marcio A. G. Marshall, Jennifer L. Martini, Paul Melchior, Peter Miquel, Ramon Ogando, Ricardo Malagon, Andres Plazas Reil, Kevin Romer, Kathy Sanchez, Eusebio Santiago, Basilio Scarpine, Vic Sevilla-Noarbe, Ignacio Soares-Santos, Marcelle Sobreira, Flavia [UNESP] Suchyta, Eric Tarle, Gregory Thomas, Daniel Tucker, Douglas L. Walker, Alistair R. |
author_role |
author |
author2 |
McMahon, Richard G. Connolly, Andrew J. Lemon, Cameron A. Auger, Matthew W. Banerji, Manda Hung, Johnathan M. Koposov, Sergey E. Lidman, Christopher E. Reed, Sophie L. Allam, Sahar Benoit-Levy, Aurelien Bertin, Emmanuel Brooks, David Buckley-Geer, Elizabeth Rosell, Aurelio Carnero Kind, Matias Carrasco Carretero, Jorge Cunha, Carlos E. Costa, Luiz N. da Desai, Shantanu Diehl, H. Thomas Dietrich, Jorg P. Evrard, August E. Finley, David A. Flaugher, Brenna Fosalba, Pablo Frieman, Josh Gerdes, David W. Goldstein, Daniel A. Gruen, Daniel Gruendl, Robert A. Gutierrez, Gaston Honscheid, Klaus James, David J. Kuehn, Kyler Kuropatkin, Nikolay Lima, Marcos Lin, Huan Maia, Marcio A. G. Marshall, Jennifer L. Martini, Paul Melchior, Peter Miquel, Ramon Ogando, Ricardo Malagon, Andres Plazas Reil, Kevin Romer, Kathy Sanchez, Eusebio Santiago, Basilio Scarpine, Vic Sevilla-Noarbe, Ignacio Soares-Santos, Marcelle Sobreira, Flavia [UNESP] Suchyta, Eric Tarle, Gregory Thomas, Daniel Tucker, Douglas L. Walker, Alistair R. |
author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Univ Cambridge Minist Educ Brazil Univ Washington Ctr Math Sci Univ Wollongong Australian Astron Observ Fermilab Natl Accelerator Lab CNRS Univ London Univ Coll UPMC Univ Paris 06 Lab Interinst Astron LIneA Observ Nacl Univ Illinois Natl Ctr Supercomp Applicat Inst Ciencies Espai Barcelona Inst Sci & Technol Stanford Univ Excellence Cluster Univ Ludwig Maximilians Univ Munchen Univ Michigan Univ Chicago Univ Calif Berkeley Lawrence Berkeley Natl Lab SLAC Natl Accelerator Lab Ohio State Univ Natl Optic Astron Observ Universidade de São Paulo (USP) Texas A&M Univ Princeton Univ Inst Catalana Recerca & Estudis Avancats CALTECH Univ Sussex Ctr Invest Energet Medioambientales & Technol CIE Univ Fed Rio Grande do Sul Universidade Estadual Paulista (Unesp) Oak Ridge Natl Lab Univ Portsmouth |
dc.contributor.author.fl_str_mv |
Ostrovski, Fernanda McMahon, Richard G. Connolly, Andrew J. Lemon, Cameron A. Auger, Matthew W. Banerji, Manda Hung, Johnathan M. Koposov, Sergey E. Lidman, Christopher E. Reed, Sophie L. Allam, Sahar Benoit-Levy, Aurelien Bertin, Emmanuel Brooks, David Buckley-Geer, Elizabeth Rosell, Aurelio Carnero Kind, Matias Carrasco Carretero, Jorge Cunha, Carlos E. Costa, Luiz N. da Desai, Shantanu Diehl, H. Thomas Dietrich, Jorg P. Evrard, August E. Finley, David A. Flaugher, Brenna Fosalba, Pablo Frieman, Josh Gerdes, David W. Goldstein, Daniel A. Gruen, Daniel Gruendl, Robert A. Gutierrez, Gaston Honscheid, Klaus James, David J. Kuehn, Kyler Kuropatkin, Nikolay Lima, Marcos Lin, Huan Maia, Marcio A. G. Marshall, Jennifer L. Martini, Paul Melchior, Peter Miquel, Ramon Ogando, Ricardo Malagon, Andres Plazas Reil, Kevin Romer, Kathy Sanchez, Eusebio Santiago, Basilio Scarpine, Vic Sevilla-Noarbe, Ignacio Soares-Santos, Marcelle Sobreira, Flavia [UNESP] Suchyta, Eric Tarle, Gregory Thomas, Daniel Tucker, Douglas L. Walker, Alistair R. |
dc.subject.por.fl_str_mv |
gravitational lensing: strong methods: observational methods: statistical quasars: general |
topic |
gravitational lensing: strong methods: observational methods: statistical quasars: general |
description |
We present the discovery and preliminary characterization of a gravitationally lensed quasar with a source redshift z(s) = 2.74 and image separation of 2.9 arcsec lensed by a foreground z(l) = 0.40 elliptical galaxy. Since optical observations of gravitationally lensed quasars showthe lens system as a superposition of multiple point sources and a foreground lensing galaxy, we have developed a morphology-independent multi-wavelength approach to the photometric selection of lensed quasar candidates based on Gaussian Mixture Models (GMM) supervised machine learning. Using this technique and gi multicolour photometric observations from the Dark Energy Survey (DES), near-IR JK photometry from the VISTA Hemisphere Survey (VHS) and WISE mid-IR photometry, we have identified a candidate system with two catalogue components with i(AB) = 18.61 and i(AB) = 20.44 comprising an elliptical galaxy and two blue point sources. Spectroscopic follow-up with NTT and the use of an archival AAT spectrum show that the point sources can be identified as a lensed quasar with an emission line redshift of z = 2.739 +/- 0.003 and a foreground early-type galaxy with z = 0.400 +/- 0.002. We model the system as a single isothermal ellipsoid and find the Einstein radius theta(E) similar to 1.47 arcsec, enclosed mass M-enc similar to 4 x 10(11) M-circle dot and a time delay of similar to 52 d. The relatively wide separation, month scale time delay duration and high redshift make this an ideal system for constraining the expansion rate beyond a redshift of 1. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-03-01 2018-11-26T17:20:09Z 2018-11-26T17:20:09Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1093/mnras/stw2958 Monthly Notices Of The Royal Astronomical Society. Oxford: Oxford Univ Press, v. 465, n. 4, p. 4325-4334, 2017. 0035-8711 http://hdl.handle.net/11449/162526 10.1093/mnras/stw2958 WOS:000395170200041 WOS000395170200041.pdf |
url |
http://dx.doi.org/10.1093/mnras/stw2958 http://hdl.handle.net/11449/162526 |
identifier_str_mv |
Monthly Notices Of The Royal Astronomical Society. Oxford: Oxford Univ Press, v. 465, n. 4, p. 4325-4334, 2017. 0035-8711 10.1093/mnras/stw2958 WOS:000395170200041 WOS000395170200041.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Monthly Notices Of The Royal Astronomical Society 2,346 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
4325-4334 application/pdf |
dc.publisher.none.fl_str_mv |
Oxford Univ Press |
publisher.none.fl_str_mv |
Oxford Univ Press |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965061277548544 |