Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope

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dc.contributor.authorIssaoun Sara
dc.contributor.authorWielgus Maciek
dc.contributor.authorJorstad Svetlana
dc.contributor.authorKrichbaum Thomas P.
dc.contributor.authorBlackburn Lindy
dc.contributor.authorJanssen Michael
dc.contributor.authorChan Chi-kwan
dc.contributor.authorPesce Dominic W.
dc.contributor.authorGómez José L.
dc.contributor.authorAkiyama Kazunori
dc.contributor.authorMościbrodzka Monika
dc.contributor.authorMartí-Vidal Iván
dc.contributor.authorChael Andrew
dc.contributor.authorLico Rocco
dc.contributor.authorLiu Jun
dc.contributor.authorRamakrishnan Venkatessh
dc.contributor.authorLisakov Mikhail
dc.contributor.authorFuentes Antonio
dc.contributor.authorZhao Guang-Yao
dc.contributor.authorMoriyama Kotaro
dc.contributor.authorBroderick Avery E.
dc.contributor.authorTiede Paul
dc.contributor.authorMacDonald Nicholas R.
dc.contributor.authorMizuno Yosuke
dc.contributor.authorTraianou Efthalia
dc.contributor.authorLoinard Laurent
dc.contributor.authorDavelaar Jordy
dc.contributor.authorGurwell Mark
dc.contributor.authorLu Ru-Sen
dc.contributor.authorAlberdi Antxon
dc.contributor.authorAlef Walter
dc.contributor.authorAlgaba Juan Carlos
dc.contributor.authorAnantua Richard
dc.contributor.authorAsada Keiichi
dc.contributor.authorAzulay Rebecca
dc.contributor.authorBach Uwe
dc.contributor.authorBaczko Anne-Kathrin
dc.contributor.authorBall David
dc.contributor.authorBaloković Mislav
dc.contributor.authorBarrett John
dc.contributor.authorBauböck Michi
dc.contributor.authorBenson Bradford A.
dc.contributor.authorBintley Dan
dc.contributor.authorBlundell Raymond
dc.contributor.authorBoland Wilfred
dc.contributor.authorBouman Katherine L.
dc.contributor.authorBower Geoffrey C.
dc.contributor.authorBoyce Hope
dc.contributor.authorBremer Michael
dc.contributor.authorBrinkerink Christiaan D.
dc.contributor.authorBrissenden Roger
dc.contributor.authorBritzen Silke
dc.contributor.authorBroguiere Dominique
dc.contributor.authorBronzwaer Thomas
dc.contributor.authorBustamante Sandra
dc.contributor.authorByun Do-Young
dc.contributor.authorCarlstrom John E.
dc.contributor.authorCeccobello Chiara
dc.contributor.authorChatterjee Koushik
dc.contributor.authorChatterjee Shami
dc.contributor.authorChen Ming-Tang
dc.contributor.authorChen Yongjun
dc.contributor.authorCho Ilje
dc.contributor.authorChristian Pierre
dc.contributor.authorConroy Nicholas S.
dc.contributor.authorConway John E.
dc.contributor.authorCordes James M.
dc.contributor.authorCrawford Thomas M.
dc.contributor.authorCrew Geoffrey B.
dc.contributor.authorCruz-Osorio Alejandro
dc.contributor.authorCui Yuzhu
dc.contributor.authorDe Laurentis Mariafelicia
dc.contributor.authorDeane Roger
dc.contributor.authorDempsey Jessica
dc.contributor.authorDesvignes Gregory
dc.contributor.authorDexter Jason
dc.contributor.authorDoeleman Sheperd S.
dc.contributor.authorDhruv Vedant
dc.contributor.authorQuijano Sergio Abraham Dzib
dc.contributor.authorEatough Ralph P.
dc.contributor.authorEmami Razieh
dc.contributor.authorFalcke Heino
dc.contributor.authorFarah Joseph
dc.contributor.authorFish Vincent L.
dc.contributor.authorFomalont Ed
dc.contributor.authorFord H. Alyson
dc.contributor.authorFraga-Encinas Raquel
dc.contributor.authorFreeman William T.
dc.contributor.authorFriberg Per
dc.contributor.authorFromm Christian M.
dc.contributor.authorGalison Peter
dc.contributor.authorGammie Charles F.
dc.contributor.authorGarcía Roberto
dc.contributor.authorGentaz Olivier
dc.contributor.authorGeorgiev Boris
dc.contributor.authorGoddi Ciriaco
dc.contributor.authorGold Roman
dc.contributor.authorGómez-Ruiz Arturo I.
dc.contributor.authorGu Minfeng
dc.contributor.authorHada Kazuhiro
dc.contributor.authorHaggard Daryl
dc.contributor.authorHecht Michael H.
dc.contributor.authorHesper Ronald
dc.contributor.authorHo Luis C.
dc.contributor.authorHo Paul
dc.contributor.authorHonma Mareki
dc.contributor.authorHuang Chih-Wei L.
dc.contributor.authorHuang Lei
dc.contributor.authorHughes David H.
dc.contributor.authorIkeda Shiro
dc.contributor.authorImpellizzeri C. M. Violette
dc.contributor.authorInoue Makoto
dc.contributor.authorJames David J.
dc.contributor.authorJannuzi Buell T.
dc.contributor.authorJeter Britton
dc.contributor.authorJiang Wu
dc.contributor.authorJimenez-Rosales Alejandra
dc.contributor.authorJohnson Michael D.
dc.contributor.authorJoshi Abhishek V.
dc.contributor.authorJung Taehyun
dc.contributor.authorKarami Mansour
dc.contributor.authorKaruppusamy Ramesh
dc.contributor.authorKawashima Tomohisa
dc.contributor.authorKeating Garrett K.
dc.contributor.authorKettenis Mark
dc.contributor.authorKim Dong-Jin
dc.contributor.authorKim Jae-Young
dc.contributor.authorKim Jongsoo
dc.contributor.authorKim Junhan
dc.contributor.authorKino Motoki
dc.contributor.authorKoay Jun Yi
dc.contributor.authorKocherlakota Prashant
dc.contributor.authorKofuji Yutaro
dc.contributor.authorKoch Patrick M.
dc.contributor.authorKoyama Shoko
dc.contributor.authorKramer Carsten
dc.contributor.authorKramer Michael
dc.contributor.authorKuo Cheng-Yu
dc.contributor.authorLa Bella Noemi
dc.contributor.authorLauer Tod R.
dc.contributor.authorLee Daeyoung
dc.contributor.authorLee Sang-Sung
dc.contributor.authorLeung Po Kin
dc.contributor.authorLevis Aviad
dc.contributor.authorLi Zhiyuan
dc.contributor.authorLico Rocco
dc.contributor.authorLindahl Greg
dc.contributor.authorLindqvist Michael
dc.contributor.authorLiu Kuo
dc.contributor.authorLiuzzo Elisabetta
dc.contributor.authorLo Wen-Ping
dc.contributor.authorLobanov Andrei P.
dc.contributor.authorLonsdale Colin
dc.contributor.authorMao Jirong
dc.contributor.authorMarchili Nicola
dc.contributor.authorMarkoff Sera
dc.contributor.authorMarrone Daniel P.
dc.contributor.authorMarscher Alan P.
dc.contributor.authorMatsushita Satoki
dc.contributor.authorMatthews Lynn D.
dc.contributor.authorMedeiros Lia
dc.contributor.authorMenten Karl M.
dc.contributor.authorMichalik Daniel
dc.contributor.authorMizuno Izumi
dc.contributor.authorMizuno Yosuke
dc.contributor.authorMoran James M.
dc.contributor.authorMüller Cornelia
dc.contributor.authorMus Alejandro
dc.contributor.authorMusoke Gibwa
dc.contributor.authorMyserlis Ioannis
dc.contributor.authorNadolski Andrew
dc.contributor.authorNagai Hiroshi
dc.contributor.authorNagar Neil M.
dc.contributor.authorNakamura Masanori
dc.contributor.authorNarayan Ramesh
dc.contributor.authorNarayanan Gopal
dc.contributor.authorNatarajan Iniyan
dc.contributor.authorNathanail Antonios
dc.contributor.authorNeilsen Joey
dc.contributor.authorNeri Roberto
dc.contributor.authorNi Chunchong
dc.contributor.authorNoutsos Aristeidis
dc.contributor.authorNowak Michael A.
dc.contributor.authorOh Junghwan
dc.contributor.authorOkino Hiroki
dc.contributor.authorOlivares Héctor
dc.contributor.authorOrtiz-León Gisela N.
dc.contributor.authorOyama Tomoaki
dc.contributor.authorÖzel Feryal
dc.contributor.authorPalumbo Daniel C. M.
dc.contributor.authorParaschos Georgios Filippos
dc.contributor.authorPark Jongho
dc.contributor.authorParsons Harriet
dc.contributor.authorPatel Nimesh
dc.contributor.authorPen Ue-Li
dc.contributor.authorPiétu Vincent
dc.contributor.authorPlambeck Richard
dc.contributor.authorPopStefanija Aleksandar
dc.contributor.authorPorth Oliver
dc.contributor.authorPötzl Felix M.
dc.contributor.authorPrather Ben
dc.contributor.authorPreciado-López Jorge A.
dc.contributor.authorPsaltis Dimitrios
dc.contributor.authorPu Hung-Yi
dc.contributor.authorRao Ramprasad
dc.contributor.authorRawlings Mark G.
dc.contributor.authorRaymond Alexander W.
dc.contributor.authorRezzolla Luciano
dc.contributor.authorRicarte Angelo
dc.contributor.authorRipperda Bart
dc.contributor.authorRoelofs Freek
dc.contributor.authorRogers Alan
dc.contributor.authorRos Eduardo
dc.contributor.authorRomero-Canizales Cristina
dc.contributor.authorRoshanineshat Arash
dc.contributor.authorRottmann Helge
dc.contributor.authorRoy Alan L.
dc.contributor.authorRuiz Ignacio
dc.contributor.authorRuszczyk Chet
dc.contributor.authorRygl Kazi L. J.
dc.contributor.authorSánchez Salvador
dc.contributor.authorSánchez-Arguelles David
dc.contributor.authorSanchez-Portal Miguel
dc.contributor.authorSasada Mahito
dc.contributor.authorSatapathy Kaushik
dc.contributor.authorSavolainen Tuomas
dc.contributor.authorSchloerb F. Peter
dc.contributor.authorSchuster Karl-Friedrich
dc.contributor.authorShao Lijing
dc.contributor.authorShen Zhiqiang
dc.contributor.authorSmall Des
dc.contributor.authorSohn Bong Won
dc.contributor.authorSooHoo Jason
dc.contributor.authorSouccar Kamal
dc.contributor.authorSun He
dc.contributor.authorTazaki Fumie
dc.contributor.authorTetarenko Alexandra J.
dc.contributor.authorTiede Paul
dc.contributor.authorTilanus Remo P. J.
dc.contributor.authorTitus Michael
dc.contributor.authorTorne Pablo
dc.contributor.authorTrent Tyler
dc.contributor.authorTrippe Sascha
dc.contributor.authorvan Bemmel Ilse
dc.contributor.authorvan Langevelde Huib Jan
dc.contributor.authorvan Rossum Daniel R.
dc.contributor.authorVos Jesse
dc.contributor.authorWagner Jan
dc.contributor.authorWard-Thompson Derek
dc.contributor.authorWardle John
dc.contributor.authorWeintroub Jonathan
dc.contributor.authorWex Norbert
dc.contributor.authorWharton Robert
dc.contributor.authorWiik Kaj
dc.contributor.authorWitzel Gunther
dc.contributor.authorWondrak Michael
dc.contributor.authorWong George N.
dc.contributor.authorWu Qingwen
dc.contributor.authorYamaguchi Paul
dc.contributor.authorYoon Doosoo
dc.contributor.authorYoung André
dc.contributor.authorYoung Ken
dc.contributor.authorYounsi Ziri
dc.contributor.authorYuan Feng
dc.contributor.authorYuan Ye-Fei
dc.contributor.authorZensus J. Anton
dc.contributor.authorZhang Shuo
dc.contributor.authorZhao Shan-Shan
dc.contributor.organizationfi=Suomen ESO-keskus|en=Finnish Centre for Astronomy with ESO|
dc.contributor.organizationfi=Tuorlan observatorio|en=Tuorla Observatory|
dc.contributor.organization-code1.2.246.10.2458963.20.54954054844
dc.contributor.organization-code1.2.246.10.2458963.20.90670098848
dc.converis.publication-id176160989
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/176160989
dc.date.accessioned2025-08-27T20:41:16Z
dc.date.available2025-08-27T20:41:16Z
dc.description.abstractThe blazar J1924-2914 is a primary Event Horizon Telescope (EHT) calibrator for the Galactic center's black hole Sagittarius A*. Here we present the first total and linearly polarized intensity images of this source obtained with the unprecedented 20 mu as resolution of the EHT. J1924-2914 is a very compact flat-spectrum radio source with strong optical variability and polarization. In April 2017 the source was observed quasi-simultaneously with the EHT (April 5-11), the Global Millimeter VLBI Array (April 3), and the Very Long Baseline Array (April 28), giving a novel view of the source at four observing frequencies, 230, 86, 8.7, and 2.3 GHz. These observations probe jet properties from the subparsec to 100 pc scales. We combine the multifrequency images of J1924-2914 to study the source morphology. We find that the jet exhibits a characteristic bending, with a gradual clockwise rotation of the jet projected position angle of about 90 degrees between 2.3 and 230 GHz. Linearly polarized intensity images of J1924-2914 with the extremely fine resolution of the EHT provide evidence for ordered toroidal magnetic fields in the blazar compact core.
dc.identifier.jour-issn0004-637X
dc.identifier.olddbid200012
dc.identifier.oldhandle10024/183039
dc.identifier.urihttps://www.utupub.fi/handle/11111/45468
dc.identifier.urlhttps://iopscience.iop.org/article/10.3847/1538-4357/ac7a40
dc.identifier.urnURN:NBN:fi-fe2022091258412
dc.language.isoen
dc.okm.affiliatedauthorRamakrishnan, Venkatessh
dc.okm.affiliatedauthorWiik, Kaj
dc.okm.discipline115 Astronomy and space scienceen_GB
dc.okm.discipline115 Avaruustieteet ja tähtitiedefi_FI
dc.okm.internationalcopublicationinternational co-publication
dc.okm.internationalityInternational publication
dc.okm.typeA1 ScientificArticle
dc.publisherIOP Publishing Ltd
dc.publisher.countryUnited Kingdomen_GB
dc.publisher.countryBritanniafi_FI
dc.publisher.country-codeGB
dc.relation.articlenumber145
dc.relation.doi10.3847/1538-4357/ac7a40
dc.relation.ispartofjournalAstrophysical Journal
dc.relation.issue2
dc.relation.volume934
dc.source.identifierhttps://www.utupub.fi/handle/10024/183039
dc.titleResolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope
dc.year.issued2022

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