Resolving the Inner Parsec of the Blazar J1924–2914 with the Event Horizon Telescope
Sara IssaounNASA Hubble Fellowship Program, Einstein FellowMaciek WielgusMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanySvetlana G. JorstadInstitute for Astrophysical Research, Boston University, 725 Commonwealth Ave., Boston, MA 02215, USAT. P. KrichbaumMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyLindy BlackburnBlack Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USAMichaël JanssenMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyChi‐kwan ChanSteward Observatory and Department of Astronomy, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USAD. W. PesceCenter for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAJosé L. GómezInstituto de Astrofísica de Andalucía-CíSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainKazunori AkiyamaBlack Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USAMonika MościbrodzkaDepartment of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, P.O. Box 9010, 6500 GL Nijmegen, The NetherlandsI. Martí‐VidalDepartament d'Astronomia i Astrofísica, Universitat de València, C. Dr. Moliner 50, E-46100 Burjassot, València, SpainAndrew ChaelNASA Hubble Fellowship Program, Einstein FellowRocco LicoMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyM. KrämerMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyVenkatessh RamakrishnanFinnish Centre for Astronomy with ESO, FI-20014 University of Turku, FinlandMikhail LisakovMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyAntonio FuentesInstituto de Astrofísica de Andalucía-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainGuang-Yao ZhaoInstituto de Astrofísica de Andalucía-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainKotaro MoriyamaMassachusetts Institute of Technology Haystack Observatory, 99 Millstone Road, Westford, MA 01886, USAAvery E. BroderickDepartment of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, CanadaPaul TiedeBlack Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USANicholas R. MacDonaldMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyYosuke MizunoSchool of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic Of ChinaEfthalia TraianouInstituto de Astrofísica de Andalucía-CíSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainLaurent LoinardInstituto de Astronomía, Universidad Nacional Autónoma de México, CdMx 04510, MéxicoJordy DavelaarCenter for Computational Astrophysics, Flatiron Institute, 162 Fifth Avenue, New York, NY 10010, USAMark GurwellCenter for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USARu-Sen LuKey Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China; Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany; Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic of ChinaA. AlberdiInstituto de Astrofísica de Andalucía-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainW. AlefMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyJuan Carlos AlgabaDepartment of Physics, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, MalaysiaRichard AnantuaBlack Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USAKeiichi AsadaInstitute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, AS/NTU No. 1, Sec. 4, Roosevelt Rd, Taipei 10617, Taiwan, R.O.CRebecca AzulayObservatori Astronòmic, Universitat de València, C. Catedrático José Beltrán 2, E-46980 Paterna, València, SpainU. BachMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyAnne-Kathrin BaczkoMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyDavid BallSteward Observatory and Department of Astronomy, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USAMislav BalokovićYale Center for Astronomy & Astrophysics, Yale University, 52 Hillhouse Avenue, New Haven, CT 06511, USAJ. BarrettMassachusetts Institute of Technology Haystack Observatory, 99 Millstone Road, Westford, MA 01886, USAMichi BauböckDepartment of Physics, University of Illinois, 1110 West Green Street, Urbana, IL 61801, USAB. A. BensonDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USADan BintleyEast Asian Observatory, 660 N. A'ohoku Place, Hilo, HI 96720, USAR. BlundellCenter for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAW. BolandNederlandse Onderzoekschool voor Astronomie (NOVA), P.O. Box 9513, 2300 RA Leiden, The NetherlandsKatherine L. BoumanCalifornia Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USAGeoffrey C. BowerDepartment of Physics and Astronomy, University of Hawaii at Manoa, 2505 Correa Road, Honolulu, HI 96822, USAHope BoyceMcGill Space Institute, McGill University, 3550 rue University, Montréal, QC H3A 2A7, CanadaMichael BremerInstitut de Radioastronomie Millimétrique, 300 rue de la Piscine, F-38406 Saint Martin d'Héres, FranceChristiaan D. BrinkerinkDepartment of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, P.O. Box 9010, 6500 GL Nijmegen, The NetherlandsRoger BrissendenCenter for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAS. BritzenMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyDominique BroguièreInstitut de Radioastronomie Millimétrique, 300 rue de la Piscine, F-38406 Saint Martin d'Héres, FranceThomas BronzwaerDepartment of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, P.O. Box 9010, 6500 GL Nijmegen, The NetherlandsSandra BustamanteDepartment of Astronomy, University of Massachusetts, 01003, Amherst, MA, USADo‐Young ByunKorea Astronomy and Space Science Institute, Daedeok-daero 776, Yuseong-gu, Daejeon 34055, Republic of KoreaJ. E. CarlstromEnrico Fermi Institute, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAChiara CeccobelloDepartment of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-43992 Onsala, SwedenKoushik ChatterjeeBlack Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USAShami ChatterjeeCornell Center for Astrophysics and Planetary Science, Cornell University, Ithaca, NY 14853, USAMing‐Tang ChenYongjun ChenKey Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China; Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic of ChinaIlje ChoInstituto de Astrofísica de Andalucía-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainPierre ChristianPhysics Department, Fairfield University, 1073 North Benson Road, Fairfield, CT 06824, USANicholas S. ConroyDepartment of Astronomy, University of Illinois at Urbana-Champaign, 1002 West Green Street, Urbana, IL 61801, USAJ. E. ConwayDepartment of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-43992 Onsala, SwedenJ. M. CordesCornell Center for Astrophysics and Planetary Science, Cornell University, Ithaca, NY 14853, USAT. M. CrawfordDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAG. CrewMassachusetts Institute of Technology Haystack Observatory, 99 Millstone Road, Westford, MA 01886, USAAlejandro Cruz-OsorioInstitut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, D-60438 Frankfurt am Main, GermanyYuzhu CuiDepartment of Astronomical Science, The Graduate University for Advanced Studies (SOKENDAI), 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanMariafelicia De LaurentisDipartimento di Fisica "E. Pancini", Universitá di Napoli "Federico II", Compl. Univ. di Monte S. Angelo, Edificio G, Via Cinthia, I-80126, Napoli, ItalyRoger DeaneWits Centre for Astrophysics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg 2050, South AfricaJessica DempseyJames Clerk Maxwell Telescope (JCMT), 660 N. A'ohoku Place, Hilo, HI 96720, USAG. DesvignesLESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, 5 place Jules Janssen, F-92195 Meudon, FranceJason DexterJILA and Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309, USASheperd S. DoelemanBlack Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USAVedant DhruvDepartment of Physics, University of Illinois, 1110 West Green Street, Urbana, IL 61801, USASergio A. DzibInstitut de Radioastronomie Millimétrique, 300 rue de la Piscine, F-38406 Saint Martin d'Héres, FranceRalph P. EatoughMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyRazieh EmamiCenter for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAH. FalckeDepartment of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, P.O. Box 9010, 6500 GL Nijmegen, The NetherlandsJoseph FarahLas Cumbres Observatory, 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USAVincent L. FishMassachusetts Institute of Technology Haystack Observatory, 99 Millstone Road, Westford, MA 01886, USAEd FomalontNational Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USAH. Alyson FordSteward Observatory and Department of Astronomy, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USARaquel Fraga-EncinasDepartment of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, P.O. Box 9010, 6500 GL Nijmegen, The NetherlandsWilliam T. FreemanDepartment of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 32-D476, 77 Massachusetts Ave., Cambridge, MA 02142, USAPer FribergJames Clerk Maxwell Telescope (JCMT), 660 N. A'ohoku Place, Hilo, HI 96720, USAChristian M. FrommInstitut für Theoretische Physik und Astrophysik, Universität Würzburg, Emil-Fischer-Str. 31, D-97074 Würzburg, GermanyPeter GalisonDepartment of Physics, Harvard University, Cambridge, MA 02138, USACharles F. GammieDepartment of Physics, University of Illinois, 1110 West Green Street, Urbana, IL 61801, USARoberto GarcíaInstitut de Radioastronomie Millimétrique, 300 rue de la Piscine, F-38406 Saint Martin d'Héres, FranceOlivier GentazInstitut de Radioastronomie Millimétrique, 300 rue de la Piscine, F-38406 Saint Martin d'Héres, FranceBoris GeorgievPerimeter Institute for Theoretical Physics, 31 Caroline Street North, Waterloo, ON, N2L 2Y5, CanadaC. GoddiDipartimento di Fisica, Università degli Studi di Cagliari, SP Monserrato-Sestu km 0.7, I-09042 Monserrato, ItalyRoman GoldCP3-Origins, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, DenmarkArturo I. Gómez-RuizConsejo Nacional de Ciencia y Tecnologìa, Av. Insurgentes Sur 1582, 03940, Ciudad de México, MéxicoMinfeng GuKey Laboratory for Research in Galaxies and Cosmology, Chinese Academy of Sciences, Shanghai 200030, People's Republic of ChinaKazuhiro HadaMizusawa VLBI Observatory, National Astronomical Observatory of Japan, 2-12 Hoshigaoka, Mizusawa, Oshu, Iwate 023-0861, Japan
2022en
ABI
Аннотация
Abstract The 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 μ 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° 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.
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