Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope
Artikel i vetenskaplig tidskrift, 2022
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 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.
Författare
Sara Issaoun
NASA Hubble Fellowship Program
Radboud Universiteit
Harvard-Smithsonian Center for Astrophysics
Maciek Wielgus
Max-Planck-Gesellschaft
Svetlana Jorstad
Boston University
Thomas P. Krichbaum
Max-Planck-Gesellschaft
Lindy Blackburn
Harvard-Smithsonian Center for Astrophysics
Harvard University
Michael Janssen
Max-Planck-Gesellschaft
Chi-kwan Chan
University of Arizona
Dominic W. Pesce
Harvard University
Harvard-Smithsonian Center for Astrophysics
Jose L. Gomez
Instituto de Astrofisica de Andalucía (IAA)
Kazunori Akiyama
Harvard University
National Astronomical Observatory of Japan
Massachusetts Institute of Technology (MIT)
Monika Moscibrodzka
Radboud Universiteit
Ivan Marti-Vidal
Universitat de Valencia
Andrew Chael
Princeton University
NASA Hubble Fellowship Program
Rocco Lico
Max-Planck-Gesellschaft
Istituto nazionale di astrofisica (INAF)
Instituto de Astrofisica de Andalucía (IAA)
Jun Liu
Max-Planck-Gesellschaft
Venkatessh Ramakrishnan
European Southern Observatory (ESO)
Aalto-Yliopisto
Universidad de Concepción
Mikhail Lisakov
Max-Planck-Gesellschaft
Antonio Fuentes
Instituto de Astrofisica de Andalucía (IAA)
Guang-Yao Zhao
Instituto de Astrofisica de Andalucía (IAA)
Kotaro Moriyama
Johann Wolfgang Goethe Universität Frankfurt am Main
Massachusetts Institute of Technology (MIT)
National Astronomical Observatory of Japan
Avery E. Broderick
University of Waterloo
Perimeter Institute for Theoretical Physics
Paul Tiede
Harvard-Smithsonian Center for Astrophysics
Harvard University
Nicholas R. MacDonald
Max-Planck-Gesellschaft
Yosuke Mizuno
Shanghai Jiao Tong University
Johann Wolfgang Goethe Universität Frankfurt am Main
Efthalia Traianou
Instituto de Astrofisica de Andalucía (IAA)
Max-Planck-Gesellschaft
Laurent Loinard
Universidad Nacional Autónoma de México
Jordy Davelaar
Flatiron Institute
Columbia University
Radboud Universiteit
Mark Gurwell
Harvard-Smithsonian Center for Astrophysics
Ru-Sen Lu
Max-Planck-Gesellschaft
Chinese Academy of Sciences
Antxon Alberdi
Instituto de Astrofisica de Andalucía (IAA)
Walter Alef
Max-Planck-Gesellschaft
Juan Carlos Algaba
University of Malaya
Richard Anantua
University of Texas at San Antonio
Harvard University
Harvard-Smithsonian Center for Astrophysics
Keiichi Asada
Academia Sinica
Rebecca Azulay
Universitat de Valencia
Max-Planck-Gesellschaft
Uwe Bach
Max-Planck-Gesellschaft
Anne-Kathrin Baczko
Max-Planck-Gesellschaft
David Ball
University of Arizona
Mislac Balokovic
Yale University
John Barrett
Massachusetts Institute of Technology (MIT)
Michi Baubock
University of Illinois
Bradford A. Benson
University of Chicago
Fermi National Accelerator Laboratory
Dan Bintley
James Clerk Maxwell Telescope
East Asian Observatory
Raymond Blundell
Harvard-Smithsonian Center for Astrophysics
Wilfred Boland
Nederlandse Onderzoekschool voor Astronomie (NOVA)
Katherine L. Bouman
California Institute of Technology (Caltech)
Geoffrey C. Bower
University of Hawaii
Academia Sinica
Hope Boyce
McGill University
Michael Bremer
Institut de Radioastronomie Millimétrique (IRAM)
Christiaan D. Brinkerink
Radboud Universiteit
Roger Brissenden
Harvard-Smithsonian Center for Astrophysics
Harvard University
Silke Britzen
Max-Planck-Gesellschaft
Dominique Broguiere
Institut de Radioastronomie Millimétrique (IRAM)
Thomas Bronzwaer
Radboud Universiteit
Sandra Bustamante
University of Massachusetts
Do-Young Byun
Korea Astronomy and Space Science Institute
University of Science and Technology (UST)
John E. Carlstrom
University of Chicago
Chiara Ceccobello
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Koushik Chatterjee
Harvard University
Harvard-Smithsonian Center for Astrophysics
Shami Chatterjee
Cornell University
Ming-Tang Chen
Academia Sinica
Yongjun Chen
Chinese Academy of Sciences
Ilje Cho
Instituto de Astrofisica de Andalucía (IAA)
Pierre Christian
Fairfield University
Nicholas S. Conroy
University of Illinois
Harvard-Smithsonian Center for Astrophysics
John Conway
Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium
James M. Cordes
Cornell University
Thomas M. Crawford
University of Chicago
Geoffrey B. Crew
Massachusetts Institute of Technology (MIT)
Alejandro Cruz-Osorio
Johann Wolfgang Goethe Universität Frankfurt am Main
Yuzhu Cui
National Astronomical Observatory of Japan
The Graduate University for Advanced Studies (SOKENDAI)
Mariafelicia De Laurentis
Universita degli Studi di Napoli Federico II
Johann Wolfgang Goethe Universität Frankfurt am Main
Istituto Nazionale di Fisica Nucleare
Roger Deane
Rhodes University
Universiteit van Pretoria
University of Witwatersrand
Jessica Dempsey
East Asian Observatory
James Clerk Maxwell Telescope
Netherlands Institute for Radio Astronomy (ASTRON)
Gregory Desvignes
Université Paris Descartes
Jason Dexter
University of Colorado at Boulder
Sheperd S. Doeleman
Harvard University
Harvard-Smithsonian Center for Astrophysics
Vedant Dhruv
University of Illinois
Sergio Abraham Dzib Quijano
Institut de Radioastronomie Millimétrique (IRAM)
Max-Planck-Gesellschaft
Ralph P. Eatough
Max-Planck-Gesellschaft
Chinese Academy of Sciences
Razieh Emami
Harvard-Smithsonian Center for Astrophysics
Heino Falcke
Radboud Universiteit
Joseph Farah
University of California at Santa Barbara
Las Cumbres Observatory Global Telescope Network
Vincent L. Fish
Massachusetts Institute of Technology (MIT)
Ed Fomalont
National Radio Astronomy Observatory
H. Alyson Ford
University of Arizona
Raquel Fraga-Encinas
Radboud Universiteit
William T. Freeman
Google Inc.
Massachusetts Institute of Technology (MIT)
Per Friberg
James Clerk Maxwell Telescope
East Asian Observatory
Christian M. Fromm
Julius-Maximilians Universität Würzburg
Max-Planck-Gesellschaft
Johann Wolfgang Goethe Universität Frankfurt am Main
Peter Galison
Harvard University
Charles F. Gammie
University of Illinois
Roberto Garcia
Institut de Radioastronomie Millimétrique (IRAM)
Olivier Gentaz
Institut de Radioastronomie Millimétrique (IRAM)
Boris Georgiev
University of Waterloo
Perimeter Institute for Theoretical Physics
Ciriaco Goddi
Universita degli Studi di Cagliari
Istituto nazionale di astrofisica (INAF)
Roman Gold
Johann Wolfgang Goethe Universität Frankfurt am Main
Syddansk Universitet
Gomez-Ruiz
Instituto Nacional de Astrofísica, Óptica y Electrońica
Consejo Nacional de Ciencia y Tecnologia Mexico
Minfeng Gu
Chinese Academy of Sciences
Kazuhiro Hada
National Astronomical Observatory of Japan
The Graduate University for Advanced Studies (SOKENDAI)
Daryl Haggard
McGill University
Michael H. Hecht
Massachusetts Institute of Technology (MIT)
Ronald Hesper
Rijksuniversiteit Groningen
Luis C. Ho
Beijing University of Technology
Paul Ho
Academia Sinica
James Clerk Maxwell Telescope
Mareki Honma
University of Tokyo
National Astronomical Observatory of Japan
The Graduate University for Advanced Studies (SOKENDAI)
Chih-Wei L. Huang
Academia Sinica
Lei Huang
Chinese Academy of Sciences
David H. Hughes
Instituto Nacional de Astrofísica, Óptica y Electrońica
Shiro Ikeda
The Institute of Statistical Mathematics
University of Tokyo
National Astronomical Observatory of Japan
The Graduate University for Advanced Studies (SOKENDAI)
C. M. Violette Impellizzeri
National Radio Astronomy Observatory
Universiteit Leiden
Makoto Inoue
Academia Sinica
David J. James
ASTRAVEO
Buell T. Jannuzi
University of Arizona
Britton Jeter
Academia Sinica
Wu Jiang
Chinese Academy of Sciences
Alejandra Jimenez-Rosales
Radboud Universiteit
Michael D. Johnson
Harvard University
Harvard-Smithsonian Center for Astrophysics
Joshi
University of Illinois
Taehyun Jung
Korea Astronomy and Space Science Institute
University of Science and Technology (UST)
Mansour Karami
University of Waterloo
Perimeter Institute for Theoretical Physics
Ramesh Karuppusamy
Max-Planck-Gesellschaft
Tomohisa Kawashima
University of Tokyo
Garrett K. Keating
Harvard-Smithsonian Center for Astrophysics
Mark Kettenis
Joint Institute for VLBI in Europe (JIVE)
Dong-Jin Kim
Max-Planck-Gesellschaft
Jae-Young Kim
James Clerk Maxwell Telescope
Korea Astronomy and Space Science Institute
Max-Planck-Gesellschaft
East Asian Observatory
Jongsoo Kim
Korea Astronomy and Space Science Institute
Junhan Kim
California Institute of Technology (Caltech)
University of Arizona
Motoki Kino
National Astronomical Observatory of Japan
Kogakuin University of Technology and Engineering
Jun Yi Koay
Academia Sinica
Prashant Kocherlakota
Johann Wolfgang Goethe Universität Frankfurt am Main
Yutaro Kofuji
University of Tokyo
National Astronomical Observatory of Japan
Patrick M. Koch
Academia Sinica
Shoko Koyama
Academia Sinica
Niigata University
Carsten Kramer
Institut de Radioastronomie Millimétrique (IRAM)
Michael Kramer
Max-Planck-Gesellschaft
Cheng-Yu Kuo
Academia Sinica
National Sun Yat-Sen University
Noemi La Bella
Radboud Universiteit
Tod R. Lauer
National Optical Astronomy Observatory
Daeyoung Lee
University of Illinois
Sang-Sung Lee
Korea Astronomy and Space Science Institute
Po Kin Leung
Chinese University of Hong Kong
Aviad Levis
California Institute of Technology (Caltech)
Zhiyuan Li
Nanjing University
Greg Lindahl
Harvard-Smithsonian Center for Astrophysics
Michael Lindqvist
Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium
Kuo Liu
Max-Planck-Gesellschaft
Elisabetta Liuzzo
Istituto nazionale di astrofisica (INAF)
Wen-Ping Lo
National Taiwan University
Academia Sinica
Andrei P. Lobanov
Max-Planck-Gesellschaft
Colin Lonsdale
Massachusetts Institute of Technology (MIT)
Jirong Mao
Chinese Academy of Sciences
James Clerk Maxwell Telescope
East Asian Observatory
Nicola Marchili
Max-Planck-Gesellschaft
Istituto nazionale di astrofisica (INAF)
Sera Markoff
Universiteit Van Amsterdam
Daniel P. Marrone
University of Arizona
Alan P. Marscher
Boston University
Satoki Matsushita
Academia Sinica
Lynn D. Matthews
Massachusetts Institute of Technology (MIT)
Lia Medeiros
University of Arizona
Institute for Advanced Study
Karl M. Menten
Max-Planck-Gesellschaft
Daniel Michalik
University of Chicago
European Space Research and Technology Centre (ESA ESTEC)
Izumi Mizuno
James Clerk Maxwell Telescope
East Asian Observatory
James M. Moran
Harvard-Smithsonian Center for Astrophysics
Harvard University
Cornelia Mueller
Radboud Universiteit
Max-Planck-Gesellschaft
Alejandro Mus
Universitat de Valencia
Gibwa Musoke
Universiteit Van Amsterdam
Radboud Universiteit
Ioannis Myserlis
Instituto de Radioastronomía Milimétrica
Andrew Nadolski
University of Illinois
Hiroshi Nagai
The Graduate University for Advanced Studies (SOKENDAI)
National Astronomical Observatory of Japan
Neil M. Nagar
Universidad de Concepción
Masanori Nakamura
Academia Sinica
National Institute of Technology, Hachinohe College
Ramesh Narayan
Harvard University
Harvard-Smithsonian Center for Astrophysics
Gopal Narayanan
University of Massachusetts
Iniyan Natarajan
South African Radio Astronomy Observatory (SARAO)
Istituto Nazionale di Fisica Nucleare
Antonios Nathanail
National and Kapodistrian University of Athens
Johann Wolfgang Goethe Universität Frankfurt am Main
Joey Neilsen
Villanova University
Roberto Neri
Institut de Radioastronomie Millimétrique (IRAM)
Chunchong Ni
University of Waterloo
Perimeter Institute for Theoretical Physics
Aristeidis Noutsos
Max-Planck-Gesellschaft
Michael A. Nowak
Washington University in St. Louis
Junghwan Oh
Sejong University
Hiroki Okino
National Astronomical Observatory of Japan
University of Tokyo
Hector Olivares
Radboud Universiteit
Gisela N. Ortiz-Leon
Max-Planck-Gesellschaft
Tomoaki Oyama
National Astronomical Observatory of Japan
Feryal Ozel
University of Arizona
Daniel C. M. Palumbo
Harvard-Smithsonian Center for Astrophysics
Harvard University
Georgios Filippos Paraschos
Max-Planck-Gesellschaft
Jongho Park
Academia Sinica
Harriet Parsons
East Asian Observatory
James Clerk Maxwell Telescope
Nimesh Patel
Harvard-Smithsonian Center for Astrophysics
Ue-Li Pen
Perimeter Institute for Theoretical Physics
Canadian Institute for Advanced Research
University of Toronto
Academia Sinica
Vincent Pietu
Institut de Radioastronomie Millimétrique (IRAM)
Richard Plambeck
University of California at Berkeley
Aleksandar PopStefanija
University of Massachusetts
Oliver Porth
Universiteit Van Amsterdam
Johann Wolfgang Goethe Universität Frankfurt am Main
Felix M. Potzl
Max-Planck-Gesellschaft
University College Cork
Ben Prather
University of Illinois
Jorge A. Preciado-Lopez
Perimeter Institute for Theoretical Physics
Dimitrios Psaltis
University of Arizona
Hung-Yi Pu
Academia Sinica
National Taiwan Normal University
Ramprasad Rao
Academia Sinica
Mark G. Rawlings
NSF's National Optical-Infrared Astronomy Research Laboratory (NOIRLab)
James Clerk Maxwell Telescope
East Asian Observatory
Alexander W. Raymond
Harvard-Smithsonian Center for Astrophysics
Harvard University
Luciano Rezzolla
Trinity College Dublin
Frankfurt Institute for Advanced Studies
Johann Wolfgang Goethe Universität Frankfurt am Main
Angelo Ricarte
Harvard-Smithsonian Center for Astrophysics
Harvard University
Bart Ripperda
Flatiron Institute
Princeton University
Freek Roelofs
Radboud Universiteit
Harvard-Smithsonian Center for Astrophysics
Harvard University
Alan Rogers
Massachusetts Institute of Technology (MIT)
Eduardo Ros
Max-Planck-Gesellschaft
Cristina Romero-Canizales
Academia Sinica
Arash Roshanineshat
University of Arizona
Helge Rottmann
Max-Planck-Gesellschaft
Alan L. Roy
Max-Planck-Gesellschaft
Ignacio Ruiz
Instituto de Radioastronomía Milimétrica
Chet Ruszczyk
Massachusetts Institute of Technology (MIT)
Kazi L. J. Rygl
Istituto nazionale di astrofisica (INAF)
Salvador Sanchez
Instituto de Radioastronomía Milimétrica
David Sanchez-Arguelles
Instituto Nacional de Astrofísica, Óptica y Electrońica
Consejo Nacional de Ciencia y Tecnologia Mexico
Miguel Sanchez-Portal
Instituto de Radioastronomía Milimétrica
Mahito Sasada
National Astronomical Observatory of Japan
Hiroshima University
Kaushik Satapathy
University of Arizona
Tuomas Savolainen
Aalto-Yliopisto
Max-Planck-Gesellschaft
F. Peter Schloerb
University of Massachusetts
Karl-Friedrich Schuster
Institut de Radioastronomie Millimétrique (IRAM)
Lijing Shao
Max-Planck-Gesellschaft
Beijing University of Technology
Zhiqiang Shen
Chinese Academy of Sciences
East Asian Observatory
James Clerk Maxwell Telescope
Des Small
Joint Institute for VLBI in Europe (JIVE)
Bong Won Sohn
James Clerk Maxwell Telescope
University of Science and Technology (UST)
East Asian Observatory
Yonsei University
Korea Astronomy and Space Science Institute
Jason SooHoo
Massachusetts Institute of Technology (MIT)
Kamal Souccar
University of Massachusetts
He Sun
California Institute of Technology (Caltech)
Fumie Tazaki
National Astronomical Observatory of Japan
Alexandra J. Tetarenko
NASA Hubble Fellowship Program
Texas Tech University at Lubbock
Remo P. J. Tilanus
Radboud Universiteit
University of Arizona
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
Universiteit Leiden
Michael Titus
Massachusetts Institute of Technology (MIT)
Pablo Torne
Max-Planck-Gesellschaft
Instituto de Radioastronomía Milimétrica
Tyler Trent
University of Arizona
Sascha Trippe
East Asian Observatory
James Clerk Maxwell Telescope
Seoul National University
Ilse van Bemmel
Joint Institute for VLBI in Europe (JIVE)
Huib Jan van Langevelde
Universiteit Leiden
University of New Mexico
Joint Institute for VLBI in Europe (JIVE)
Daniel R. van Rossum
Radboud Universiteit
Jesse Vos
Radboud Universiteit
Jan Wagner
Max-Planck-Gesellschaft
Derek Ward-Thompson
University of Central Lancashire
John Wardle
Brandeis University
Jonathan Weintroub
Harvard-Smithsonian Center for Astrophysics
Harvard University
Norbert Wex
Max-Planck-Gesellschaft
Robert Wharton
Max-Planck-Gesellschaft
Kaj Wiik
Turun Yliopisto
Gunther Witzel
Max-Planck-Gesellschaft
Michael Wondrak
Radboud Universiteit
George N. Wong
Institute for Advanced Study
Princeton University
Qingwen Wu
Huazhong University of Science and Technology
James Clerk Maxwell Telescope
East Asian Observatory
Paul Yamaguchi
Harvard-Smithsonian Center for Astrophysics
Doosoo Yoon
Universiteit Van Amsterdam
Andre Young
Radboud Universiteit
Ken Young
Harvard-Smithsonian Center for Astrophysics
Ziri Younsi
University College London (UCL)
Johann Wolfgang Goethe Universität Frankfurt am Main
Feng Yuan
Chinese Academy of Sciences
James Clerk Maxwell Telescope
East Asian Observatory
Ye-Fei Yuan
University of Science and Technology of China
James Clerk Maxwell Telescope
East Asian Observatory
J. Anton Zensus
Max-Planck-Gesellschaft
Shuo Zhang
Bard College
Shan-Shan Zhao
Chinese Academy of Sciences
Astrophysical Journal
0004-637X (ISSN) 1538-4357 (eISSN)
Vol. 934 2 145Ämneskategorier
Meteorologi och atmosfärforskning
Astronomi, astrofysik och kosmologi
Fusion, plasma och rymdfysik
DOI
10.3847/1538-4357/ac7a40