The Event Horizon Telescope Image of the Quasar NRAO 530
Journal article, 2023

We report on the observations of the quasar NRAO 530 with the Event Horizon Telescope (EHT) on 2017 April 5-7, when NRAO 530 was used as a calibrator for the EHT observations of Sagittarius A*. At z = 0.902, this is the most distant object imaged by the EHT so far. We reconstruct the first images of the source at 230 GHz, at an unprecedented angular resolution of similar to 20 mu as, both in total intensity and in linear polarization (LP). We do not detect source variability, allowing us to represent the whole data set with static images. The images reveal a bright feature located on the southern end of the jet, which we associate with the core. The feature is linearly polarized, with a fractional polarization of similar to 5%-8%, and it has a substructure consisting of two components. Their observed brightness temperature suggests that the energy density of the jet is dominated by the magnetic field. The jet extends over 60 mu as along a position angle similar to -28 degrees. It includes two features with orthogonal directions of polarization (electric vector position angle), parallel and perpendicular to the jet axis, consistent with a helical structure of the magnetic field in the jet. The outermost feature has a particularly high degree of LP, suggestive of a nearly uniform magnetic field. Future EHT observations will probe the variability of the jet structure on microarcsecond scales, while simultaneous multiwavelength monitoring will provide insight into the high-energy emission origin.

Author

S.G. Jorstad

Boston University

Maciek Wielgus

Max Planck Society

Rocco Lico

Istituto nazionale di astrofisica (INAF)

Spanish National Research Council (CSIC)

Sara Issaoun

National Aeronautics and Space Administration (NASA)

Harvard-Smithsonian Center for Astrophysics

Avery E. Broderick

University of Waterloo

Perimeter Institute for Theoretical Physics

Dominic W. Pesce

Harvard University

Harvard-Smithsonian Center for Astrophysics

Jun Liu

Max Planck Society

Guang-Yao Zhao

Spanish National Research Council (CSIC)

Thomas P. Krichbaum

Max Planck Society

Lindy Blackburn

Harvard University

Harvard-Smithsonian Center for Astrophysics

Chi-kwan Chan

University of Arizona

Michael Janssen

Max Planck Society

Venkatessh Ramakrishnan

University of Turku

University of Concepcion

Aalto University

Kazunori Akiyama

Massachusetts Institute of Technology (MIT)

National Astronomical Observatory of Japan

Harvard University

Antxon Alberdi

Spanish National Research Council (CSIC)

Juan Carlos Algaba

University of Malaya

Katherine L. Bouman

California Institute of Technology (Caltech)

Ilje Cho

Spanish National Research Council (CSIC)

Antonio Fuentes

Spanish National Research Council (CSIC)

Jose L. Gomez

Spanish National Research Council (CSIC)

Mark Gurwell

Harvard-Smithsonian Center for Astrophysics

Michael D. Johnson

Harvard University

Harvard-Smithsonian Center for Astrophysics

Jae-Young Kim

Kyungpook National University

Max Planck Society

Ru-Sen Lu

Max Planck Society

Chinese Academy of Sciences

Ivan Marti-Vidal

Universitat de Valencia

Monika Moscibrodzka

Radboud University

Felix M. Poetzl

Max Planck Society

Foundation for Research and Technology Hellas (FORTH)

Efthalia Traianou

Spanish National Research Council (CSIC)

Max Planck Society

Ilse van Bemmel

Joint Institute for VLBI in Europe (JIVE)

Walter Alef

Max Planck Society

Richard Anantua

Harvard University

University of Texas at San Antonio

Harvard-Smithsonian Center for Astrophysics

Keiichi Asada

Academia Sinica

Rebecca Azulay

Max Planck Society

Universitat de Valencia

Uwe Bach

Max Planck Society

Anne-Kathrin Baczko

Max Planck Society

David Ball

University of Arizona

Mislav 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

Geoffrey C. Bower

Academia Sinica

University of Hawaii

Hope Boyce

McGill University

Michael Bremer

Institut de Radioastronomie Millimétrique (IRAM)

Christiaan D. Brinkerink

Radboud University

Roger Brissenden

Harvard-Smithsonian Center for Astrophysics

Harvard University

Silke Britzen

Max Planck Society

Dominique Broguiere

Institut de Radioastronomie Millimétrique (IRAM)

Thomas Bronzwaer

Radboud University

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, Space, Earth and Environment, Astronomy and Plasmaphysics

Andrew Chael

Princeton University

Koushik Chatterjee

Harvard University

Harvard-Smithsonian Center for Astrophysics

Shami Chatterjee

Cornell University

Ming-Tang Chen

Academia Sinica

Yongjun Chen

Chinese Academy of Sciences

Xiaopeng Cheng

Korea Astronomy and Space Science Institute

Pierre Christian

Fairfield University

Nicholas S. Conroy

University of Illinois

Harvard-Smithsonian Center for Astrophysics

John Conway

Chalmers, Space, Earth and Environment, Onsala Space Observatory

James M. Cordes

Cornell University

Thomas M. Crawford

University of Chicago

Geoffrey B. Crew

Massachusetts Institute of Technology (MIT)

Alejandro Cruz-Osorio

Goethe University Frankfurt

Yuzhu Cui

Shanghai Jiao Tong University

The Graduate University for Advanced Studies (SOKENDAI)

National Astronomical Observatory of Japan

Jordy Davelaar

Columbia University

Radboud University

Flatiron Institute

Mariafelicia De Laurentis

National Institute for Nuclear Physics

Goethe University Frankfurt

University of Naples Federico II

Roger Deane

University of Pretoria

Rhodes University

University of Witwatersrand

Jessica Dempsey

Netherlands Institute for Radio Astronomy (ASTRON)

James Clerk Maxwell Telescope

East Asian Observatory

Gregory Desvignes

Paris Descartes University

Max Planck Society

Jason Dexter

University of Colorado at Boulder

Vedant Dhruv

University of Illinois

Sheperd S. Doeleman

Harvard University

Harvard-Smithsonian Center for Astrophysics

Sean Dougal

University of Arizona

Sergio A. Dzib

Max Planck Society

Institut de Radioastronomie Millimétrique (IRAM)

Ralph P. Eatough

Max Planck Society

Chinese Academy of Sciences

Razieh Emami

Harvard-Smithsonian Center for Astrophysics

Heino Falcke

Radboud University

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 University

William T. Freeman

Massachusetts Institute of Technology (MIT)

Google Inc.

Per Friberg

James Clerk Maxwell Telescope

East Asian Observatory

Christian M. Fromm

Goethe University Frankfurt

Max Planck Society

University of Würzburg

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

Perimeter Institute for Theoretical Physics

University of Waterloo

C. Goddi

University of Sao Paulo (USP)

National Institute for Nuclear Physics

University of Cagliari

Istituto nazionale di astrofisica (INAF)

R. Gold

University of Southern Denmark

Arturo I. Gomez-Ruiz

National Institute of Astrophysics, Optics and Electronics

National Council for Science and Technology Mexico

Minfeng Gu

Chinese Academy of Sciences

Kazuhiro Hada

The Graduate University for Advanced Studies (SOKENDAI)

National Astronomical Observatory of Japan

Daryl Haggard

McGill University

Kari Haworth

Harvard-Smithsonian Center for Astrophysics

Michael H. Hecht

Massachusetts Institute of Technology (MIT)

Ronald Hesper

University of Groningen

Dirk Heumann

University of Arizona

Luis C. Ho

Beijing University of Technology

Paul Ho

Academia Sinica

James Clerk Maxwell Telescope

East Asian Observatory

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

National Institute of Astrophysics, Optics and Electronics

Shiro Ikeda

The Graduate University for Advanced Studies (SOKENDAI)

The Institute of Statistical Mathematics

University of Tokyo

National Astronomical Observatory of Japan

C. M. Violette Impellizzeri

Leiden University

National Radio Astronomy Observatory

Makoto Inoue

The Graduate University for Advanced Studies (SOKENDAI)

David J. James

ASTRAVEO

Buell T. Jannuzi

University of Arizona

Britton Jeter

Academia Sinica

Wu Jiang

Chinese Academy of Sciences

Alejandra Jimenez-Rosales

Radboud University

Abhishek V. Joshi

University of Illinois

Taehyun Jung

University of Science and Technology (UST)

Korea Astronomy and Space Science Institute

Mansour Karami

Perimeter Institute for Theoretical Physics

University of Waterloo

Ramesh Karuppusamy

Max Planck Society

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 Society

Jongsoo Kim

Korea Astronomy and Space Science Institute

Junhan Kim

California Institute of Technology (Caltech)

Motoki Kino

Kogakuin University of Technology and Engineering

National Astronomical Observatory of Japan

Jun Yi Koay

Academia Sinica

Prashant Kocherlakota

Goethe University Frankfurt

Yutaro Kofuji

University of Tokyo

National Astronomical Observatory of Japan

Shoko Koyama

Academia Sinica

Niigata University

Carsten Kramer

Institut de Radioastronomie Millimétrique (IRAM)

Michael Kramer

Max Planck Society

Cheng-Yu Kuo

National Sun Yat-Sen University

Academia Sinica

Noemi La Bella

Radboud University

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, Space, Earth and Environment, Onsala Space Observatory

Mikhail Lisakov

Max Planck Society

Kuo Liu

Max Planck Society

Elisabetta Liuzzo

Italian ALMA Regional Centre

Istituto nazionale di astrofisica (INAF)

Wen-Ping Lo

Academia Sinica

National Taiwan University

Andrei P. Lobanov

Max Planck Society

Laurent Loinard

Universidad Nacional Autónoma de México

Colin J. Lonsdale

Massachusetts Institute of Technology (MIT)

Nicholas R. MacDonald

Max Planck Society

Jirong Mao

Chinese Academy of Sciences

Nicola Marchili

Italian ALMA Regional Centre

Max Planck Society

Istituto nazionale di astrofisica (INAF)

Sera Markoff

University of 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

National Science Foundation

Karl M. Menten

Max Planck Society

Daniel Michalik

University of Chicago

European Space Research and Technology Centre (ESA ESTEC)

Izumi Mizuno

James Clerk Maxwell Telescope

East Asian Observatory

Yosuke Mizuno

Goethe University Frankfurt

Shanghai Jiao Tong University

James M. Moran

Harvard-Smithsonian Center for Astrophysics

Harvard University

Kotaro Moriyama

Goethe University Frankfurt

National Astronomical Observatory of Japan

Massachusetts Institute of Technology (MIT)

Cornelia Mueller

Radboud University

Max Planck Society

Alejandro Mus

Universitat de Valencia

Gibwa Musoke

University of Amsterdam

Radboud University

I. Myserlis

Institut de Radioastronomie Millimétrique (IRAM)

Andrew Nadolski

University of Illinois

Hiroshi Nagai

The Graduate University for Advanced Studies (SOKENDAI)

National Astronomical Observatory of Japan

Neil M. Nagar

University of Concepcion

Masanori Nakamura

National Institute of Technology, Hachinohe College

Academia Sinica

Ramesh Narayan

Harvard-Smithsonian Center for Astrophysics

Harvard University

Gopal Narayanan

University of Massachusetts

Iniyan Natarajan

South African Radio Astronomy Observatory (SARAO)

University of Witwatersrand

Antonios Nathanail

Goethe University Frankfurt

National and Kapodistrian University of Athens

Santiago Navarro Fuentes

Institut de Radioastronomie Millimétrique (IRAM)

Joseph Neilsen

Villanova University

Roberto Neri

Institut de Radioastronomie Millimétrique (IRAM)

Chunchong Ni

University of Waterloo

Perimeter Institute for Theoretical Physics

Aristeidis Noutsos

Max Planck Society

Michael A. Nowak

Washington University in St. Louis

Junghwan Oh

Sejong University

Hiroki Okino

University of Tokyo

National Astronomical Observatory of Japan

Hector Olivares

Radboud University

Gisela N. Ortiz-Leon

Max Planck Society

Universidad Nacional Autónoma de México

Tomoaki Oyama

National Astronomical Observatory of Japan

Feryal Ozel

University of Arizona

Daniel C. M. Palumbo

Harvard University

Harvard-Smithsonian Center for Astrophysics

Georgios Filippos Paraschos

Max Planck Society

Jongho Park

Academia Sinica

EACOA

Harriet Parsons

James Clerk Maxwell Telescope

East Asian Observatory

Nimesh Patel

Harvard-Smithsonian Center for Astrophysics

U. L. Pen

University of Toronto

Academia Sinica

Canadian Institute for Advanced Research

Perimeter Institute for Theoretical Physics

Vincent Pietu

Institut de Radioastronomie Millimétrique (IRAM)

Richard Plambeck

University of California at Berkeley

Aleksandar PopStefanija

University of Massachusetts

Oliver Porth

University of Amsterdam

Goethe University Frankfurt

Ben Prather

University of Illinois

Jorge A. Preciado-Lopez

Perimeter Institute for Theoretical Physics

Dimitrios Psaltis

University of Arizona

Hung-Yi Pu

National Taiwan Normal University

Academia Sinica

Ramprasad Rao

Harvard-Smithsonian Center for Astrophysics

Mark G. Rawlings

Gemini Observatory North

James Clerk Maxwell Telescope

East Asian Observatory

Alexander W. Raymond

Harvard-Smithsonian Center for Astrophysics

Harvard University

Luciano Rezzolla

Goethe University Frankfurt

Frankfurt Institute for Advanced Studies

Trinity College Dublin

Angelo Ricarte

Harvard University

Harvard-Smithsonian Center for Astrophysics

Bart Ripperda

National Aeronautics and Space Administration (NASA)

Flatiron Institute

Princeton University

Institute for Advanced Study

Freek Roelofs

Radboud University

Harvard-Smithsonian Center for Astrophysics

Harvard University

Alan Rogers

Massachusetts Institute of Technology (MIT)

Eduardo Ros

Max Planck Society

Cristina Romero-Canizales

Academia Sinica

Arash Roshanineshat

University of Arizona

Helge Rottmann

Max Planck Society

Alan L. Roy

Max Planck Society

Ignacio Ruiz

Institut de Radioastronomie Millimétrique (IRAM)

Chet Ruszczyk

Massachusetts Institute of Technology (MIT)

Kazi L. J. Rygl

Italian ALMA Regional Centre

Istituto nazionale di astrofisica (INAF)

Salvador Sanchez

Institut de Radioastronomie Millimétrique (IRAM)

David Sanchez-Arguelles

National Institute of Astrophysics, Optics and Electronics

National Council for Science and Technology Mexico

Miguel Sanchez-Portal

Institut de Radioastronomie Millimétrique (IRAM)

Mahito Sasada

Tokyo Institute of Technology

Hiroshima University

Goethe University Frankfurt

Kaushik Satapathy

University of Arizona

T. Savolainen

Aalto University

Max Planck Society

F. Peter Schloerb

University of Massachusetts

Jonathan Schonfeld

Harvard-Smithsonian Center for Astrophysics

Karl-Friedrich Schuster

Institut de Radioastronomie Millimétrique (IRAM)

Lijing Shao

Max Planck Society

Beijing University of Technology

Zhiqiang Shen

Chinese Academy of Sciences

Des Small

Joint Institute for VLBI in Europe (JIVE)

Bong Won Sohn

Yonsei University

University of Science and Technology (UST)

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

Texas Tech University at Lubbock

National Aeronautics and Space Administration (NASA)

Paul Tiede

Harvard-Smithsonian Center for Astrophysics

Harvard University

Remo P. J. Tilanus

Radboud University

University of Arizona

ASTRAVEO

Netherlands Organisation for Scientific Research (NWO)

Michael Titus

Massachusetts Institute of Technology (MIT)

Pablo Torne

Max Planck Society

Institut de Radioastronomie Millimétrique (IRAM)

Tyler Trent

University of Arizona

Sascha Trippe

Seoul National University

Matthew Turk

University of Illinois

Huib Jan van Langevelde

University of New Mexico

Joint Institute for VLBI in Europe (JIVE)

Leiden University

Daniel R. van Rossum

Radboud University

Jesse Vos

Radboud University

Jan Wagner

Max Planck Society

Derek Ward-Thompson

University of Central Lancashire

John Wardle

Brandeis University

Jonathan Weintroub

Harvard University

Harvard-Smithsonian Center for Astrophysics

Norbert Wex

Max Planck Society

Robert Wharton

Max Planck Society

Kaj Wiik

University of Turku

Gunther Witzel

Max Planck Society

Michael F. Wondrak

Radboud University

George N. Wong

Princeton University

Institute for Advanced Study

Qingwen Wu

Huazhong University of Science and Technology

Paul Yamaguchi

Harvard-Smithsonian Center for Astrophysics

Doosoo Yoon

University of Amsterdam

Andre Young

Radboud University

Ken Young

Harvard-Smithsonian Center for Astrophysics

Ziri Younsi

University College London (UCL)

Goethe University Frankfurt

Feng Yuan

Chinese Academy of Sciences

Ye-Fei Yuan

University of Science and Technology of China

J. Anton Zensus

Max Planck Society

Shuo Zhang

Bard College

Shan-Shan Zhao

Chinese Academy of Sciences

Astrophysical Journal

0004-637X (ISSN) 1538-4357 (eISSN)

Vol. 943 2 170

RadioNet 4

European Commission (EC) (EC/H2020/730562), 2017-01-01 -- 2020-12-31.

Subject Categories (SSIF 2011)

Astronomy, Astrophysics and Cosmology

DOI

10.3847/1538-4357/acaea8

More information

Latest update

3/18/2025