학술논문
The Event Horizon Telescope Image of the Quasar NRAO 530
Document Type
article
Author
Svetlana Jorstad; Maciek Wielgus; Rocco Lico; Sara Issaoun; Avery E. Broderick; Dominic W. Pesce; Jun Liu; Guang-Yao Zhao; Thomas P. Krichbaum; Lindy Blackburn; Chi-kwan Chan; Michael Janssen; Venkatessh Ramakrishnan; Kazunori Akiyama; Antxon Alberdi; Juan Carlos Algaba; Katherine L. Bouman; Ilje Cho; Antonio Fuentes; José L. Gómez; Mark Gurwell; Michael D. Johnson; Jae-Young Kim; Ru-Sen Lu; Iván Martí-Vidal; Monika Moscibrodzka; Felix M. Pötzl; Efthalia Traianou; Ilse van Bemmel; Walter Alef; Richard Anantua; Keiichi Asada; Rebecca Azulay; Uwe Bach; Anne-Kathrin Baczko; David Ball; Mislav Baloković; John Barrett; Michi Bauböck; Bradford A. Benson; Dan Bintley; Raymond Blundell; Geoffrey C. Bower; Hope Boyce; Michael Bremer; Christiaan D. Brinkerink; Roger Brissenden; Silke Britzen; Dominique Broguiere; Thomas Bronzwaer; Sandra Bustamante; Do-Young Byun; John E. Carlstrom; Chiara Ceccobello; Andrew Chael; Koushik Chatterjee; Shami Chatterjee; Ming-Tang Chen; Yongjun Chen; Xiaopeng Cheng; Pierre Christian; Nicholas S. Conroy; John E. Conway; James M. Cordes; Thomas M. Crawford; Geoffrey B. Crew; Alejandro Cruz-Osorio; Yuzhu Cui; Jordy Davelaar; Mariafelicia De Laurentis; Roger Deane; Jessica Dempsey; Gregory Desvignes; Jason Dexter; Vedant Dhruv; Sheperd S. Doeleman; Sean Dougal; Sergio A. Dzib; Ralph P. Eatough; Razieh Emami; Heino Falcke; Joseph Farah; Vincent L. Fish; Ed Fomalont; H. Alyson Ford; Raquel Fraga-Encinas; William T. Freeman; Per Friberg; Christian M. Fromm; Peter Galison; Charles F. Gammie; Roberto García; Olivier Gentaz; Boris Georgiev; Ciriaco Goddi; Roman Gold; Arturo I. Gómez-Ruiz; Minfeng Gu; Kazuhiro Hada; Daryl Haggard; Kari Haworth; Michael H. Hecht; Ronald Hesper; Dirk Heumann; Luis C. Ho; Paul Ho; Mareki Honma; Chih-Wei L. Huang; Lei Huang; David H. Hughes; Shiro Ikeda; C. M. Violette Impellizzeri; Makoto Inoue; David J. James; Buell T. Jannuzi; Britton Jeter; Wu Jiang; Alejandra Jiménez-Rosales; Abhishek V. Joshi; Taehyun Jung; Mansour Karami; Ramesh Karuppusamy; Tomohisa Kawashima; Garrett K. Keating; Mark Kettenis; Dong-Jin Kim; Jongsoo Kim; Junhan Kim; Motoki Kino; Jun Yi Koay; Prashant Kocherlakota; Yutaro Kofuji; Shoko Koyama; Carsten Kramer; Michael Kramer; Cheng-Yu Kuo; Noemi La Bella; Tod R. Lauer; Daeyoung Lee; Sang-Sung Lee; Po Kin Leung; Aviad Levis; Zhiyuan Li; Greg Lindahl; Michael Lindqvist; Mikhail Lisakov; Kuo Liu; Elisabetta Liuzzo; Wen-Ping Lo; Andrei P. Lobanov; Laurent Loinard; Colin J. Lonsdale; Nicholas R. MacDonald; Jirong Mao; Nicola Marchili; Sera Markoff; Daniel P. Marrone; Alan P. Marscher; Satoki Matsushita; Lynn D. Matthews; Lia Medeiros; Karl M. Menten; Daniel Michalik; Izumi Mizuno; Yosuke Mizuno; James M. Moran; Kotaro Moriyama; Cornelia Müller; Alejandro Mus; Gibwa Musoke; Ioannis Myserlis; Andrew Nadolski; Hiroshi Nagai; Neil M. Nagar; Masanori Nakamura; Ramesh Narayan; Gopal Narayanan; Iniyan Natarajan; Antonios Nathanail; Santiago Navarro Fuentes; Joey Neilsen; Roberto Neri; Chunchong Ni; Aristeidis Noutsos; Michael A. Nowak; Junghwan Oh; Hiroki Okino; Héctor Olivares; Gisela N. Ortiz-León; Tomoaki Oyama; Feryal Özel; Daniel C. M. Palumbo; Georgios Filippos Paraschos; Jongho Park; Harriet Parsons; Nimesh Patel; Ue-Li Pen; Vincent Piétu; Richard Plambeck; Aleksandar PopStefanija; Oliver Porth; Ben Prather; Jorge A. Preciado-López; Dimitrios Psaltis; Hung-Yi Pu; Ramprasad Rao; Mark G. Rawlings; Alexander W. Raymond; Luciano Rezzolla; Angelo Ricarte; Bart Ripperda; Freek Roelofs; Alan Rogers; Eduardo Ros; Cristina Romero-Cañizales; Arash Roshanineshat; Helge Rottmann; Alan L. Roy; Ignacio Ruiz; Chet Ruszczyk; Kazi L. J. Rygl; Salvador Sánchez; David Sánchez-Argüelles; Miguel Sánchez-Portal; Mahito Sasada; Kaushik Satapathy; Tuomas Savolainen; F. Peter Schloerb; Jonathan Schonfeld; Karl-Friedrich Schuster; Lijing Shao; Zhiqiang Shen; Des Small; Bong Won Sohn; Jason SooHoo; Kamal Souccar; He Sun; Fumie Tazaki; Alexandra J. Tetarenko; Paul Tiede; Remo P. J. Tilanus; Michael Titus; Pablo Torne; Tyler Trent; Sascha Trippe; Matthew Turk; Huib Jan van Langevelde; Daniel R. van Rossum; Jesse Vos; Jan Wagner; Derek Ward-Thompson; John Wardle; Jonathan Weintroub; Norbert Wex; Robert Wharton; Kaj Wiik; Gunther Witzel; Michael F. Wondrak; George N. Wong; Qingwen Wu; Paul Yamaguchi; Doosoo Yoon; André Young; Ken Young; Ziri Younsi; Feng Yuan; Ye-Fei Yuan; J. Anton Zensus; Shuo Zhang; Shan-Shan Zhao
Source
The Astrophysical Journal, Vol 943, Iss 2, p 170 (2023)
Subject
Language
English
ISSN
1538-4357
Abstract
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 ∼20 μ 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 ∼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 μ as along a position angle ∼ −28°. 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.