<script type="text/javascript">
<!--
document.write('<div id="oa_widget"></div>');
document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=undefined&type=result"></script>');
-->
</script>

COPY SCRIPT

For further information contact us at helpdesk@openaire.eu

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

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 01 Aug 2022Embargo end date: 01 Jan 2022 Spain, Denmark, Netherlands, France, Netherlands, United States, Italy, France, Italy, United States, South Africa, Italy, Netherlands, France, France, Netherlands, United Kingdom, Netherlands, Netherlands, Finland Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 934, page 145 (issn: 0004-637X, eissn: 1538-4357,

Copyright policy )Publicly fundedFunded by:NSERC | unidentified, NSF | Graduate Research Fellows..., NWO | From micro- to mega-scale... +19 projects

Authors: Sara Issaoun; Maciek Wielgus; Svetlana Jorstad; Thomas P. Krichbaum; Lindy Blackburn; Michael Janssen; Chi-kwan Chan; +193 Authors

Sara Issaoun; Maciek Wielgus; Svetlana Jorstad; Thomas P. Krichbaum; Lindy Blackburn; Michael Janssen; Chi-kwan Chan; Dominic W. Pesce; José L. Gómez; Kazunori Akiyama; Monika Mościbrodzka; Iván Martí-Vidal; Andrew Chael; Rocco Lico; Jun 俊 Liu 刘; Venkatessh Ramakrishnan; Mikhail Lisakov; Antonio Fuentes; Guang-Yao Zhao; Kotaro Moriyama; Avery E. Broderick; Paul Tiede; Nicholas R. MacDonald; Yosuke Mizuno; Efthalia Traianou; Laurent Loinard; Jordy Davelaar; Mark Gurwell; Ru-Sen 如森 Lu 路; Antxon Alberdi; Walter Alef; Juan Carlos Algaba; 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; Wilfred Boland; Katherine L. Bouman; 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; Koushik Chatterjee; Shami Chatterjee; Ming-Tang Chen; Yongjun 永军 Chen 陈; Ilje Cho; Pierre Christian; Nicholas S. Conroy; John E. Conway; James M. Cordes; Thomas M. Crawford; Geoffrey B. Crew; Alejandro Cruz-Osorio; Yuzhu Cui; Mariafelicia De Laurentis; Roger Deane; Jessica Dempsey; Gregory Desvignes; Jason Dexter; Sheperd S. Doeleman; Vedant Dhruv; Sergio Abraham Dzib Quijano; 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 敏峰 Gu 顾; Kazuhiro Hada; Daryl Haggard; Michael H. Hecht; Ronald Hesper; Luis C. 子山 Ho 何; Paul Ho; Mareki Honma; Chih-Wei L. Huang; Lei 磊 Huang 黄; David H. Hughes; Shiro Ikeda; C. M. Violette Impellizzeri; Makoto Inoue; David J. James; Buell T. Jannuzi; Britton Jeter; Wu 悟 Jiang 江; Alejandra Jimenez-Rosales; Michael D. Johnson; Abhishek V. Joshi; Taehyun Jung; Mansour Karami; Ramesh Karuppusamy; Tomohisa Kawashima; Garrett K. Keating; Mark Kettenis; Dong-Jin Kim; Jae-Young Kim; Jongsoo Kim; Junhan Kim; Motoki Kino; Jun Yi Koay; Prashant Kocherlakota; Yutaro Kofuji; Patrick M. Koch; 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 志远 Li 李; Rocco Lico; Greg Lindahl; Michael Lindqvist; Kuo Liu; Elisabetta Liuzzo; Wen-Ping Lo; Andrei P. Lobanov; Colin Lonsdale; Jirong 基荣 Mao 毛; 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; 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; 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; Felix M. Pötzl;

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

- Summary
- Subjects
- Related research
  (6)
- Metrics

Abstract

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 μas 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.

Countries

Spain, Denmark, Netherlands, France, Netherlands, United States, Italy, France, Italy, United States, South Africa, Italy, Netherlands, France, France, Netherlands, United Kingdom, Netherlands, Netherlands, Finland

Related Organizations

French National Centre for Scientific Research
France
Cornell University
United States
University College London
United Kingdom
University of Illinois at Urbana Champaign
United States
King’s University
United States

View all View all

Keywords

POLARIZATION, 1346, Astronomy, F521, M87, [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], 870, Atomic, Very long baseline interferometry (1769), Jets, particle and plasma physics, Very long baseline interferometry (VLBI), MAGNETIC-FIELD STRUCTURE, High Energy Astrophysical Phenomena (astro-ph.HE), 164, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Space sciences, RESULTS. I., 001, 520, Particle and high energy physics, Astronomy & astrophysics, Jets (870), RELATIVISTIC JETS, Astrophysics - High Energy Astrophysical Phenomena, High energy astrophysics, 330, FOS: Physical sciences, AGN JETS, 530, Active galaxies (17), Event Horizon Telescope (EHT), [SDU] Sciences of the Universe [physics], 739, Radio interferometry (1346), molecular, 1769, BLACK-HOLES, Astronomical and space sciences, Very long baseline interferometry, Active galactic nuclei, SAGITTARIUS A-ASTERISK, SHADOW, Astronomy and Astrophysics, High energy astrophysics (739), 17, 16, nuclear, [SDU]Sciences of the Universe [physics], Space and Planetary Science, Physical chemistry (incl. structural), Astronomical sciences, Active galaxies, Active galactic nuclei (16), Radio interferometry, VLBI, Blazars (164), Mathematics, Blazars

6 Research products, page 1 of 1

First Sagittarius A* Event Horizon Telescope Results. VI. Testing the Black Hole Metric
2022IsAmongTopNSimilarDocuments
First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole
2022IsAmongTopNSimilarDocuments
First Sagittarius A* Event Horizon Telescope Results. IV. Variability, Morphology, and Black Hole Mass
2022IsAmongTopNSimilarDocuments
First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
2022IsAmongTopNSimilarDocuments
First Sagittarius A* Event Horizon Telescope Results. II. EHT and Multiwavelength Observations, Data Processing, and Calibration
2022IsAmongTopNSimilarDocuments
First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center Supermassive Black Hole
2022IsAmongTopNSimilarDocuments

Impact byBIP!

	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	43
	popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.	Top 10%
	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Top 10%
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Top 1%

Usage byUsageCounts

visibility	views	33
download	downloads	25

33
views
25
downloads
Powered by

Found an issue? Give us feedback

visibility

download

Top 10%

Top 1%

Green

gold

Beta

SDGs Suggest

4. Education

Beta

SDGs:

4. Education,

Fields of Science

Fields of Science

Funded byView all

NSERC| unidentified, NSF| Graduate Research Fellowship Program (GRFP), NWO| From micro- to mega-scales: understanding how black holes shape the local Universe, NSF| The iPlant Collaborative: Cyberinfrastructure for the Life Sciences

Related to Research communitiesView all

Aurora Universities Network

FORTHEM Alliance

Knowmad Institut

NEANIAS Space Research Community

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

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

6 Research products, page 1 of 1

First Sagittarius A* Event Horizon Telescope Results. VI. Testing the Black Hole Metric

First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole

First Sagittarius A* Event Horizon Telescope Results. IV. Variability, Morphology, and Black Hole Mass

First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way

First Sagittarius A* Event Horizon Telescope Results. II. EHT and Multiwavelength Observations, Data Processing, and Calibration

First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center Supermassive Black Hole