| Title | Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope |
| Authors | Issaoun, Sara Wielgus, Maciek Jorstad, Svetlana Krichbaum, Thomas P. Blackburn, Lindy Janssen, Michael Chan, Chi-kwan Pesce, Dominic W. Gomez, Jose L. Akiyama, Kazunori Moscibrodzka, Monika Marti-Vidal, Ivan Chael, Andrew Lico, Rocco Liu, Jun Ramakrishnan, Venkatessh Lisakov, Mikhail Fuentes, Antonio Zhao, Guang-Yao Moriyama, Kotaro Broderick, Avery E. Tiede, Paul MacDonald, Nicholas R. Mizuno, Yosuke Traianou, Efthalia Loinard, Laurent Davelaar, Jordy Gurwell, Mark Lu, Ru-Sen Alberdi, Antxon Alef, Walter Algaba, Juan Carlos Anantua, Richard Asada, Keiichi Azulay, Rebecca Bach, Uwe Baczko, Anne-Kathrin Ball, David Balokovic, Mislac Barrett, John Baubock, Michi Benson, Bradford A. Bintley, Dan Blundell, Raymond Boland, Wilfred Bouman, Katherine L. Bower, Geoffrey C. Boyce, Hope Bremer, Michael Brinkerink, Christiaan D. Brissenden, Roger Britzen, Silke Broguiere, Dominique Bronzwaer, Thomas Bustamante, Sandra Byun, Do-Young Carlstrom, John E. Ceccobello, Chiara Chatterjee, Koushik Chatterjee, Shami Chen, Ming-Tang Chen, Yongjun Cho, Ilje Christian, Pierre Conroy, Nicholas S. Conway, John E. Cordes, James M. Crawford, Thomas M. Crew, Geoffrey B. Cruz-Osorio, Alejandro Cui, Yuzhu De Laurentis, Mariafelicia Deane, Roger Dempsey, Jessica Desvignes, Gregory Dexter, Jason Doeleman, Sheperd S. Dhruv, Vedant Quijano, Sergio Abraham Dzib Eatough, Ralph P. Emami, Razieh Falcke, Heino Farah, Joseph Fish, Vincent L. Fomalont, Ed Ford, H. Alyson Fraga-Encinas, Raquel Freeman, William T. Friberg, Per Fromm, Christian M. Galison, Peter Gammie, Charles F. Garcia, Roberto Gentaz, Olivier Georgiev, Boris Goddi, Ciriaco Gold, Roman Gomez-Ruiz, Arturo, I Gu, Minfeng Hada, Kazuhiro Haggard, Daryl Hecht, Michael H. Hesper, Ronald Ho, Luis C. Ho, Paul Honma, Mareki Huang, Chih-Wei L. Huang, Lei Hughes, David H. Ikeda, Shiro Impellizzeri, C. M. Violette Inoue, Makoto James, David J. Jannuzi, Buell T. Jeter, Britton Jiang, Wu Jimenez-Rosales, Alejandra Johnson, Michael D. Joshi, Abhishek, V Jung, Taehyun Karami, Mansour Karuppusamy, Ramesh Kawashima, Tomohisa Keating, Garrett K. Kettenis, Mark Kim, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kino, Motoki Koay, Jun Yi Kocherlakota, Prashant Kofuji, Yutaro Koch, Patrick M. Koyama, Shoko Kramer, Carsten Kramer, Michael Kuo, Cheng-Yu La Bella, Noemi Lauer, Tod R. Lee, Daeyoung Lee, Sang-Sung Leung, Po Kin Levis, Aviad Li, Zhiyuan Lindahl, Greg Lindqvist, Michael Liu, Kuo Liuzzo, Elisabetta Lo, Wen-Ping Lobanov, Andrei P. Lonsdale, Colin Mao, Jirong Marchili, Nicola Markoff, Sera Marrone, Daniel P. Marscher, Alan P. Matsushita, Satoki Matthews, Lynn D. Medeiros, Lia Menten, Karl M. Michalik, Daniel Mizuno, Izumi Mizuno, Yosuke Moran, James M. Mueller, Cornelia Mus, Alejandro Musoke, Gibwa Myserlis, Ioannis Nadolski, Andrew Nagai, Hiroshi Nagar, Neil M. Nakamura, Masanori Narayan, Ramesh Narayanan, Gopal Natarajan, Iniyan Nathanail, Antonios Neilsen, Joey Neri, Roberto Ni, Chunchong Noutsos, Aristeidis Nowak, Michael A. Oh, Junghwan Okino, Hiroki Olivares, Hector Ortiz-Leon, Gisela N. Oyama, Tomoaki Ozel, Feryal Palumbo, Daniel C. M. Paraschos, Georgios Filippos Park, Jongho Parsons, Harriet Patel, Nimesh Pen, Ue-Li Pietu, Vincent Plambeck, Richard PopStefanija, Aleksandar Porth, Oliver Potzl, Felix M. Prather, Ben Preciado-Lopez, Jorge A. Psaltis, Dimitrios Pu, Hung-Yi Rao, Ramprasad Rawlings, Mark G. Raymond, Alexander W. Rezzolla, Luciano Ricarte, Angelo Ripperda, Bart Roelofs, Freek Rogers, Alan Ros, Eduardo Romero-Canizales, Cristina Roshanineshat, Arash Rottmann, Helge Roy, Alan L. Ruiz, Ignacio Ruszczyk, Chet Rygl, Kazi L. J. Sanchez, Salvador Sanchez-Arguelles, David Sanchez-Portal, Miguel Sasada, Mahito Satapathy, Kaushik Savolainen, Tuomas Schloerb, F. Peter Schuster, Karl-Friedrich Shao, Lijing Shen, Zhiqiang Small, Des Sohn, Bong Won SooHoo, Jason Souccar, Kamal Sun, He Tazaki, Fumie Tetarenko, Alexandra J. Tilanus, Remo P. J. Titus, Michael Torne, Pablo Trent, Tyler Trippe, Sascha van Bemmel, Ilse van Langevelde, Huib Jan van Rossum, Daniel R. Vos, Jesse Wagner, Jan Ward-Thompson, Derek Wardle, John Weintroub, Jonathan Wex, Norbert Wharton, Robert Wiik, Kaj Witzel, Gunther Wondrak, Michael Wong, George N. Wu, Qingwen Yamaguchi, Paul Yoon, Doosoo Young, Andre Young, Ken Younsi, Ziri Yuan, Feng Yuan, Ye-Fei Zensus, J. Anton Zhang, Shuo Zhao, Shan-Shan |
| Affiliation | Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA Radboud Univ Nijmegen, Inst Math Astrophys & Particle Phys IMAPP, Dept Astrophys, POB 9010, NL-6500 GL Nijmegen, Netherlands NASA Hubble Fellowship Program, Baltimore, MD 21218 USA Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany Boston Univ, Inst Astrophys Res, 725 Commonwealth Ave, Boston, MA 02215 USA Harvard Univ, Black Hole Initiat, 20 Garden St, Cambridge, MA 02138 USA Univ Arizona, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85721 USA Univ Arizona, Dept Astron, 933 N Cherry Ave, Tucson, AZ 85721 USA Univ Arizona, Data Sci Inst, 1230 N Cherry Ave, Tucson, AZ 85721 USA Inst Astrofis Andalucia CSIC, Glorieta Astron S-N, E-18008 Granada, Spain MIT, Haystack Observ, 99 Millstone Rd, Westford, MA 01886 USA Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan Univ Valencia, Dept Astron & Astrofis, C Dr Moliner 50, E-46100 Valencia, Spain Univ Valencia, Observ Astron, 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Rhodes Univ, Ctr Radio Astron Tech & Technol, Dept Phys & Elect, ZA-6140 Makhanda, South Africa ASTRON, Oude Hoogeveensedijk 4, NL-7991 PD Dwingeloo, Netherlands Univ Paris, Sorbonne Univ, Univ PSL, LESIA,Observ Paris,CNRS, 5 Pl Jules Janssen, F-92195 Meudon, France Univ Colorado, JILA, Boulder, CO 80309 USA Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China Cumbres Observ, 6740 Cortona Dr,Suite 102, Goleta, CA 93117 USA Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA MIT, Dept Elect Engn & Comp Sci, 32-D476,77 Massachusetts Ave, Cambridge, MA 02142 USA Google Res, 355 Main St, Cambridge, MA 02142 USA Univ Wurzburg, Inst Theoret Phys & Astrophys, Emil Fischer Str 31, D-97074 Wurzburg, Germany Harvard Univ, Dept Hist Sci, Cambridge, MA 02138 USA Harvard Univ, Dept Phys, Cambridge, MA 02138 USA Univ Cagliari, Dipartimento Fis, SP Monserrato Sestu Km 0-7, I-09042 Monserrato, Italy INAF Osservatorio Astron Cagliari, Via Sci 5, I-09047 Selargius, CA, Italy Univ Southern Denmark, CP3 Origins, Campusvej 55, DK-5230 Odense M, Denmark Inst Nacl Astrofis Opt & Electr, Apartado Postal 51 & 216, Puebla 72000, Pue, Mexico Consejo Nacl Ciencia & Technol, Av Insurgentes Sur 1582, Ciudad De Mexico 03940, Mexico Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China Univ Groningen, Kapteyn Astron Inst, NOVA Sub Mm Instrumentat Grp, Landleven 12, NL-9747 AD Groningen, Netherlands Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China Univ Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan Inst Stat Math, 10-3 Midori Cho, Tachikawa, Tokyo 1908562, Japan Grad Univ Adv Studies SOKENDAI, Dept Stat Sci, 10-3 Midori Cho, Tachikawa, Tokyo 1908562, Japan Univ 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Univ, Dept Phys, 1,Sect 4,1 Roosevelt Rd, Taipei 10617, Taiwan Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China Chinese Acad Sci, Ctr Astron Megasci, 20A Datun Rd, Beijing 100012, Peoples R China Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China Univ Amsterdam, Anton Pannekoek Inst Astron, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands Univ Amsterdam, Gravitat & Astroparticle Phys Amsterdam GRAPPA In, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands Inst Adv Study, Sch Nat Sci, 1 Einstein Dr, Princeton, NJ 08540 USA European Space Res & Technol Ctr ESA ESTEC, Directorate Sci, Sci Support Off, Keplerlaan 1, NL-2201 AZ Noordwijk, Netherlands Inst Radioastronom Milimetr, IRAM, Ave Divina Pastora 7,Local 20, E-18012 Granada, Spain Hachinohe Coll, Natl Inst Technol, 16-1 Uwanotai, Hachinohe, Aomori 0391192, Japan South African Radio Astron Observ, Observ 7925, Cape Town, South Africa Natl & Kapodistrian Univ Athens, Dept Phys, GR-15783 Zografos, Greece Villanova Univ, Mendel Sci Ctr, Rm 263B,800 E Lancaster Ave, Villanova, PA 19085 USA Washington Univ, Phys Dept, CB 1105, St Louis, MO 63130 USA Sejong Univ, Seoul, South Korea Univ Toronto, Canadian Inst Theoret Astrophys, 60 St George St, Toronto, ON M5S 3H8, Canada Univ Toronto, Dunlap Inst Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada Canadian Inst Adv Res, 180 Dundas St West, Toronto, ON M5G 1Z8, Canada Univ Calif Berkeley, Radio Astron Lab, Berkeley, CA 94720 USA Univ Coll Cork, Dept Phys, Kane Bldg,Coll Rd, Cork T12 K8AF, Ireland Natl Taiwan Normal Univ, Dept Phys, 88,Sec 4,Tingzhou Rd, Taipei 116, Taiwan Natl Taiwan Normal Univ, Ctr Astron & Gravitat, 88,Sec 4,Tingzhou Rd, Taipei 116, Taiwan Gemini Observ, 670 N Aohoku Pl, Hilo, HI 96720 USA Frankfurt Inst Adv Studies, Ruth Moufang Str 1, D-60438 Frankfurt, Germany Trinity Coll Dublin, Sch Math, Dublin 2, Ireland Princeton Univ, Dept Astrophys Sci, Peyton Hall, Princeton, NJ 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Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China Univ Sci & Technol China, Astron Dept, Hefei 230026, Peoples R China Bard Coll, 30 Campus Rd, Annandale On Hudson, NY 12504 USA |
| Keywords | SAGITTARIUS A-ASTERISK MAGNETIC-FIELD STRUCTURE RELATIVISTIC JETS BLACK-HOLES RESULTS. I. AGN JETS POLARIZATION VLBI M87 SHADOW |
| Issue Date | 1-Aug-2022 |
| Publisher | ASTROPHYSICAL JOURNAL |
| 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 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. |
| URI | http://hdl.handle.net/20.500.11897/650057 |
| ISSN | 0004-637X |
| DOI | 10.3847/1538-4357/ac7a40 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 科维理天文与天体物理研究所 |
