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Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope
Tekijät: Issaoun Sara, Wielgus Maciek, Jorstad Svetlana, Krichbaum Thomas P., Blackburn Lindy, Janssen Michael, Chan Chi-kwan, Pesce Dominic W., Gómez José L., Akiyama Kazunori, Mościbrodzka Monika, Martí-Vidal Iván, 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, Baloković Mislav, Barrett John, Bauböck 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., García Roberto, Gentaz Olivier, Georgiev Boris, Goddi Ciriaco, Gold Roman, Gómez-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, Lico Rocco, 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., Müller 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 Héctor, Ortiz-León Gisela N., Oyama Tomoaki, Özel Feryal, Palumbo Daniel C. M., Paraschos Georgios Filippos, Park Jongho, Parsons Harriet, Patel Nimesh, Pen Ue-Li, Piétu Vincent, Plambeck Richard, PopStefanija Aleksandar, Porth Oliver, Pötzl Felix M., Prather Ben, Preciado-López 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., Sánchez Salvador, Sánchez-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., Tiede Paul, 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 André, Young Ken, Younsi Ziri, Yuan Feng, Yuan Ye-Fei, Zensus J. Anton, Zhang Shuo, Zhao Shan-Shan
Kustantaja: IOP Publishing Ltd
Julkaisuvuosi: 2022
Journal: Astrophysical Journal
Tietokannassa oleva lehden nimi: ASTROPHYSICAL JOURNAL
Lehden akronyymi: ASTROPHYS J
Artikkelin numero: 145
Vuosikerta: 934
Numero: 2
Sivujen määrä: 21
ISSN: 0004-637X
DOI: https://doi.org/10.3847/1538-4357/ac7a40
Verkko-osoite: https://iopscience.iop.org/article/10.3847/1538-4357/ac7a40
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/176160989
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.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
