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Akiyama, Kazunori
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Alberdi, Antxon
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Alef, Walter
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Algaba, Juan Carlos
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Anantua, Richard
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Asada, Keiichi
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Azulay, Rebecca
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Bach, Uwe
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Baczko, Anne-Kathrin
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Ball, David
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Balokovic, Mislav
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Bandyopadhyay, Bidisha
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Barrett, John
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Baubock, Michi
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Benson, Bradford A.
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Bintley, Dan
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Blackburn, Lindy
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Blundell, Raymond
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Bouman, Katherine L.
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Bower, Geoffrey C.
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Boyce, Hope
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Bremer, Michael
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Brissenden, Roger
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Britzen, Silke
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Broderick, Avery E.
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Broguiere, Dominique
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Bronzwaer, Thomas
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Bustamante, Sandra
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Carlstrom, John E.
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Chael, Andrew
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Chan, Chi-Kwan
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Chang, Dominic O.
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Chatterjee, Koushik
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Chatterjee, Shami
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Chen, Ming-Tang
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Chen, Yongjun
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Cheng, Xiaopeng
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Cho, Ilje
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Christian, Pierre
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Conroy, Nicholas S.
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Conway, John E.
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Crawford, Thomas M.
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Crew, Geoffrey B.
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Cruz-Osorio, Alejandro
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Cui, Yuzhu
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Dahale, Rohan
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Davelaar, Jordy
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De Laurentis, Mariafelicia
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Deane, Roger
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Dempsey, Jessica
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Desvignes, Gregory
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Dexter, Jason
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Dhruv, Vedant
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Dihingia, Indu K.
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Doeleman, Sheperd S.
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Dzib, Sergio A.
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Eatough, Ralph P.
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Emami, Razieh
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Falcke, Heino
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Farah, Joseph
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Fish, Vincent L.
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Fomalont, Edward
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Ford, H. Alyson
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Foschi, Marianna
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Fraga-Encinas, Raquel
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Freeman, William T.
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Friberg, Per
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Fromm, Christian M.
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Fuentes, Antonio
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Galison, Peter
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Gammie, Charles F.
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Garcia, Roberto
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Gentaz, Olivier
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Georgiev, Boris
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Goddi, Ciriaco
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Gold, Roman
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Gomez-Ruiz, Arturo I.
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Gomez, Jose L.
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Gu, Minfeng
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Gurwell, Mark
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Hada, Kazuhiro
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Haggard, Daryl
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Hesper, Ronald
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Heumann, Dirk
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Ho, Luis C.
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Ho, Paul
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Honma, Mareki
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Huang, Chih-Wei L.
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Huang, Lei
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Hughes, David H.
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Ikeda, Shiro
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Impellizzeri, C. M. Violette
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Inoue, Makoto
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Issaoun, Sara
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James, David J.
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Jannuzi, Buell T.
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Janssen, Michael
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Jeter, Britton
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Jiang, Wu
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Jimenez-Rosales, Alejandra
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Johnson, Michael D.
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Jorstad, Svetlana
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Jones, Adam C.
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Joshi, Abhishek V.
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Jung, Taehyun
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Karuppusamy, Ramesh
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Kawashima, Tomohisa
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Keating, Garrett K.
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Kettenis, Mark
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Kim, Dong-Jin
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Kim, Jae-Young
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Kim, Jongsoo
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Kim, Junhan
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Kino, Motoki
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Koay, Jun Yi
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Kocherlakota, Prashant
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Kofuji, Yutaro
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Koch, Patrick M.
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Koyama, Shoko
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Kramer, Carsten
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Kramer, Joana A.
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Kramer, Michael
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Krichbaum, Thomas P.
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Kuo, Cheng-Yu
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La Bella, Noemi
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Lee, Sang-Sung
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Levis, Aviad
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Li, Zhiyuan
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Lico, Rocco
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Lindahl, Greg
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Lindqvist, Michael
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Lisakov, Mikhail
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Liu, Jun
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Liu, Kuo
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Liuzzo, Elisabetta
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Lo, Wen-Ping
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Lobanov, Andrei P.
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Loinard, Laurent
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Lonsdale, Colin J.
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Lowitz, Amy E.
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Lu, Ru-Sen
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MacDonald, Nicholas R.
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Mao, Jirong
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Marchili, Nicola
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Markoff, Sera
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Marrone, Daniel P.
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Marscher, Alan P.
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Marti-Vidal, Ivan
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Matsushita, Satoki
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Matthews, Lynn D.
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Medeiros, Lia
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Menten, Karl M.
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Mizuno, Izumi
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Mizuno, Yosuke
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Montgomery, Joshua
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Moran, James M.
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Moriyama, Kotaro
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Moscibrodzka, Monika
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Mulaudzi, Wanga
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Mueller, Cornelia
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Mueller, Hendrik
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Mus, Alejandro
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Musoke, Gibwa
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Myserlis, Ioannis
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Nagai, Hiroshi
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Nagar, Neil M.
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Nakamura, Masanori
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Narayanan, Gopal
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Natarajan, Iniyan
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Nathanail, Antonios
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Fuentes, Santiago Navarro
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Neilsen, Joey
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Ni, Chunchong
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Nowak, Michael A.
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Oh, Junghwan
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Okino, Hiroki
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Olivares, Hector
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Oyama, Tomoaki
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Ozel, Feryal
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Palumbo, Daniel C. M.
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Paraschos, Georgios Filippos
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Park, Jongho
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Parsons, Harriet
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Patel, Nimesh
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Pen, Ue-Li
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Pesce, Dominic W.
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Pietu, Vincent
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PopStefanija, Aleksandar
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Porth, Oliver
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Prather, Ben
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Psaltis, Dimitrios
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Pu, Hung-Yi
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Ramakrishnan, Venkatessh
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Rao, Ramprasad
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Rawlings, Mark G.
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Raymond, Alexander W.
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Rezzolla, Luciano
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Ricarte, Angelo
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Ripperda, Bart
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Roelofs, Freek
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Romero-Canizales, Cristina
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Ros, Eduardo
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Roshanineshat, Arash
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Rottmann, Helge
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Roy, Alan L.
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Ruiz, Ignacio
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Ruszczyk, Chet
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Rygl, Kazi L. J.
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Sanchez, Salvador
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Sanchez-Arguelles, David
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Sanchez-Portal, Miguel
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Sasada, Mahito
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Satapathy, Kaushik
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Savolainen, Tuomas
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Schloerb, F. Peter
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Schonfeld, Jonathan
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Schuster, Karl-Friedrich
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Shao, Lijing
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Shen, Zhiqiang
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Small, Des
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Sohn, Bong Won
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SooHoo, Jason
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Salas, Leon David Sosapanta
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Souccar, Kamal
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Stanway, Joshua S.
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Sun, He
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Tazaki, Fumie
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Tetarenko, Alexandra J.
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Tiede, Paul
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Tilanus, Remo P. J.
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Titus, Michael
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Toma, Kenji
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Torne, Pablo
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Toscano, Teresa
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Traianou, Efthalia
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Trent, Tyler
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Trippe, Sascha
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Turk, Matthew
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van Bemmel, Ilse
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van Langevelde, Huib Jan
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van Rossum, Daniel R.
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Vos, Jesse
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Wagner, Jan
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Ward-Thompson, Derek
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Wardle, John
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Washington, Jasmin E.
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Weintroub, Jonathan
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Wharton, Robert
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Wielgus, Maciek
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Wiik, Kaj
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Witzel, Gunther
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Wondrak, Michael F.
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Wong, George N.
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Wu, Qingwen
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Yadlapalli, Nitika
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Yamaguchi, Paul
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Yfantis, Aristomenis
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Yoon, Doosoo
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Young, Andre
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Younsi, Ziri
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Yu, Wei
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Yuan, Feng
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Yuan, Ye-Fei
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Zensus, J. Anton
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Zhang, Shuo
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Zhao, Guang-Yao
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Zhao, Shan-Shan
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Allardi, Alexander
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Chang, Shu-Hao
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Chang, Chih-Cheng
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Chang, Song-Chu
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Chen, Chung-Chen
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Chilson, Ryan
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Faber, Aaron
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Gale, David M.
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Han, Chih-Chiang
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Han, Kuo-Chang
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Hasegawa, Yutaka
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Hernandez-Rebollar, Jose Luis
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Huang, Yau-De
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Jiang, Homin
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Jinchi, Hao
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Kimura, Kimihiro
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Kubo, Derek
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Li, Chao-Te
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Lin, Lupin C. -C.
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Liu, Ching-Tang
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Liu, Kuan-Yu
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Lu, Li-Ming
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Martin-Cocher, Pierre
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Meyer-Zhao, Zheng
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Montana, Alfredo
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Moraghan, Anthony
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Moreno-Nolasco, Marcos Emir
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Nishioka, Hiroaki
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Norton, Timothy J.
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Nystrom, George
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Ogawa, Hideo
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Oshiro, Peter
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Pradel, Nicolas
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Principe, Giacomo
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Raffin, Philippe
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Rodriguez-Montoya, Ivan
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Shaw, Paul
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Snow, William
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Sridharan, Tirupati Kumara
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Srinivasan, Ranjani
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Wei, Ta-Shun
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Yu, Chen-Yu
Total Authors: 309
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| Document type: | Journal article |
| Source: | Astronomy & Astrophysics; v. 681, p. 63-pg., 2024-01-18. |
| Abstract | |
In April 2019, the Event Horizon Telescope (EHT) Collaboration reported the first-ever event-horizon-scale images of a black hole, resolving the central compact radio source in the giant elliptical galaxy M87. These images reveal a ring with a southerly brightness distribution and a diameter of similar to 42 mu as, consistent with the predicted size and shape of a shadow produced by the gravitationally lensed emission around a supermassive black hole. These results were obtained as part of the April 2017 EHT observation campaign, using a global very long baseline interferometric radio array operating at a wavelength of 1.3 mm. Here, we present results based on the second EHT observing campaign, taking place in April 2018 with an improved array, wider frequency coverage, and increased bandwidth. In particular, the additional baselines provided by the Greenland telescope improved the coverage of the array. Multiyear EHT observations provide independent snapshots of the horizon-scale emission, allowing us to confirm the persistence, size, and shape of the black hole shadow, and constrain the intrinsic structural variability of the accretion flow. We have confirmed the presence of an asymmetric ring structure, brighter in the southwest, with a median diameter of 43 :3(-3:1)(+1:5) mu as. The diameter of the 2018 ring is remarkably consistent with the diameter obtained from the previous 2017 observations. On the other hand, the position angle of the brightness asymmetry in 2018 is shifted by about 30 degrees relative to 2017. The perennial persistence of the ring and its diameter robustly support the interpretation that the ring is formed by lensed emission surrounding a Kerr black hole with a mass similar to 6 :5 Chi 10(9) M-circle dot. The significant change in the ring brightness asymmetry implies a spin axis that is more consistent with the position angle of the large-scale jet. (AU) | |
| FAPESP's process: | 21/01183-8 - Astrophysical jets at the highest-angular resolution with very long baseline interferometry |
| Grantee: | Ciriaco Goddi |
| Support Opportunities: | Research Grants - Young Investigators Grants |