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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Polarimetric Geometric Modeling for mm-VLBI Observations of Black Holes
Astrophysical Journal Letters, Volume 957, No. 2, Article L21, Year 2023
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Description
The Event Horizon Telescope (EHT) is a millimeter very long baseline interferometry (VLBI) array that has imaged the apparent shadows of the supermassive black holes M87* and Sagittarius A*. Polarimetric data from these observations contain a wealth of information on the black hole and accretion flow properties. In this work, we develop polarimetric geometric modeling methods for mm-VLBI data, focusing on approaches that fit data products with differing degrees of invariance to broad classes of calibration errors. We establish a fitting procedure using a polarimetric “m-ring” model to approximate the image structure near a black hole. By fitting this model to synthetic EHT data from general relativistic magnetohydrodynamic models, we show that the linear and circular polarization structure can be successfully approximated with relatively few model parameters. We then fit this model to EHT observations of M87* taken in 2017. In total intensity and linear polarization, the m-ring fits are consistent with previous results from imaging methods. In circular polarization, the m-ring fits indicate the presence of event-horizon-scale circular polarization structure, with a persistent dipolar asymmetry and orientation across several days. The same structure was recovered independently of observing band, used data products, and model assumptions. Despite this broad agreement, imaging methods do not produce similarly consistent results. Our circular polarization results, which imposed additional assumptions on the source structure, should thus be interpreted with some caution. Polarimetric geometric modeling provides a useful and powerful method to constrain the properties of horizon-scale polarized emission, particularly for sparse arrays like the EHT. © 2023. The Author(s). Published by the American Astronomical Society.
Authors & Co-Authors
Roelofs, Freek
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Netherlands, Nijmegen
Radboud Universiteit
Johnson, Michael D.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Chael, Andrew A.
United States, Princeton
Princeton University
Janssen, Michael
Germany, Bonn
Max Planck Institute for Radio Astronomy
Wielgus, MacIek Iej
Germany, Bonn
Max Planck Institute for Radio Astronomy
Broderick, Avery E.
Canada, Waterloo
Perimeter Institute for Theoretical Physics
Canada, Waterloo
University of Waterloo
Akiyama, Kazunori
United States, Cambridge
Harvard University
United States, Westford
Mit Haystack Observatory
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Alberdi, A.
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Alef, Walter
Germany, Bonn
Max Planck Institute for Radio Astronomy
Algaba, Juan Carlos
Malaysia, Kuala Lumpur
Universiti Malaya
Anantua, Richard J.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
United States, San Antonio
The University of Texas at San Antonio
Asada, Keiichi
Taiwan, Nankang
Academia Sinica Taiwan
Azulay, Rebecca
Germany, Bonn
Max Planck Institute for Radio Astronomy
Spain, Valencia
Universitat de València
Bach, Uwe
Germany, Bonn
Max Planck Institute for Radio Astronomy
Baczko, Anne Kathrin
Germany, Bonn
Max Planck Institute for Radio Astronomy
Sweden, Gothenburg
Chalmers University of Technology
Ball, David
United States, Tucson
The University of Arizona
Baloković, Mislav
United States, New Haven
Yale University
Barrett, John P.
United States, Westford
Mit Haystack Observatory
Bauböck, Michi
United States, Urbana
University of Illinois Urbana-champaign
Benson, Bradford A.
United States, Batavia
Fermi National Accelerator Laboratory
United States, Chicago
The University of Chicago
Bintley, Dan I.
United States, Hilo
East Asian Observatory
United States, Hilo
James Clerk Maxwell Telescope Jcmt
Blackburn, Lindy L.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Blundell, Raymond
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Bouman, Katherine L.
United States, Pasadena
California Institute of Technology
Bower, Geoffrey C.
Taiwan, Nankang
Academia Sinica Taiwan
United States, Honolulu
University of Hawaiʻi at Mānoa
Boyce, Hope
Unknown Affiliation
Bremer, Michael A.R.
Unknown Affiliation
Brinkerink, Christiaan D.
Netherlands, Nijmegen
Radboud Universiteit
Brissenden, Roger J.V.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Britzen, Silke
Germany, Bonn
Max Planck Institute for Radio Astronomy
Broguière, Dominique
Unknown Affiliation
Bronzwaer, Thomas
Netherlands, Nijmegen
Radboud Universiteit
Bustamante, Sandra
Unknown Affiliation
Byun, Do-young
Unknown Affiliation
Carlstrom, John E.
United States, Chicago
The University of Chicago
Ceccobello, Chiara
Sweden, Gothenburg
Chalmers University of Technology
Chan, Chikwan
United States, Tucson
The University of Arizona
Chang, Dominic O.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Chatterjee, Koushik
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Chatterjee, S.
Unknown Affiliation
Chen, Mingtang
Taiwan, Nankang
Academia Sinica Taiwan
Chen, Yongjun
Unknown Affiliation
Cheng, Xiaopeng
Unknown Affiliation
Cho, Ilje
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Christian, Pierre
Unknown Affiliation
Conroy, Nicholas S.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Conway, John E.
Sweden, Gothenburg
Chalmers University of Technology
Cordes, James M.
Unknown Affiliation
Crawford, Thomas M.
United States, Chicago
The University of Chicago
Crew, Geoffrey B.
United States, Westford
Mit Haystack Observatory
Cruz-Osorio, A.
Unknown Affiliation
Cui, Yuzhu
Unknown Affiliation
Davelaar, Jordy R.J.
Netherlands, Nijmegen
Radboud Universiteit
de Laurentis, Mariafelicia
Unknown Affiliation
Deane, Roger P.
Unknown Affiliation
Dempsey, Jessica T.
United States, Hilo
East Asian Observatory
United States, Hilo
James Clerk Maxwell Telescope Jcmt
Desvignes, Gregory
Germany, Bonn
Max Planck Institute for Radio Astronomy
Dexter, Jason
Unknown Affiliation
Dhruv, Vedant
United States, Urbana
University of Illinois Urbana-champaign
Doeleman, Sheperd S.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Dougal, Sean
United States, Tucson
The University of Arizona
Dzib, Sergio A.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Eatough, Ralph P.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Emami, Razieh
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Falcke, Heino D.
Netherlands, Nijmegen
Radboud Universiteit
Farah, Joseph R.
Unknown Affiliation
Fish, Vincent L.
United States, Westford
Mit Haystack Observatory
Fomalont, Edward B.
Unknown Affiliation
Ford, H. Alyson
United States, Tucson
The University of Arizona
Fraga-Encinas, Raquel
Netherlands, Nijmegen
Radboud Universiteit
Freeman, William T.
Unknown Affiliation
Friberg, Per
United States, Hilo
East Asian Observatory
United States, Hilo
James Clerk Maxwell Telescope Jcmt
Fromm, Christian M.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Fuentes, Antonio
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Galison, Peter Louis
United States, Cambridge
Harvard University
Gammie, Charles F.
United States, Urbana
University of Illinois Urbana-champaign
García, Roberto
Unknown Affiliation
Gentaz, Olivier
Unknown Affiliation
Georgiev, Boris
Canada, Waterloo
Perimeter Institute for Theoretical Physics
Canada, Waterloo
University of Waterloo
Goddi, Ciriaco
Unknown Affiliation
Gold, Roman
Unknown Affiliation
Gómez-Ruiz, Arturo I.
Unknown Affiliation
Gómez, Jose L.
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Gu, Minfeng
Unknown Affiliation
Gurwell, Mark A.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Hada, Kazuhiro
Unknown Affiliation
Haggard, Daryl
Unknown Affiliation
Haworth, Kari
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Hecht, Michael
United States, Westford
Mit Haystack Observatory
Hesper, Ronald
Unknown Affiliation
Heumann, Dirk
United States, Tucson
The University of Arizona
Ho, Luis C.
Unknown Affiliation
Ho, Paul T.P.
Taiwan, Nankang
Academia Sinica Taiwan
United States, Hilo
East Asian Observatory
United States, Hilo
James Clerk Maxwell Telescope Jcmt
Honma, Mareki
Unknown Affiliation
Huang, Chih Wei Locutus
Taiwan, Nankang
Academia Sinica Taiwan
Huang, Lei
Unknown Affiliation
Hughes, David H.
Unknown Affiliation
Ikeda, Shiro
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Impellizzeri, Caterina M.Violette
Unknown Affiliation
Inoue, Makoto
Taiwan, Nankang
Academia Sinica Taiwan
Issaoun, Sara
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
James, David J.
Unknown Affiliation
Jeter, Britton
Taiwan, Nankang
Academia Sinica Taiwan
Jiang, Wu
Unknown Affiliation
Jiménez-Rosales, Alejandra
Netherlands, Nijmegen
Radboud Universiteit
Jorstad, Svetlana G.
Unknown Affiliation
Joshi, Abhishek V.
United States, Urbana
University of Illinois Urbana-champaign
Jung, Taehyun
Unknown Affiliation
Karami, Mansour
Canada, Waterloo
Perimeter Institute for Theoretical Physics
Canada, Waterloo
University of Waterloo
Karuppusamy, Ramesh
Germany, Bonn
Max Planck Institute for Radio Astronomy
Kawashima, Tomohisa
Unknown Affiliation
Keating, Garrett K.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Kettenis, Mark M.
Unknown Affiliation
Kim, Dongjin
Germany, Bonn
Max Planck Institute for Radio Astronomy
Kim, Jae-young
Germany, Bonn
Max Planck Institute for Radio Astronomy
Kim, Jongsoo
Unknown Affiliation
Kim, Junhan
United States, Pasadena
California Institute of Technology
Kino, Motoki
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Koay, J. Y.
Taiwan, Nankang
Academia Sinica Taiwan
Kocherlakota, Prashant
Unknown Affiliation
Kofuji, Yutaro
Unknown Affiliation
Koch, Patrick Michel
Taiwan, Nankang
Academia Sinica Taiwan
Koyama, Shoko
Taiwan, Nankang
Academia Sinica Taiwan
Kramer, Carsten
Unknown Affiliation
Kramer, Michael
Germany, Bonn
Max Planck Institute for Radio Astronomy
Krichbaum, Thomas P.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Kuo, Chengyu
Taiwan, Nankang
Academia Sinica Taiwan
Lauer, Tod R.
Unknown Affiliation
Lee, Daeyoung
United States, Urbana
University of Illinois Urbana-champaign
Lee, Sang-sung
Unknown Affiliation
Levis, Aviad
United States, Pasadena
California Institute of Technology
Li, Zhiyuan
Unknown Affiliation
Lico, Rocco
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Lindqvist, Michael
Sweden, Gothenburg
Chalmers University of Technology
Lisakov, Mikhail M.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Liu, Jun
Germany, Bonn
Max Planck Institute for Radio Astronomy
Liu, Kuo
Germany, Bonn
Max Planck Institute for Radio Astronomy
Liuzzo, Elisabetta
Unknown Affiliation
Lo, Wenping
Taiwan, Nankang
Academia Sinica Taiwan
Lobanov, Andreï P.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Loinard, Laurent
Unknown Affiliation
Lonsdale, Colin J.
United States, Westford
Mit Haystack Observatory
Lowitz, Amy E.
United States, Tucson
The University of Arizona
Lu, Rusen
Germany, Bonn
Max Planck Institute for Radio Astronomy
MacDonald, Nicholas Roy
Germany, Bonn
Max Planck Institute for Radio Astronomy
Mao, Jirong
Unknown Affiliation
Marchili, Nicola
Germany, Bonn
Max Planck Institute for Radio Astronomy
Markoff, Sera B.
Unknown Affiliation
Marrone, Daniel P.
United States, Tucson
The University of Arizona
Marscher, Alan P.
Unknown Affiliation
Marti-Vidal, Ivan
Spain, Valencia
Universitat de València
Matsushita, Satoki
Taiwan, Nankang
Academia Sinica Taiwan
Matthews, Lynn D.
United States, Westford
Mit Haystack Observatory
Medeiros, Lia
Unknown Affiliation
Menten, Karlm M.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Michalik, Daniel
United States, Chicago
The University of Chicago
Mizuno, Yosuke
Unknown Affiliation
Moran, James M.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Moriyama, Kotaro
United States, Westford
Mit Haystack Observatory
Mos̈cibrodzka, Monika A.
Netherlands, Nijmegen
Radboud Universiteit
Mulaudzi, Wanga
Unknown Affiliation
Müller, Cornelia
Netherlands, Nijmegen
Radboud Universiteit
Germany, Bonn
Max Planck Institute for Radio Astronomy
Mus, Alejandro
Spain, Valencia
Universitat de València
Myserlis, Ioannis
Unknown Affiliation
Nadolski, Andrew
Unknown Affiliation
Nagai, Hiroshi
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Nagar, Neil M.
Unknown Affiliation
Narayan, Ramesh
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Natarajan, Iniyan
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Nathanail, Antonios
Unknown Affiliation
Neilsen, Joseph
Unknown Affiliation
Neri, Roberto
Unknown Affiliation
Ni, Chunchong
Canada, Waterloo
Perimeter Institute for Theoretical Physics
Canada, Waterloo
University of Waterloo
Noutsos, Aristeidis
Germany, Bonn
Max Planck Institute for Radio Astronomy
Nowak, Michael A.
Unknown Affiliation
Olivares Sánchez, H. R.
Netherlands, Nijmegen
Radboud Universiteit
Ortiz-León, Gisela N.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Oyama, Tomoaki
Unknown Affiliation
Özel, Feryal
Unknown Affiliation
Palumbo, Daniel C.M.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Parsons, Harriet A.L.
United States, Hilo
East Asian Observatory
United States, Hilo
James Clerk Maxwell Telescope Jcmt
Patel, Nimesh A.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Pen, Ue Li
Canada, Waterloo
Perimeter Institute for Theoretical Physics
Taiwan, Nankang
Academia Sinica Taiwan
Pesce, Dominic W.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Plambeck, Richard L.
Unknown Affiliation
Porth, Oliver
Unknown Affiliation
Prather, Ben S.
United States, Urbana
University of Illinois Urbana-champaign
Preciado-López, Jorge A.
Canada, Waterloo
Perimeter Institute for Theoretical Physics
Psaltis, Dimitrios
Unknown Affiliation
Pu, Hungyi
Taiwan, Nankang
Academia Sinica Taiwan
Ramakrishnan, Venkatessh
Unknown Affiliation
Rao, Ramprasad
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Rawlings, Mark G.
United States, Hilo
East Asian Observatory
United States, Hilo
James Clerk Maxwell Telescope Jcmt
Rezzolla, Luciano
Unknown Affiliation
Ricarte, Angelo
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Ripperda, Bart
Canada, Waterloo
Perimeter Institute for Theoretical Physics
Rogers, Alan E.E.
United States, Westford
Mit Haystack Observatory
Romero-Cañizales, Cristina
Taiwan, Nankang
Academia Sinica Taiwan
Ros, Eduardo
Germany, Bonn
Max Planck Institute for Radio Astronomy
Rygl, Kazi L.J.
Unknown Affiliation
Sánchez, Salvador
Unknown Affiliation
Sánchez-Argüelles, D. O.
Unknown Affiliation
Śanchez-Portal, Miguel
Unknown Affiliation
Sasada, Mahito
Unknown Affiliation
Satapathy, Kaushik
United States, Tucson
The University of Arizona
Savolainen, Tuomas K.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Schuster, Karl Friedrich
Unknown Affiliation
Shen, Zhiqiang
Unknown Affiliation
Small, Des
Unknown Affiliation
Sohn, Bongwon
Unknown Affiliation
Tazaki, Fumie
Unknown Affiliation
Tetarenko, Alexandra J.
Unknown Affiliation
Tiede, Paul
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Tilanus, Remo P.J.
Netherlands, Nijmegen
Radboud Universiteit
United States, Tucson
The University of Arizona
Torne, Pablo
Germany, Bonn
Max Planck Institute for Radio Astronomy
Traianou, Efthalia
Germany, Bonn
Max Planck Institute for Radio Astronomy
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Trippe, Sascha
Unknown Affiliation
Turk, Matthew J.
Unknown Affiliation
van Bemmel, Ilse M.
Unknown Affiliation
van Langevelde, Huib Jan
Unknown Affiliation
Vos, Jesse
Netherlands, Nijmegen
Radboud Universiteit
Wagner, Jan F.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Ward-Thompson, Derek
Unknown Affiliation
Weintroub, Jonathan
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
United States, Cambridge
Harvard University
Wharton, Robert S.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Wiik, Kaj J.
Unknown Affiliation
Witzel, Günther
Germany, Bonn
Max Planck Institute for Radio Astronomy
Wong, George N.
Unknown Affiliation
Yoon, Doosoo
Unknown Affiliation
Young, Kenneth H.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Younsi, Ziri
Unknown Affiliation
Yu, Wei
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Yuan, Yefei
Unknown Affiliation
Zhao, Guangyao
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Statistics
Authors: 234
Affiliations: 24
Identifiers
Doi:
10.3847/2041-8213/acff6f
ISSN:
20418205
Research Areas
Environmental