Comparison of Polarized Radiative Transfer Codes used by the EHT Collaboration
Creators: name: Prather, Ben S.
name: Dexter, Jason
name: Moscibrodzka, Monika
name: Pu, Hung-Yi
name: Bronzwaer, Thomas
name: Davelaar, Jordy
name: Younsi, Ziri
name: Gammie, Charles F.
name: Gold, Roman
name: Wong, George N.
name: Akiyama, Kazunori
name: Alberdi, Antxon
name: Alef, Walter
name: Algaba, Juan Carlos
name: Anantua, Richard
name: Asada, Keiichi
name: Azulay, Rebecca
name: Bach, Uwe
name: Baczko, Anne-Kathrin
name: Ball, David
name: Baloković, Mislav
name: Barrett, John
name: Bauböck, Michi
name: Benson, Bradford A.
name: Bintley, Dan
name: Blackburn, Lindy
name: Blundell, Raymond
name: Bouman, Katherine L.
name: Bower, Geoffrey C.
name: Boyce, Hope
name: Bremer, Michael
name: Brinkerink, Christiaan D.
name: Brissenden, Roger
name: Britzen, Silke
name: Broderick, Avery E.
name: Broguiere, Dominique
name: Bustamante, Sandra
name: Byun, Do-Young
name: Carlstrom, John E.
name: Ceccobello, Chiara
name: Chael, Andrew
name: Chan, Chi-kwan
name: Chang, Dominic O.
name: Chatterjee, Koushik
name: Chatterjee, Shami
name: Chen, Ming-Tang
name: Chen, Yongjun
name: Cheng, Xiaopeng
name: Cho, Ilje
name: Christian, Pierre
name: Conroy, Nicholas S.
name: Conway, John E.
name: Cordes, James M.
name: Crawford, Thomas M.
name: Crew, Geoffrey B.
name: Cruz-Osorio, Alejandro
name: Cui, Yuzhu
name: De Laurentis, Mariafelicia
name: Deane, Roger
name: Dempsey, Jessica
name: Desvignes, Gregory
name: Dhruv, Vedant
name: Doeleman, Sheperd S.
name: Dougal, Sean
name: Dzib, Sergio A.
name: Eatough, Ralph P.
name: Emami, Razieh
name: Falcke, Heino
name: Farah, Joseph
name: Fish, Vincent L.
name: Fomalont, Ed
name: Ford, H. Alyson
name: Fraga-Encinas, Raquel
name: Freeman, William T.
name: Friberg, Per
name: Fromm, Christian M.
name: Fuentes, Antonio
name: Galison, Peter
name: García, Roberto
name: Gentaz, Olivier
name: Georgiev, Boris
name: Goddi, Ciriaco
name: Gómez-Ruiz, Arturo I.
name: Gómez, José L.
name: Gu, Minfeng
name: Gurwell, Mark
name: Hada, Kazuhiro
name: Haggard, Daryl
name: Haworth, Kari
name: Hecht, Michael H.
name: Hesper, Ronald
name: Heumann, Dirk
name: Ho, Luis C.
name: Ho, Paul
name: Honma, Mareki
name: Huang, Chih-Wei L.
name: Huang, Lei
name: Hughes, David H.
name: Ikeda, Shiro
name: Impellizzeri, C. M. Violette
name: Inoue, Makoto
name: Issaoun, Sara
name: James, David J.
name: Jannuzi, Buell T.
name: Janssen, Michael
name: Jeter, Britton
name: Jiang, Wu
name: Jiménez-Rosales, Alejandra
name: Johnson, Michael D.
name: Jorstad, Svetlana
name: Joshi, Abhishek V.
name: Jung, Taehyun
name: Karami, Mansour
name: Karuppusamy, Ramesh
name: Kawashima, Tomohisa
name: Keating, Garrett K.
name: Kettenis, Mark
name: Kim, Dong-Jin
name: Kim, Jae-Young
name: Kim, Jongsoo
name: Kim, Junhan
name: Kino, Motoki
name: Koay, Jun Yi
name: Kocherlakota, Prashant
name: Kofuji, Yutaro
name: Koyama, Shoko
name: Kramer, Carsten
name: Kramer, Michael
name: Krichbaum, Thomas P.
name: Kuo, Cheng-Yu
name: La Bella, Noemi
name: Lauer, Tod R.
name: Lee, Daeyoung
name: Lee, Sang-Sung
name: Leung, Po Kin
name: Levis, Aviad
name: Li, Zhiyuan
name: Lico, Rocco
name: Lindahl, Greg
name: Lindqvist, Michael
name: Lisakov, Mikhail
name: Liu, Jun
name: Liu, Kuo
name: Liuzzo, Elisabetta
name: Lo, Wen-Ping
name: Lobanov, Andrei P.
name: Loinard, Laurent
name: Lonsdale, Colin J.
name: Lu, Ru-Sen
name: MacDonald, Nicholas R.
name: Mao, Jirong
name: Marchili, Nicola
name: Markoff, Sera
name: Marrone, Daniel P.
name: Marscher, Alan P.
name: Martí-Vidal, Iván
name: Matsushita, Satoki
name: Matthews, Lynn D.
name: Medeiros, Lia
name: Menten, Karl M.
name: Michalik, Daniel
name: Mizuno, Izumi
name: Mizuno, Yosuke
name: Moran, James M.
name: Moriyama, Kotaro
name: Müller, Cornelia
name: Mus, Alejandro
name: Musoke, Gibwa
name: Myserlis, Ioannis
name: Nadolski, Andrew
name: Nagai, Hiroshi
name: Nagar, Neil M.
name: Nakamura, Masanori
name: Narayan, Ramesh
name: Narayanan, Gopal
name: Natarajan, Iniyan
name: Nathanail, Antonios
name: Fuentes, Santiago Navarro
name: Neilsen, Joey
name: Neri, Roberto
name: Ni, Chunchong
name: Noutsos, Aristeidis
name: Nowak, Michael A.
name: Oh, Junghwan
name: Okino, Hiroki
name: Olivares, Héctor
name: Ortiz-León, Gisela N.
name: Oyama, Tomoaki
name: Özel, Feryal
name: Palumbo, Daniel C. M.
name: Paraschos, Georgios Filippos
name: Park, Jongho
name: Parsons, Harriet
name: Patel, Nimesh
name: Pen, Ue-Li
name: Pesce, Dominic W.
name: Piétu, Vincent
name: Plambeck, Richard
name: PopStefanija, Aleksandar
name: Porth, Oliver
name: Pötzl, Felix M.
name: Preciado-López, Jorge A.
name: Psaltis, Dimitrios
name: Ramakrishnan, Venkatessh
name: Rao, Ramprasad
name: Rawlings, Mark G.
name: Raymond, Alexander W.
name: Rezzolla, Luciano
name: Ricarte, Angelo
name: Ripperda, Bart
name: Roelofs, Freek
name: Rogers, Alan
name: Ros, Eduardo
name: Romero-Cañizales, Cristina
name: Roshanineshat, Arash
name: Rottmann, Helge
name: Roy, Alan L.
name: Ruiz, Ignacio
name: Ruszczyk, Chet
name: Rygl, Kazi L. J.
name: Sánchez, Salvador
name: Sánchez-Argüelles, David
name: Sánchez-Portal, Miguel
name: Sasada, Mahito
name: Satapathy, Kaushik
name: Savolainen, Tuomas
name: Schloerb, F. Peter
name: Schonfeld, Jonathan
name: Schuster, Karl-Friedrich
name: Shao, Lijing
name: Shen, Zhiqiang
name: Small, Des
name: Sohn, Bong Won
name: SooHoo, Jason
name: Souccar, Kamal
name: Sun, He
name: Tazaki, Fumie
name: Tetarenko, Alexandra J.
name: Tiede, Paul
name: Tilanus, Remo P. J.
name: Titus, Michael
name: Torne, Pablo
name: Traianou, Efthalia
name: Trent, Tyler
name: Trippe, Sascha
name: Turk, Matthew
name: van Bemmel, Ilse
name: van Langevelde, Huib Jan
name: van Rossum, Daniel R.
name: Vos, Jesse
name: Wagner, Jan
name: Ward-Thompson, Derek
name: Wardle, John
name: Weintroub, Jonathan
name: Wex, Norbert
name: Wharton, Robert
name: Wielgus, Maciek
name: Wiik, Kaj
name: Witzel, Gunther
name: Wondrak, Michael F.
name: Wu, Qingwen
name: Yamaguchi, Paul
name: Yfantis, Aristomenis
name: Yoon, Doosoo
name: Young, André
name: Young, Ken
name: Yu, Wei
name: Yuan, Feng
name: Yuan, Ye-Fei
name: Zensus, J. Anton
name: Zhang, Shuo
name: Zhao, Guang-Yao
name: Zhao, Shan-Shan
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Interpretation of resolved polarized images of black holes by the Event Horizon Telescope (EHT) requires predictions of the polarized emission observable by an Earth-based instrument for a particular model of the black hole accretion system. Such predictions are generated by general relativistic radiative transfer (GRRT) codes, which integrate the equations of polarized radiative transfer in curved spacetime. A selection of ray-tracing GRRT codes used within the EHT collaboration is evaluated for accuracy and consistency in producing a selection of test images, demonstrating that the various methods and implementations of radiative transfer calculations are highly consistent. When imaging an analytic accretion model, we find that all codes produce images similar within a pixel-wise normalized mean squared error (NMSE) of 0.012 in the worst case. When imaging a snapshot from a cell-based magnetohydrodynamic simulation, we find all test images to be similar within NMSEs of 0.02, 0.04, 0.04, and 0.12 in Stokes I, Q, U , and V respectively. We additionally find the values of several image metrics relevant to published EHT results to be in agreement to much better precision than measurement uncertainties.
description: Accepted for publication in ApJ