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Selective Dynamical Imaging of Interferometric Data

Joseph Farah Peter Galison Kazunori Akiyama Katherine L. Bouman Geoffrey C. Bower Andrew Chael Antonio Fuentes José L. Gómez Mareki Honma Michael D. Johnson Yutaro Kofuji Daniel P. Marrone Kotaro Moriyama Ramesh Narayan Dominic W. Pesce Paul Tiede Maciek Wielgus Guang-Yao Zhao Antxon Alberdi Walter Alef Juan Carlos Algaba Richard Anantua Keiichi Asada Rebecca Azulay Anne-Kathrin Baczko David Ball Mislav Baloković John Barrett Bradford A. Benson Dan Bintley Lindy Blackburn Raymond Blundell Wilfred Boland Hope Boyce Michael Bremer Christiaan D. Brinkerink Roger Brissenden Silke Britzen Avery E. Broderick Dominique Broguiere Thomas Bronzwaer Sandra Bustamente Do-Young Byun John E. Carlstrom Chi-Kwan Chan Koushik Chatterjee Shami Chatterjee Ming-Tang Chen Yongjun Chen Ilje Cho Pierre Christian John E. Conway James M. Cordes Thomas M. Crawford Geoffrey B. Crew Alejandro Cruz-Osorio Yuzhu Cui Jordy Davelaar Mariafelicia de Laurentis Roger Deane Jessica Dempsey Gregory Desvignes 1 Sheperd S. Doeleman Ralph P. Eatough Heino Falcke Vincent L. Fish Ed Fomalont H. Alyson Ford Raquel Fraga-Encinas Per Friberg Christian M. Fromm Charles F. Gammie Roberto Garc'A Olivier Gentaz Ciriaco Goddi Roman Gold Arturo I. Gómez-Ruiz Minfeng Gu Mark Gurwell Kazuhiro Hada Daryl Haggard Michael H. Hecht Ronald Hesper Luis C. Ho Paul Ho Chih-Wei L. Huang Lei Huang David H. Hughes Shiro Ikeda Makoto Inoue Sara Issaoun David J. James Buell T. Jannuzi Michael Janssen Britton Jeter Wu Jiang Alejandra Jimenez-Rosales Svetlana Jorstad Taehyun Jung Mansour Karami Ramesh Karuppusamy Tomohisa Kawashima Garrett K. Keating Mark Kettenis Dong-Jin Kim Jae-Young Kim Jongsoo Kim Junhan Kim Motoki Kino Jun Yi Koay Patrick M. Koch Shoko Koyama Carsten Kramer Michael Kramer Thomas P. Krichbaum Cheng-Yu Kuo Tod R. Lauer Sang-Sung Lee Aviad Levis Yan-Rong Li Zhiyuan Li Rocco Lico Greg Lindahl Michael Lindqvist Jun Liu Kuo Liu Elisabetta Liuzzo Wen-Ping Lo Andrei P. Lobanov Laurent Loinard Colin Lonsdale Ru-Sen Lu Nicholas R. Macdonald Jirong Mao Nicola Marchili Sera Markoff Alan P. Marscher Iván Martí-Vidal Satoki Matsushita Lynn D. Matthews Lia Medeiros Karl M. Menten Izumi Mizuno Yosuke Mizuno James M. Moran Monika Moscibrodzka Cornelia Müller Alejandro Mus Mejas Gibwa Musoke Hiroshi Nagai Neil M. Nagar Masanori Nakamura Gopal Narayanan Iniyan Natarajan Antonios Nathanail Joey Neilsen Roberto Neri Chunchong Ni Aristeidis Noutsos Michael A. Nowak Hiroki Okino Héctor Olivares Gisela N. Ortiz-León Tomoaki Oyama Feryal Zel Daniel C. M. Palumbo Jongho Park Nimesh Patel Ue-Li Pen Vincent Piétu Richard Plambeck Aleksandar Popstefanija Oliver Porth Felix M. Pötzl Ben Prather Jorge A. Preciado-López Dimitrios Psaltis Hung-Yi Pu Venkatessh Ramakrishnan Ramprasad Rao Mark G. Rawlings Alexander W. Raymond Luciano Rezzolla Bart Ripperda Freek Roelofs Alan Rogers Eduardo Ros Mel Rose Arash Roshanineshat Helge Rottmann Alan L. Roy Chet Ruszczyk Kazi L. J. Rygl Salvador Sánchez David Sánchez-Arguelles Mahito Sasada Tuomas Savolainen F. Peter Schloerb Karl-Friedrich Schuster Lijing Shao Zhiqiang Shen Des Small Bong Won Sohn Jason Soohoo He Sun Fumie Tazaki Alexandra J. Tetarenko Remo P. J. Tilanus Michael Titus Kenji Toma Pablo Torne Efthalia Traianou Tyler Trent Sascha Trippe Ilse van Bemmel Huib Jan van Langevelde Daniel R. van Rossum Jan Wagner Derek Ward-Thompson John Wardle Jonathan Weintroub Norbert Wex Robert Wharton Kaj Wiik George N. Wong Qingwen Wu Doosoo Yoon André Young Ken Young Ziri Younsi Feng Yuan Ye-Fei Yuan J. Anton Zensus Shan-Shan Zhao 
Abstract : Recent developments in very long baseline interferometry (VLBI) have made it possible for the Event Horizon Telescope (EHT) to resolve the innermost accretion flows of the largest supermassive black holes on the sky. The sparse nature of the EHT's (u, v)-coverage presents a challenge when attempting to resolve highly time-variable sources. We demonstrate that the changing (u, v)-coverage of the EHT can contain regions of time over the course of a single observation that facilitate dynamical imaging. These optimal time regions typically have projected baseline distributions that are approximately angularly isotropic and radially homogeneous. We derive a metric of coverage quality based on baseline isotropy and density that is capable of ranking array configurations by their ability to produce accurate dynamical reconstructions. We compare this metric to existing metrics in the literature and investigate their utility by performing dynamical reconstructions on synthetic data from simulated EHT observations of sources with simple orbital variability. We then use these results to make recommendations for imaging the 2017 EHT Sgr A* data set.
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Submitted on : Monday, July 4, 2022 - 4:05:37 PM
Last modification on : Friday, August 5, 2022 - 12:00:56 PM

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Joseph Farah, Peter Galison, Kazunori Akiyama, Katherine L. Bouman, Geoffrey C. Bower, et al.. Selective Dynamical Imaging of Interferometric Data. The Astrophysical Journal Letters, 2022, 930, ⟨10.3847/2041-8213/ac6615⟩. ⟨insu-03713310⟩

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