Constraints on black-hole charges with the 2017 EHT observations of M87*

@article{Kocherlakota2021ConstraintsOB,
  title={Constraints on black-hole charges with the 2017 EHT observations of M87*},
  author={Prashant Kocherlakota and Luciano Rezzolla and Heino Falcke and Christian M. Fromm and Michael Kramer and Yosuke Mizuno and Antonios Nathanail and H{\'e}ctor Olivares and Ziri Younsi and Kazunori Akiyama and Antxon Alberdi and Walter Alef and Juan Carlos Algaba and Richard Anantua and Keiichi Asada and Rebecca Azulay and Anne-Kathrin Baczko and David Ball and Mislav Balokovi{\'c} and John Barrett and Bradford A. Benson and Dan Bintley and Lindy Blackburn and Raymond Blundell and Wilfred Boland and Katherine L. Bouman and Geoffrey C. Bower and Hope Boyce and Michael Bremer and Christiaan D. Brinkerink and Roger Brissenden and Silke Britzen and Avery E. Broderick and Dominique Broguiere and Thomas Bronzwaer and Do-Young Byun and John E. Carlstrom and Andrew A. Chael and Chi-kwan Chan and Shami Chatterjee and Koushik Chatterjee and Ming-Tang Chen and Yongjun Chen and Paul M. Chesler and Ilje Cho and Pierre Christian and John E. Conway and James M. Cordes and Thomas M. Crawford and Geoffrey B. Crew and Alejandro Cruz-Osorio and Yuzhu Cui and Jordy Davelaar and Mariafelicia De Laurentis and Roger Deane and Jessica Dempsey and Gregory Desvignes and Sheperd S. Doeleman and Ralph P. Eatough and Joseph R. Farah and Vincent L. Fish and Edward B. Fomalont and Raquel Fraga-Encinas and Per Friberg and Heather A. Ford and Antonio Fuentes and Peter Galison and Charles F. Gammie and Roberto Garc{\'i}a and Olivier Gentaz and Boris Georgiev and Ciriaco Goddi and Roman Gold and Jos{\'e} L. G{\'o}mez and Arturo I. G{\'o}mez-Ruiz and Minfeng Gu and Mark A. Gurwell and Kazuhiro Hada and Daryl Haggard and Michael H. Hecht and Ronald Hesper and Luis C. Ho and Paul T. P. Ho and Mareki Honma and Chih-Wei L. Huang and Lei Huang and David H. Hughes and Shiro Ikeda and Makoto Inoue and Sara Issaoun and David J. James and Buell T. Jannuzi and Michael Janssen and Britton Jeter and Wu Jiang and Alejandra Jim{\'e}nez-Rosales and Michael D. Johnson and Svetlana G. Jorstad and Taehyun Jung and Mansour Karami and Ramesh Karuppusamy and Tomohisa Kawashima and Garrett K. Keating and Mark Kettenis and Dong-Jin Kim and Jae-Young Kim and Jongsoo Kim and Junhan Kim and Motoki Kino and Jun Yi Koay and Yutaro Kofuji and Patrick M. Koch and Shoko Koyama and Carsten Kramer and Thomas P. Krichbaum and Cheng-Yu Kuo and Tod R. Lauer and Sang-Sung Lee and Aviad Levis and Yan-Rong Li and Zhiyuan Li and Michael Lindqvist and Rocco Lico and Greg Lindahl and Jun Liu and Kuo Liu and Elisabetta Liuzzo and Wen-Ping Lo and Andrei P. Lobanov and Laurent Loinard and Colin J. Lonsdale and Ruohan Lu and Nicholas R. MacDonald and Jirong Mao and Nicola Marchili and Sera B. Markoff and Daniel P. Marrone and Alan P. Marscher and Iv{\'a}n Mart{\'i}-Vidal and Satoki Matsushita and Lynn D. Matthews and Lia Medeiros and Karl M. Menten and Izumi Mizuno and James M. Moran and Kotaro Moriyama and Monika Mościbrodzka and Cornelia M{\"u}ller and Gibwa Musoke and Alejandro Mus Mej{\'i}as and Hiroshi Nagai and Neil M. Nagar and Masanori Nakamura and Ramesh Narayan and Gopal Narayanan and Iniyan Natarajan and Joey Neilsen and Roberto Neri and Chunchong Ni and Aristeidis Noutsos and Michael A. Nowak and Hiroki Okino and Gisela N. Ortiz-Le{\'o}n and Tomoaki Oyama and Feryal {\"O}zel and Daniel C. M. Palumbo and Jongho Park and Nimesh Patel and Ue-li Pen and Dominic W. Pesce and Vincent Pi{\'e}tu and Richard Plambeck and Aleksandar PopStefanija and Oliver Porth and Felix M. P{\"o}tzl and Ben S. Prather and Jorge A. Preciado-L{\'o}pez and Dimitrios Psaltis and Hung-Yi Pu and Venkatessh Ramakrishnan and Ramprasad Rao and Mark G. Rawlings and Alexander W. Raymond and Angelo Ricarte and Bart Ripperda and Freek Roelofs and Alan E. E. Rogers and Eduardo Ros and Mel Rose and Arash Roshanineshat and Helge Rottmann and Alan L. Roy and Chester A. Ruszczyk and Kazi L. J. Rygl and Salvador S{\'a}nchez and David S{\'a}nchez-Arguelles and Mahito Sasada and Tuomas Savolainen and F. P. Schloerb and Karl F. Schuster and Lijing Shao and Zhi-xia Shen and Des Small and Bong Won Sohn and Jason SooHoo and He Sun and Fumie Tazaki and Alexandra J. Tetarenko and Paul Tiede and Remo P. J. Tilanus and Michael Titus and Kenji Toma and Pablo Torne and Tyler Trent and Efthalia Traianou and Sascha Trippe and I. M. van Bemmel and Huib Jan van Langevelde and Daniel R. van Rossum and Jan Wagner and Derek Ward-Thompson and J. F. C. Wardle and Jonathan Weintroub and Norbert Wex and Robert S. Wharton and Maciek Wielgus and George N. Wong and Qingwen Wu and Doosoo Yoon and Andr{\'e} Young and Ken Young and Feng Yuan and Ye-Fei Yuan and J. Anton Zensus and Guangyao Zhao and Shan-Shan Zhao},
  journal={Physical Review D},
  year={2021},
  volume={103}
}
Our understanding of strong gravity near supermassive compact objects has recently improved thanks to the measurements made by the Event Horizon Telescope (EHT). We use here the M87* shadow size to infer constraints on the physical charges of a large variety of nonrotating or rotating black holes. For example, we show that the quality of the measurements is already sufficient to rule out that M87* is a highly charged dilaton black hole. Similarly, when considering black holes with two physical… 

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