Broadband multi-wavelength properties of M87 during the 2018 EHT campaign including a very high energy flaring episode

Context. The nearby elliptical galaxy M87 contains one of only two supermassive black holes whose emission surrounding the event horizon has been imaged by the Event Horizon Telescope (EHT). In 2018, more than two dozen multi-wavelength (MWL) facilities (from radio to γ -ray energies) took part in the second M87 EHT campaign. Aims. The goal of this extensive MWL campaign was to better understand the physics of the accreting black hole M87*, the relationship between the inflow and inner jets, and the high-energy particle acceleration. Understanding the complex astrophysics is also a necessary first step towards performing further tests of general relativity. Methods. The MWL campaign took place in April 2018, overlapping with the EHT M87* observations. We present a new, contemporaneous spectral energy distribution (SED) ranging from radio to very high-energy (VHE) γ -rays as well as details of the individual observations and light curves. We also conducted phenomenological modelling to investigate the basic source properties. Results. We present the first VHE γ -ray flare from M87 detected since 2010. The flux above 350 GeV more than doubled within a period of ≈36 hours. We find that the X-ray flux is enhanced by about a factor of two compared to 2017, while the radio and millimetre core fluxes are consistent between 2017 and 2018. We detect evidence for a monotonically increasing jet position angle that corresponds to variations in the bright spot of the EHT image. Conclusions. Our results show the value of continued MWL monitoring together with precision imaging for addressing the origins of high-energy particle acceleration. While we cannot currently pinpoint the precise location where such acceleration takes place, the new VHE γ -ray flare already presents a challenge to simple one-zone leptonic emission model approaches, and it emphasises the need for combined image and spectral modelling.

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Journal
Astronomy and Astrophysics
Published
2024-09-19
DOI
https://doi.org/10.1051/0004-6361/202450497
Citations
24
Primary Topic
Astrophysics and Cosmic Phenomena
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article
Field-Weighted Citation Impact
15.83

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article

Broadband multi-wavelength properties of M87 during the 2018 EHT campaign including a very high energy flaring episode

Wanga Mulaudzi, M. Panter, Ben Prather, Dimitrios Psaltis et al.
24 citations
Astronomy and Astrophysics
Astrophysics and Cosmic Phenomena
15.83
article

Broadband multi-wavelength properties of M87 during the 2018 EHT campaign including a very high energy flaring episode

Wanga Mulaudzi, M. Panter, Ben Prather, Dimitrios Psaltis, I. Vovk, Chi‐kwan Chan, M. Martínez, P. Cristarella Orestano, Richard Anantua, Niccolò Di Lalla, Paul Yamaguchi, Federica Bradascio, Ru-Sen Lu, S. Funk, F. Leone, J. Sitarek, Alexander W. Raymond, L. Fortson, M. Krämer, Doosoo Yoon, R. Shang, Teresa Toscano, E. de Oña Wilhelmi, J. E. Carlstrom, Greg Lindahl, Michael Backes, George N. Wong, D. Sobczyńska, Lia Medeiros, Gopal Narayanan, Charles F. Gammie, K. Schmidt, Yuzhu Cui, Natalia Żywucka, S. Britzen, F. Schüßler, Dominic O. Chang, C. J. Lonsdale, Irene Burelli, T. Savolainen, Dominic W. Pesce, John Barrett, R. Mirzoyan, A. Domínguez, R. Takeishi, Antonio F. Fuentes, K. Wiik, Roman Gold, M. Persic, M. Kuss, A. Sharma, Monika Mościbrodzka, S. Einecke, M. Tluczykont, Angelo Ricarte, W. Hanlon, T. Njoh Ekoume, S. Mender, G. Grolleron, A. K. Talluri, Ignacio Ruiz, F. Leitl, C.E. McGrath, T. K. Kleiner, D. Ward–Thompson, Nicole M. Ford, N. Wang, E. Bissaldi, Y. 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Barres de Almeida, D. Horns, L. Salas, Paul Tiede, Yajie Yuan, Pouya M. Kouch, Sheperd S. Doeleman, Sera Markoff, Prashant Kocherlakota, M. A. Gurwell, Yoshinori Yonekura, Kamal Souccar, Igor Adriano de Oliveira Reis, Alessandro Montanari, E. Bernardini, Joseph Neilsen, Garrett K. Keating, F. Tavecchio, A. López-Oramas, R. Batzofin, K. L. J. Rygl, Shoichi Koyama, B. Khélifi, M. Splettstoesser, Dominique Broguière, F. Podobnik, J. Ryan, Helena X. Ren, R. Blundell, S. Cutini, B. A. Hess, Satoki Matsushita, R. Grau, Gunther Witzel, J. A. Barrio, R. Walter, S. Chandra, R. Marx, Jason Soohoo, Efthalia Traianou, Stefan Fröse, Hiroshi Nagai, E. Ruiz-Velasco, M. J. Millard, Ming‐Tang Chen, M. de Naurois, Marco Giliberti, A. Bautista, P. Goswami, H. M. Schutte, Bart Ripperda, M. Delfino, Patrick M. Koch, A. Acharyya, B. A. Benson, I. Batković, Salvador Sánchez, C. Gasbarra, Chaitanya Priyadarshi, Hiroki Okino, Buell T. Jannuzi, B. Rani, C. B. Adams, R. P. J. Tilanus, H. Kubo, G. Maneva, A. Mitchell, Lang Cui, Daniel P. Marrone, Alejandro Mus, Kaushik Satapathy, W. Kluźniak, Cristina Romero-Cañizales, Qifa Liu, Anne-Kathrin Baczko, G. D'Amico, Jorge Otero-Santos, A. Kundu, Kazuhiro Hada, Jonathan Mackey, Guang-Yao Zhao, E. Kasai, N. Korzoun, J. Aschersleben, Mark Kettenis, Jelena Strišković, M. Carretero-Castrillo, M. J. Lang, M. Lundy, E. Prandini, Wen-Ping Lo, Taehyun Jung, Peter Galison, L. Font, E. Lindfors, Bong-Won Sohn, A. Fattorini, D. Hadasch, E. Pueschel, M. Ribó, С. С. Савченко, R. A. Ong, V. Barbosa Martins, Juan Carlos Algaba, Ilse van Bemmel, E. Hays, Razieh Emami, Manuel Artero, I. Myserlis, S. Paiano, R. Bellazzini, Hung-Yi Pu, T. Kayanoki, Hope Boyce, T. Mizuno, Kazunori Akiyama, N. Sahakyan, Motoki Kino, Michael A. Nowak, F. Rieger, E. B. Fomalont, Per Friberg, Pak‐Leung Ho, S. Fegan, Shiro Ikeda, Vincent L. Fish, Andrew Chael, Olivier Gentaz, Joseph M. Michail, J. Damascene Mbarubucyeye, Noemi La Bella, Roger Deane, J. M. Paredes, T. 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Lenain, Daryl Haggard, Jan Wagner, K. Ragan, T. Aniello, Mark G. Rawlings, T. Bulik, Jaeheon Kim, Kiyoaki Wajima, Zekun Li, S. Germani, P. Fusco, Lei Huang, Irene Jiménez Martínez, Alessandro Levis, R. Karuppusamy, B. Bruno, M. E. Monzani, A. Berti, J. M. Miranda, Alejandro Cruz-Osorio, A. P. Lobanov, Koushik Chatterjee, Fabian Leuschner, Junghwan Oh, Dirk Heumann, M. Meyer, D. A. Williams, Nicholas S. Conroy, O. Vince, R. G. Lang, Masanori Nakamura, Keiichi Asada, A. A. Zdziarski, M. Strzys, Rohan Dahale, J. Schubert, I. Jung-Richardt, M. N. Johnson, M. Takahashi, Mislav Baloković, P. A. Caraveo, Chiara Righi, J. Besenrieder, L. Saha, Daniel R. van Rossum, Lukas Nickel, Satoko Sawada‐Satoh, Robert Wharton, A. Okumura, J. Kushida, Stefano Menchiari, M. Pihet, Elisabetta Liuzzo, R. Bonino, Oliver Porth, Lindy Blackburn, I. A. Grenier, K. Kosack, M. Peresano, Stefano Ansoldi, Tyler Trent, A. Quirrenbach, Y. Chen, Е. В. Кравченко, Yosuke Mizuno, L. A. Antonelli, V. Sahakian, Kotaro Niinuma, T. Wach, Nu. Komin, Aristomenis Yfantis, N. Mirabal, Sebastian Panny, Daniel C. M. Palumbo, A. Duerr, J. Baxter, G. Martí-Devesa, K. Nilsson, F. D'Ammando, Karim Sabri, J. Bernete, U. Pensec, E. Bronzini, A. Campoy-Ordaz, T. Gradetzke, Joshua S. Stanway, Xinhua Ma, Jae-Young Kim, Guanghui Li, Dong-Jin Kim, Xiang Liu, Hua Zhang, Zhong Chen, Shuo Zhang, Jongho Park, O. Reimer, A. Chen, Y. Suda, Ni Chen, J. I. Djuvsland, Wei Yu, Roberto Garcı́a, Hendrik Müller, Yukiho Kobayashi, Ruiyang Zhao, Marcos López, W. Jin, J. E. Conway, S. L. Wong, Z. Liu, S. Gasparyan, S. Nozaki, Juan Escudero, J. L. Christiansen, A. Zech, Satoshi Fukami, M. Pohl, Hiroyuki Suzuki, Alessandro De Angelis, A.J. Castro-Tirado, H. Alyson Ford, N. Giglietto, S. J. Wagner, C. Steppa, F. Aharonian, S. Mangano, R. López-Coto, M. Lemoine-Goumard, R. J. Garcı́a López, B. Li, P. G. Prada Moroni, A. Abhishek, H. Tajima, A. Donini, A. Morselli, G. Pirola, A. Lorini, D. Horan, F. Jankowsky, H. Salzmann, A. Reimer, R. Di Tria, P. Bruel, D. Berge, T. Miener, D. Paneque, J. Herrera Llorente, T. Schweizer, M. Holler, P. M. Saz Parkinson, P. Spinelli, Ł. Stawarz, E. Moulin, F. Dazzi, P. Da Vela, M. Bremer, Zhiqiu Huang, A. Hahn, M. Garczarczyk, A. E. Lowitz, J. Devin, J.-P. Ernenwein, W. Bednarek, T. Yamamoto, F. Ait Benkhali, G. H. Sembroski, C. van Eldik, T. Chand, T. Nakamori, E. Orlando, W. Zhong, M. Vazquez Acosta, Karl Mannheim, Stefano Truzzi, K. M. Menten, J. F. Glicenstein, Anthony C. Jones, Qingwen Wu, J. Rico, J. L. Gómez, P. F. Michelson, E. Roache, G. Pühlhofer, P. O'Brien, R. D. Blandford, F. Krennrich, F. Yuan, D. Hrupec, M. Teshima, A. Moralejo, D. H. Hughes, S. Ohm, A. Dmytriiev, S. Maldera, S. Larsson, F. Di Pierro, O. Hervet, B. De Lotto, T. Saito, A. Carosi, F. Peter Schloerb, A. P. Marscher, C. Müller, H. Olivares, J. A. Zensus, G. Ceribella, A. Lemière, J. Becerra González, Lynn D. Matthews, G. Principe, A. Lamastra, C Nigro, A. Spolon, D. Strom, L. Haerer, W. Alef, F. Schmuckermaier, I. Agudo, L. Di Venere, S. Abe, Y. Chai, Yutaro Kofuji, A. Arbet Engels, A. Roy, S. Ubach, P. Majumdar, Junhan Kim, F. Longo, M. Sasaki, H. Sol, W. Rhode, A. Babić, Dan Bintley, K. Nishijima, Aleksandar PopStefanija, I. Viale, G. Busetto, K. Noda, R. Cecil, G. Zaharijas, F. Giordano, M. Zacharias, Rocco Lico, M. Kertzman, K. Ishio, M. N. Mazziotta, R. Paoletti, O. Blanch, B. Machado de Oliveira Fraga, M. Sánchez-Conde, A. Biland, A. V. Joshi, S. Gabici, M. Ostrowski, Z. Shen, M. Makariev, M. Ruth Lavergne, M. Bouyahiaoui, M. O. Moghadam, V. V. Vassiliev, T. Kawashima, V. Piétu, S. Pita, D. J. Suson, L. Rezzolla, Nitika Yadlapalli, K. Streil, A. Dinesh, M. Martínez-Chicharro, D. Dorner, M. D. Johnson, M. Böttcher, A. M. Taylor, Marcos Santander, S. G. Jorstad, D. Kerszberg, K. Katarzyński, L. Nikolić, J. Mao, Jianping Wang, Craig Sheridan, Jun Yi Koay, Abhishek V. Joshi, Xiaopeng Cheng
article en
24 citations

Abstract

Context. The nearby elliptical galaxy M87 contains one of only two supermassive black holes whose emission surrounding the event horizon has been imaged by the Event Horizon Telescope (EHT). In 2018, more than two dozen multi-wavelength (MWL) facilities (from radio to γ -ray energies) took part in the second M87 EHT campaign. Aims. The goal of this extensive MWL campaign was to better understand the physics of the accreting black hole M87*, the relationship between the inflow and inner jets, and the high-energy particle acceleration. Understanding the complex astrophysics is also a necessary first step towards performing further tests of general relativity. Methods. The MWL campaign took place in April 2018, overlapping with the EHT M87* observations. We present a new, contemporaneous spectral energy distribution (SED) ranging from radio to very high-energy (VHE) γ -rays as well as details of the individual observations and light curves. We also conducted phenomenological modelling to investigate the basic source properties. Results. We present the first VHE γ -ray flare from M87 detected since 2010. The flux above 350 GeV more than doubled within a period of ≈36 hours. We find that the X-ray flux is enhanced by about a factor of two compared to 2017, while the radio and millimetre core fluxes are consistent between 2017 and 2018. We detect evidence for a monotonically increasing jet position angle that corresponds to variations in the bright spot of the EHT image. Conclusions. Our results show the value of continued MWL monitoring together with precision imaging for addressing the origins of high-energy particle acceleration. While we cannot currently pinpoint the precise location where such acceleration takes place, the new VHE γ -ray flare already presents a challenge to simple one-zone leptonic emission model approaches, and it emphasises the need for combined image and spectral modelling.

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di Fisica Nucleare, Sezione di Perugia (IT), National Astronomical Observatories (CN), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (ES), Yamagata University Hospital (JP), Dartmouth Hospital (GB), Flatiron Institute (US), University of Bergen (NO), The University of Texas at San Antonio (US), University of Warsaw (PL), McGill University (CA), University of Turin (IT), The University of Adelaide (AU), Nagoya University (JP), Ibaraki University (JP), Oulu University of Applied Sciences (FI), Universidad Autónoma de Madrid (ES), Chalmers University of Technology (SE), University of West Alabama (US), Brandeis University (US), University of Pretoria (ZA), Niigata University (JP), Columbia University (US), Villanova University (US), University of Maryland, Baltimore County (US), Clemson University (US), State University of New York at Potsdam (US), Academia Sinica (TW), Heidelberg University (US), University of Delaware (US), KTH Royal Institute of Technology (SE), Michigan State University (US), National Institute for Astrophysics (IT), Korea Institute of Science & Technology Information (KR), Ruhr University Bochum (DE), Netherlands Institute for Radio Astronomy (NL), University of Split (HR), Stanford University (US), University of Oulu (FI), Barnard College (US), Aalto University (FI)
National Science Foundation, Smithsonian Institution, U.S. Department of Energy, National Aeronautics and Space Administration, John Templeton Foundation, Gordon and Betty Moore Foundation, Harvard University, National Center for Theoretical Sciences, Space Telescope Science Institute, Ministerio de Ciencia, Innovación y Universidades, National Radio Astronomy Observatory, Associated Universities, National Energy Research Scientific Computing Center, International Max Planck Research School for Environmental, Cellular and Molecular Microbiology, Joint Institute for Computational Fundamental Science, Flatiron Health, Government of Canada, Leverhulme Trust, European Commission, National Research Foundation, University of Pretoria, Deutsche Forschungsgemeinschaft, Ministry of Education, Culture, Sports, Science and Technology, Canada Research Chairs, Fundação de Amparo à Pesquisa do Estado de São Paulo, National Natural Science Foundation of China, Academia Sinica, Chinese Academy of Sciences, China Postdoctoral Science Foundation, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, Generalitat Valenciana, Nuclear Safety and Security Commission, Korea Astronomy and Space Science Institute, National Research Foundation of Korea, Max-Planck-Gesellschaft, Vetenskapsrådet, Ministry of Education, India, China Scholarship Council, European Southern Observatory, Ministerio de Ciencia e Innovación, Universidad Nacional Autónoma de México, National Astronomical Observatory of Japan, Junta de Andalucía, Istituto Nazionale di Fisica Nucleare, Ministry of Science and ICT, South Korea, Fundación Bancaria Caixa d'Estalvis i Pensions de Barcelona, Instituto de Astrofísica de Andalucía, Agencia Nacional de Investigación y Desarrollo, National Science and Technology Council, Institut Périmètre de physique théorique, East Asian Core Observatories Association, Toray Science Foundation, Office of Science, National Nuclear Security Administration, Physics Division, National Center for Theoretical Sciences, Natural Sciences and Engineering Research Council of Canada, Science and Technology Facilities Council, Japan Society for the Promotion of Science, Consejo Superior de Investigaciones Científicas, Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México, National Institutes of Natural Sciences, Agencia Estatal de Investigación, National Key Research and Development Program of China, National Science Fund for Distinguished Young Scholars, Office of International Science and Engineering, High Energy Physics, Oak Ridge National Laboratory, Los Alamos National Laboratory
Affordable and clean energy
Openalex Percentile: Top 1%
Astrophysics and Cosmic Phenomena
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