Curvature in the very-high energy gamma-ray spectrum of M 87

The radio galaxy M 87 is a variable very-high energy (VHE) gamma-ray source, exhibiting three major flares, which were reported in 2005, 2008, and 2010. Despite extensive studies, the origin of the VHE gamma-ray emission is not yet fully understood. In this study, we investigate the VHE gamma-ray sp...

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Main Authors:	Aharonian, Felix A. (Author) , Ait Benkhali, Faical (Author) , Aschersleben, J. (Author) , Ashkar, H. (Author) , Backes, M. (Author) , Martins, V. Barbosa (Author) , Batzofin, R. (Author) , Becherini, Y. (Author) , Berge, D. (Author) , Bernlöhr, Konrad (Author) , Böttcher, M. (Author) , Boisson, C. (Author) , Bolmont, J. (Author) , Lavergne, M. de Bony de (Author) , Bradascio, F. (Author) , Brose, R. (Author) , Brun, F. (Author) , Bruno, B. (Author) , Bulik, T. (Author) , Burger-Scheidlin, C. (Author) , Bylund, T. (Author) , Casanova, S. (Author) , Cecil, R. (Author) , Celic, J. (Author) , Cerruti, M. (Author) , Chand, T. (Author) , Chandra, S. (Author) , Chen, A. (Author) , Chibueze, J. (Author) , Chibueze, O. (Author) , Collins, T. (Author) , Cotter, G. (Author) , Mbarubucyeye, J. Damascene (Author) , Djannati-Ataï, A. (Author) , Djuvsland, Julia Isabell (Author) , Dmytriiev, A. (Author) , Egberts, K. (Author) , Einecke, S. (Author) , Fegan, S. (Author) , Fontaine, G. (Author) , Funk, S. (Author) , Gabici, S. (Author) , Glicenstein, J. F. (Author) , Glombitza, J. (Author) , Grolleron, G. (Author) , Haerer, L. (Author) , Hofmann, Werner (Author) , Holch, T. L. (Author) , Holler, M. (Author) , Horns, D. (Author) , Jamrozy, M. (Author) , Jankowsky, Felix (Author) , Joshi, V. (Author) , Jung-Richardt, I. (Author) , Kasai, E. (Author) , Katarzyński, K. (Author) , Khatoon, R. (Author) , Khélifi, B. (Author) , Kluźniak, W. (Author) , Komin, Nu (Author) , Kosack, K. (Author) , Kostunin, D. (Author) , Kundu, A. (Author) , Lang, R. G. (Author) , Stum, S. Le (Author) , Leitl, F. (Author) , Lemière, A. (Author) , Lemoine-Goumard, M. (Author) , Lenain, J.-P. (Author) , Lypova, Iryna (Author) , Luashvili, A. (Author) , Mackey, J. (Author) , Malyshev, D. (Author) , Martí-Devesa, G. (Author) , Marx, Ramin (Author) , Mehta, A. (Author) , Meyer, M. (Author) , Mitchell, A. (Author) , Moderski, R. (Author) , Moghadam, M. O. (Author) , Mohrmann, Lars (Author) , Montanari, Alessandro (Author) , Moulin, E. (Author) , Murach, T. (Author) , Naurois, M. de (Author) , Niemiec, J. (Author) , Ohm, S. (Author) , Olivera-Nieto, Laura (Author) , Wilhelmi, E. de Ona (Author) , Panny, S. (Author) , Panter, M. (Author) , Parsons, R. D. (Author) , Pensec, U. (Author) , Pita, S. (Author) , Pühlhofer, G. (Author) , Punch, M. (Author) , Quirrenbach, Andreas (Author) , Regeard, M. (Author) , Reimer, A. (Author) , Reimer, O. (Author) , Ren, Helena (Author) , Reville, Brian (Author) , Rieger, Frank M. (Author) , Rudak, B. (Author) , Ruiz Velasco, Edna Loredana (Author) , Sahakian, V. (Author) , Salzmann, H. (Author) , Santangelo, A. (Author) , Sasaki, M. (Author) , Schüssler, F. (Author) , Schutte, H. M. (Author) , Shapopi, J. N. S. (Author) , Sol, H. (Author) , Spencer, S. (Author) , Stawarz, Ł (Author) , Steenkamp, R. (Author) , Steinmaßl, Simon (Author) , Steppa, C. (Author) , Streil, K. (Author) , Takahashi, T. (Author) , Tanaka, T. (Author) , Taylor, A. M. (Author) , Terrier, R. (Author) , Tsirou, M. (Author) , Eldik, C. van (Author) , Venter, C. (Author) , Vink, J. (Author) , Wach, T. (Author) , Wagner, Stefan (Author) , Wierzcholska, A. (Author) , Zacharias, Michael (Author) , Zdziarski, A. A. (Author) , Zech, A. (Author) , Zilberman, P. (Author) , Żywucka, N. (Author)
Format:	Article (Journal)
Language:	English
Published:	May 2024
In:	Astronomy and astrophysics Year: 2024, Volume: 685, Pages: 1-10
ISSN:	1432-0746
DOI:	10.1051/0004-6361/202348913
Online Access:	Verlag, kostenfrei, Volltext: https://doi.org/10.1051/0004-6361/202348913 Verlag, kostenfrei, Volltext: https://www.aanda.org/articles/aa/abs/2024/05/aa48913-23/aa48913-23.html
Author Notes:	H.E.S.S. Collaboration: F. Aharonian, F. Ait Benkhali, J. Aschersleben, H. Ashkar, M. Backes, V. Barbosa Martins, R. Batzofin, Y. Becherini, D. Berge, K. Bernlöhr, M. Böttcher, C. Boisson, J. Bolmont, M. de Bony de Lavergne, F. Bradascio, R. Brose, F. Brun, B. Bruno, T. Bulik, C. Burger-Scheidlin, T. Bylund, S. Casanova, R. Cecil, J. Celic, M. Cerruti, T. Chand, S. Chandra, A. Chen, J. Chibueze, O. Chibueze, T. Collins, G. Cotter, J. Damascene Mbarubucyeye, A. Djannati-Ataï, J. Djuvsland, A. Dmytriiev, K. Egberts, S. Einecke, S. Fegan, G. Fontaine, S. Funk, S. Gabici, J.F. Glicenstein, J. Glombitza, G. Grolleron, L. Haerer, W. Hofmann, T.L. Holch, M. Holler, D. Horns, M. Jamrozy, F. Jankowsky, V. Joshi, I. Jung-Richardt, E. Kasai, K. Katarzyński, R. Khatoon, B. Khélifi, W. Kluźniak, Nu Komin, K. Kosack, D. Kostunin, A. Kundu, R.G. Lang, S. Le Stum, F. Leitl, A. Lemière, M. Lemoine-Goumard, J.-P. Lenain, I. Lypova, A. Luashvili, J. Mackey, D. Malyshev, G. Martí-Devesa, R. Marx, A. Mehta, M. Meyer, A. Mitchell, R. Moderski, M.O. Moghadam, L. Mohrmann, A. Montanari, E. Moulin, T. Murach, M. de Naurois, J. Niemiec, S. Ohm, L. Olivera-Nieto, E. de Ona Wilhelmi, S. Panny, M. Panter, R.D. Parsons, U. Pensec, S. Pita, G. Pühlhofer, M. Punch, A. Quirrenbach, M. Regeard, A. Reimer, O. Reimer, H. Ren, B. Reville, F. Rieger, B. Rudak, E. Ruiz-Velasco, V. Sahakian, H. Salzmann, A. Santangelo, M. Sasaki, F. Schüssler, H.M. Schutte, J.N.S. Shapopi, H. Sol, S. Spencer, Ł. Stawarz, R. Steenkamp, S. Steinmassl, C. Steppa, K. Streil, T. Takahashi, T. Tanaka, A.M. Taylor, R. Terrier, M. Tsirou, C. van Eldik, C. Venter, J. Vink, T. Wach, S.J. Wagner, A. Wierzcholska, M. Zacharias, A.A. Zdziarski, A. Zech, P. Zilberman, and N. Żywucka