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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
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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

MARC

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245 1 0 |a Curvature in the very-high energy gamma-ray spectrum of M 87  |c 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 
246 3 3 |a Curvature in the very-high energy gamma-ray spectrum of M87 
264 1 |c May 2024 
300 |b Illustrationen 
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500 |a Gesehen am 05.08.2025 
520 |a 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 spectrum of M 87 during states of high gamma-ray activity, utilizing 20.2 h of H.E.S.S. observations. Our findings indicate a preference for a curved spectrum, characterized by a log-parabola model with extra-galactic background light (EBL) model above 0.3 TeV at the 4<i>σ<i/> level, compared to a power-law spectrum with EBL. We investigate the degeneracy between the absorption feature and the EBL normalization and derive upper limits on EBL models that are mainly sensitive in the wavelength range of 12.4 μm-40 μm. 
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773 0 8 |i Enthalten in  |t Astronomy and astrophysics  |d Les Ulis : EDP Sciences, 1969  |g 685(2024) vom: Mai, Artikel-ID A96, Seite 1-10  |h Online-Ressource  |w (DE-627)253390222  |w (DE-600)1458466-9  |w (DE-576)072283351  |x 1432-0746  |7 nnas  |a Curvature in the very-high energy gamma-ray spectrum of M 87 
773 1 8 |g volume:685  |g year:2024  |g month:05  |g elocationid:A96  |g pages:1-10  |g extent:10  |a Curvature in the very-high energy gamma-ray spectrum of M 87 
856 4 0 |u https://doi.org/10.1051/0004-6361/202348913  |x Verlag  |x Resolving-System  |z kostenfrei  |3 Volltext 
856 4 0 |u https://www.aanda.org/articles/aa/abs/2024/05/aa48913-23/aa48913-23.html  |x Verlag  |z kostenfrei  |3 Volltext 
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