High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S.

Owing to their rapid cooling rate and hence loss-limited propagation distance, cosmic-ray electrons and positrons (CRe) at very high energies probe local cosmic-ray accelerators and provide constraints on exotic production mechanisms such as annihilation of dark matter particles. We present a high-statistics measurement of the spectrum of CRe candidate events from 0.3 to 40 TeV with the High Energy Stereoscopic System, covering 2 orders of magnitude in energy and reaching a proton rejection power of better than 10^{4}. The measured spectrum is well described by a broken power law, with a break around 1 TeV, where the spectral index increases from Γ_{1}=3.25±0.02(stat)±0.2(sys) to Γ_{2}=4.49±0.04(stat)±0.2(sys). Apart from the break, the spectrum is featureless. The absence of distinct signatures at multi-TeV energies imposes constraints on the presence of nearby CRe accelerators and the local CRe propagation mechanisms.

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Publication Details

Journal
Physical Review Letters
Published
2024-11-25
DOI
https://doi.org/10.1103/physrevlett.133.221001
Citations
16
Primary Topic
Dark Matter and Cosmic Phenomena
Type
article
Field-Weighted Citation Impact
10.55

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article

High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S.

S. Funk, E. de Oña Wilhelmi, Gavin Rowell, Michael Backes et al.
16 citations
Physical Review Letters
Dark Matter and Cosmic Phenomena
10.55
article

High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S.

S. Funk, E. de Oña Wilhelmi, Gavin Rowell, Michael Backes, F. Schüßler, D. Malyshev, A. Montanari, S. Einecke, S. J. Wagner, M. Sasaki, S. Casanova, S. Ravikularaman, T. L. Holch, Mathieu de Bony de Lavergne, Daniel R. Parsons, R. Terrier, H. Suzuki, F. Brun, M. Punch, A. Wierzcholska, Brian Reville, Jonas Glombitza, D. Horns, A. Dmytriiev, Igor Adriano de Oliveira Reis, Makarim Bouyahiaoui, B. Khélifi, K. Egberts, B. A. Hess, G. Fontaine, J. Chibueze, S. Chandra, E. Ruiz-Velasco, K. Bernlöhr, A. Mitchell, W. Kluźniak, Laura Olivera-Nieto, T. J. B. Collins, A. Kundu, Jonathan Mackey, E. Kasai, J. Aschersleben, C. Venter, V. Barbosa Martins, Marianne Lemoine-Goumard, S. Fegan, J. Damascene Mbarubucyeye, Frank Rieger, M. Jamrozy, F. Leitl, B. Rudak, M. Ostrowski, M. Vecchi, V. Marandon, Y. Becherini, K. Feijen, J. Bolmont, C. Burger-Scheidlin, S. Le Stum, S. Spencer, R. Moderski, L. Mohrmann, A. M. Brown, Andrew M. Taylor, T. Bulik, J. N. S. Shapopi, J.-P. Lenain, H. Ren, J. Niemiec, R. G. Lang, Fabian Leuschner, M. Meyer, Rowan William Batzofin, A. A. Zdziarski, S. Gabici, S. Steinmassl, A. Santangelo, Jan Schäfer, K. Kosack, A. Quirrenbach, Baiyang Bi, D. Kostunin, T. Wach, Nu. Komin, Sebastian Panny, G. Martí-Devesa, Peter David Marinos, U. Pensec, Maxime Regeard, O. Reimer, A. Reimer, A. Chen, J. I. Djuvsland, F. Ait Benkhali, F. Aharonian, G. Peron, M. Panter, W. Hofmann, H. M. Schutte, F. Jankowsky, Ł. Stawarz, E. Moulin, R. Brose, Natalia Żywucka, Zhiqiu Huang, V. Joshi, T. Chand, C. Steppa, O. Chibueze, A. Luashvili, H. Salzmann, J. Borowska, J. Devin, C. van Eldik, H. Ashkar, M. de Naurois, A. Lemière, Y. A. Gallant, H. Sol, C. Boisson, M. Holler, G. Pühlhofer, S. Ohm, J.-P. Ernenwein, D. Berge, I. Jung-Richardt, M. Zacharias, A. S. Sharma, J. F. Glicenstein, R. Khatoon, A. Zech, M. Böttcher, G. Grolleron, G. Cotter, B. Bruno, J. Vink, V. Sahakian, R. Marx, T. Takahashi, M. O. Moghadam, M. Tsirou, T. Bylund, T. Tanaka, M. Cerruti, D. Kerszberg, K. Katarzyński
article en
16 citations

Abstract

Owing to their rapid cooling rate and hence loss-limited propagation distance, cosmic-ray electrons and positrons (CRe) at very high energies probe local cosmic-ray accelerators and provide constraints on exotic production mechanisms such as annihilation of dark matter particles. We present a high-statistics measurement of the spectrum of CRe candidate events from 0.3 to 40 TeV with the High Energy Stereoscopic System, covering 2 orders of magnitude in energy and reaching a proton rejection power of better than 10^{4}. The measured spectrum is well described by a broken power law, with a break around 1 TeV, where the spectral index increases from Γ_{1}=3.25±0.02(stat)±0.2(sys) to Γ_{2}=4.49±0.04(stat)±0.2(sys). Apart from the break, the spectrum is featureless. The absence of distinct signatures at multi-TeV energies imposes constraints on the presence of nearby CRe accelerators and the local CRe propagation mechanisms.

Physical Review LettersVol. 133(22)
Jagiellonian University (PL), Dublin Institute For Advanced Studies (IE), A. Alikhanyan National Laboratory (AM), Université de Bordeaux (FR), Universität Hamburg (DE), Konan University (JP), University of Groningen (NL), University of Potsdam (DE), University of Southern Denmark (DK), Friedrich-Alexander-Universität Erlangen-Nürnberg (DE), Universität Innsbruck (AT), University of the Witwatersrand (ZA), Yerevan State University (AM), Université de Montpellier (FR), Université Paris Cité (FR), Aix-Marseille Université (FR), University of Namibia (NA), Linnaeus University (SE), Heidelberg University (DE), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Université Paris Sciences et Lettres (FR), North-West University (ZA), Université Paris-Saclay (FR), Deutsches Elektronen-Synchrotron DESY (DE), Laboratoire AstroParticule et Cosmologie (FR), Nicolaus Copernicus University (PL), Humboldt-Universität zu Berlin (DE), Sorbonne Université (FR), University of Oxford (GB), Centre de physique des particules de Marseille (FR), Laboratoire de Physique des deux infinis Bordeaux (FR), CEA Paris-Saclay (FR), Laboratoire Leprince-Ringuet (FR), Max Planck Institute for Nuclear Physics (DE), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Laboratoire Médiations (FR), University of Warsaw (PL), The University of Adelaide (AU), The University of Tokyo (JP), University of Tübingen (DE), University of Amsterdam (NL), Polish Academy of Sciences (PL)
Department of Science and Innovation, South Africa, EGI Federation, National Research Foundation, Science Foundation Ireland, Helmholtz-Gemeinschaft, Universiteit van Amsterdam, Irish Research Council, Bundesministerium für Bildung und Forschung, Austrian Science Fund, Max-Planck-Gesellschaft, Ministère de l'Education Nationale, de l'Enseignement Superieur et de la Recherche, Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, National Commission on Research, Science and Technology, University of Namibia, Bundesministerium für Bildung, Wissenschaft und Forschung, Science and Technology Facilities Council, Australian Research Council, Japan Society for the Promotion of Science, Institut national des sciences de l'Univers, Institut National de Physique Nucléaire et de Physique des Particules
Openalex Percentile: Top 1%
Dark Matter and Cosmic Phenomena
10.55
DOIOpen Access PDFOpenAlex
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