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

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

doi:10.1103/PhysRevLett.133.221001

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

MPS-Authors

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Aharonian, F.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30300

Bernlöhr, K.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons269770

Bouyahiaoui, M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons293014

Djuvsland, J.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30605

Hofmann, W.
Prof. Werner Hofmann, Emeriti, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons291841

Huang, Zhiqiu
Brian Reville, Astrophysical Plasma Theory (APT) - Max Planck Research Group, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons267367

Mohrmann, L.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons242418

Olivera Nieto, L.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30878

Panter, M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons265621

Ren, H.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30940

Reville, B.
Brian Reville, Astrophysical Plasma Theory (APT) - Max Planck Research Group, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30943

Rieger, F.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons252628

Ruiz-Velasco, E.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons240503

Steinmassl, S.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.133.221001
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Citation

H.E.S.S. Collaboration, Aharonian, F., Ait Benkhali, F., Aschersleben, J., Ashkar, H., Backes, M., et al. (2024). High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S. Physical Review Letters, 133(22): 221001. doi:10.1103/PhysRevLett.133.221001.

Cite as: https://hdl.handle.net/21.11116/0000-0010-3C5D-4

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 104. The measured spectrum is well described by a broken power law, with a break around 1 TeV, where the spectral index increases from Γ₁=3.25±0.02⁢(stat)±0.2⁢(sys) to Γ₂=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.