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

Aharonian F, Benkhali FA, Aschersleben J, Ashkar H, Backes M, Martins VB, Batzofin R, Becherini Y, Berge D, Bernlöhr K, Bi B, Böttcher M, Boisson C, Bolmont J, De Lavergne MDB, 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, Mbarubucyeye JD, Devin J, Djuvsland J, Dmytriiev A, Egberts K, Einecke S, Ernenwein JP, Fegan S, Feijen K, Fontaine G, Funk S, Gabici S, Gallant YA, Glicenstein JF, Glombitza J, Grolleron G, Heß B, Hofmann W, Holch TL, Holler M, Horns D, Huang Z, Jamrozy M, Jankowsky F, Joshi V, Jung-Richardt I, Kasai E, Katarzyński K, Kerszberg D, Khatoon R, Khélifi B, Kluźniak W, Komin N, Kosack K, Kostunin D, Kundu A, Guedes Lang R, Le Stum S, Leitl F, Lemière A, Lemoine-Goumard M, Lenain JP, Leuschner F, Luashvili A, MacKey J, Malyshev D, Marandon V, Marinos P, Martí-Devesa G, Marx R, Meyer M, Mitchell A, Moderski R, Moghadam MO, Mohrmann L, Montanari A, Moulin E, De Naurois M, Niemiec J, Ohm S, Olivera-Nieto L, Wilhelmi EDO, 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 HM, Shapopi JN, Sharma A, Sol H, Spencer S, Stawarz , Steinmassl S, Steppa C, Suzuki H, Takahashi T, Tanaka T, Taylor AM, Terrier R, Tsirou M, van Eldik C, Vecchi M, Venter C, Vink J, Wach T, Wagner SJ, Wierzcholska A, Zacharias M, Zdziarski AA, Zech A, Żywucka N (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Book Volume: 133

Article Number: 221001

Journal Issue: 22

DOI: 10.1103/PhysRevLett.133.221001

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.

Authors with CRIS profile

Involved external institutions

Nicolaus Copernicus Astronomical Centre of the Polish Academy of Sciences Poland (PL) Ruprecht-Karls-Universität Heidelberg Germany (DE) University of Groningen / Rijksuniversiteit Groningen Netherlands (NL) Laboratoire Leprince-Ringuet (LLR) France (FR) Universität Potsdam Germany (DE) Deutsches Elektronen-Synchrotron DESY Germany (DE) Laboratoire Univers et Théories (LUTH) / Laboratory of the Universe and Theories France (FR) Sorbonne Université France (FR) Institute of Research into the Fundamental Laws of the Universe / Institut de recherche sur les lois fondamentales de l'univers (IRFU) France (FR) University of Warsaw / Uniwersytet Warszawski Poland (PL) Leopold-Franzens-Universität Innsbruck / University of Innsbruck Austria (AT) Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics Germany (DE) University of Adelaide Australia (AU) Yerevan Physics Institute (YerPhI) / Երևանի Ֆիզիկայի Ինստիտուտ Armenia (AM) Eberhard Karls Universität Tübingen Germany (DE) Noordwes-Universiteit / North-West University South Africa (ZA) University of Namibia (UNAM) Namibia (NA) Université Paris-Sud France (FR) Konan University / 甲南大学 Japan (JP) Dublin Institute for Advanced Studies (DIAS) Ireland (IE) Institute of Nuclear Physics Polish Academy of Sciences / Instytut Fizyki Jądrowej im. Henryka Niewodniczańskiego Polskiej Akademii Nauk Poland (PL) University of the Witwatersrand (WITS) South Africa (ZA) University of Montpellier / Université Montpellier France (FR) Jagiellonian University / Uniwersytet Jagielloński (UJ) Poland (PL) Nicolaus Copernicus University (NCU) / Uniwersytet Mikołaja Kopernika w Toruniu (UMK) Poland (PL) Université de Bordeaux France (FR) Université Paris-Saclay France (FR) University of Oxford United Kingdom (GB) Institut national de physique nucléaire et de physique des particules (IN2P3) France (FR) Universität Hamburg (UHH) Germany (DE) Humboldt-Universität zu Berlin Germany (DE) University of Southern Denmark / Syddansk Universitet Denmark (DK) University of Tokyo Japan (JP) University of Amsterdam Netherlands (NL)

How to cite

APA:

Aharonian, F., Benkhali, F.A., Aschersleben, J., Ashkar, H., Backes, M., Martins, V.B.,... Żywucka, N. (2024). High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S. Physical Review Letters, 133(22). https://doi.org/10.1103/PhysRevLett.133.221001

MLA:

Aharonian, F., et al. "High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S." Physical Review Letters 133.22 (2024).

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