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

F Aharonian^{1

2

3}, F Ait Benkhali⁴, J Aschersleben⁵, H Ashkar⁶, M Backes^{7

8}, V Barbosa Martins⁹, R Batzofin¹⁰, Y Becherini^{11

12}, D Berge^{9

13}, K Bernlöhr², B Bi¹⁴, M Böttcher⁸, C Boisson¹⁵, J Bolmont¹⁶, M de Bony de Lavergne¹⁷, J Borowska¹³, M Bouyahiaoui², R Brose¹, A Brown¹⁸, F Brun¹⁷, B Bruno¹⁹, T Bulik²⁰, C Burger-Scheidlin¹, T Bylund¹⁷, S Casanova²¹, J Celic¹⁹, M Cerruti¹¹, T Chand⁸, S Chandra⁸, A Chen²², J Chibueze⁸, O Chibueze⁸, T Collins¹⁰, G Cotter¹⁸, J Damascene Mbarubucyeye⁹, J Devin²³, J Djuvsland², A Dmytriiev⁸, K Egberts¹⁰, S Einecke²⁴, J-P Ernenwein²⁵, S Fegan⁶, K Feijen¹¹, G Fontaine⁶, S Funk¹⁹, S Gabici¹¹, Y A Gallant²³, J F Glicenstein¹⁷, J Glombitza¹⁹, G Grolleron¹⁶, B Heß¹⁴, W Hofmann², T L Holch⁹, M Holler²⁶, D Horns²⁷, Zhiqiu Huang², M Jamrozy²⁸, F Jankowsky⁴, V Joshi¹⁹, I Jung-Richardt¹⁹, E Kasai⁷, K Katarzyński²⁹, D Kerszberg¹⁶, R Khatoon⁸, B Khélifi¹¹, W Kluźniak³⁰, Nu Komin²², K Kosack¹⁷, D Kostunin⁹, A Kundu⁸, R G Lang¹⁹, S Le Stum²⁵, F Leitl¹⁹, A Lemière¹¹, M Lemoine-Goumard³¹, J-P Lenain¹⁶, F Leuschner¹⁴, A Luashvili¹⁵, J Mackey¹, D Malyshev¹⁴, D Malyshev¹⁹, V Marandon¹⁷, P Marinos²⁴, G Martí-Devesa²⁶, R Marx⁴, M Meyer³², A Mitchell¹⁹, R Moderski³⁰, M O Moghadam¹⁰, L Mohrmann², A Montanari⁴, E Moulin¹⁷, M de Naurois⁶, J Niemiec²¹, S Ohm⁹, L Olivera-Nieto², E de Ona Wilhelmi⁹, M Ostrowski²⁸, S Panny²⁶, M Panter², D Parsons¹³, U Pensec¹⁶, G Peron¹¹, G Pühlhofer¹⁴, M Punch¹¹, A Quirrenbach⁴, S Ravikularaman^{2

11}, M Regeard¹¹, A Reimer²⁶, O Reimer²⁶, I Reis¹⁷, H Ren², B Reville², F Rieger², G Rowell²⁴, B Rudak³⁰, E Ruiz-Velasco², V Sahakian³³, H Salzmann¹⁴, A Santangelo¹⁴, M Sasaki¹⁹, J Schäfer¹⁹, F Schüssler¹⁷, H M Schutte⁸, J N S Shapopi⁷, A Sharma¹¹, H Sol¹⁵, S Spencer¹⁹, Ł Stawarz²⁸, S Steinmassl², C Steppa¹⁰, H Suzuki³⁴, T Takahashi³⁵, T Tanaka³⁴, A M Taylor⁹, R Terrier¹¹, M Tsirou⁹, C van Eldik¹⁹, M Vecchi⁵, C Venter⁸, J Vink³⁶, T Wach¹⁹, S J Wagner⁴, A Wierzcholska²¹, M Zacharias^{4

8}, A A Zdziarski³⁰, A Zech¹⁵, N Żywucka⁸; H.E.S.S. Collaboration

Affiliations

¹ Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland.
² Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany.
³ Yerevan State University, 1 Alek Manukyan Street, Yerevan 0025, Armenia.
⁴ Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany.
⁵ Kapteyn Astronomical Institute, University of Groningen, Landleven 12, 9747 AD Groningen, The Netherlands.
⁶ Laboratoire Leprince-Ringuet, École Polytechnique, CNRS, Institut Polytechnique de Paris, F-91128 Palaiseau, France.
⁷ University of Namibia, Department of Physics, Private Bag 13301, Windhoek 10005, Namibia.
⁸ Centre for Space Research, North-West University, Potchefstroom 2520, South Africa.
⁹ Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany.
¹⁰ Institut für Physik und Astronomie, <a href="https://ror.org/03bnmw459">Universität Potsdam</a>, Karl-Liebknecht-Strasse 24/25, D 14476 Potsdam, Germany.
¹¹ Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France.
¹² Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden.
¹³ Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, D 12489 Berlin, Germany.
¹⁴ Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany.
¹⁵ Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université Paris Cité, 5 place Jules Janssen, 92190 Meudon, France.
¹⁶ Sorbonne Université, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies, LPNHE, 4 place Jussieu, 75005 Paris, France.
¹⁷ IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
¹⁸ Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom.
¹⁹ Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Nikolaus-Fiebiger-Strasse 2, 91058 Erlangen, Germany.
²⁰ Astronomical Observatory, The University of Warsaw, Aleje Ujazdowskie 4, 00-478 Warsaw, Poland.
²¹ Instytut Fizyki Jądrowej PAN, ulica Radzikowskiego 152, 31-342 Kraków, Poland.
²² School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg 2050, South Africa.
²³ Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France.
²⁴ School of Physical Sciences, University of Adelaide, Adelaide, South Australia 5005, Australia.
²⁵ Aix Marseille Université, CNRS/IN2P3, CPPM, Marseille, France.
²⁶ Universität Innsbruck, Institut für Astro- und Teilchenphysik, Technikerstraße 25, 6020 Innsbruck, Austria.
²⁷ Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, D 22761 Hamburg, Germany.
²⁸ Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ulica Orla 171, 30-244 Kraków, Poland.
²⁹ Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland.
³⁰ Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ulica Bartycka 18, 00-716 Warsaw, Poland.
³¹ Université Bordeaux, CNRS, LP2I Bordeaux, UMR 5797, F-33170 Gradignan, France.
³² University of Southern Denmark, 5230 Odense, Denmark.
³³ Yerevan Physics Institute, 2 Alikhanian Brothers Street, 0036 Yerevan, Armenia.
³⁴ Department of Physics, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, Hyogo 658-8501, Japan.
³⁵ Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa, Chiba 277-8583, Japan.
³⁶ GRAPPA, Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.

PMID: 39672149
DOI: 10.1103/PhysRevLett.133.221001

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

F Aharonian et al. Phys Rev Lett. 2024.

. 2024 Nov 29;133(22):221001.

doi: 10.1103/PhysRevLett.133.221001.

Authors

Affiliations

¹ Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland.
² Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany.
³ Yerevan State University, 1 Alek Manukyan Street, Yerevan 0025, Armenia.
⁴ Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany.
⁵ Kapteyn Astronomical Institute, University of Groningen, Landleven 12, 9747 AD Groningen, The Netherlands.
⁶ Laboratoire Leprince-Ringuet, École Polytechnique, CNRS, Institut Polytechnique de Paris, F-91128 Palaiseau, France.
⁷ University of Namibia, Department of Physics, Private Bag 13301, Windhoek 10005, Namibia.
⁸ Centre for Space Research, North-West University, Potchefstroom 2520, South Africa.
⁹ Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany.
¹⁰ Institut für Physik und Astronomie, <a href="https://ror.org/03bnmw459">Universität Potsdam</a>, Karl-Liebknecht-Strasse 24/25, D 14476 Potsdam, Germany.
¹¹ Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France.
¹² Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden.
¹³ Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, D 12489 Berlin, Germany.
¹⁴ Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany.
¹⁵ Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université Paris Cité, 5 place Jules Janssen, 92190 Meudon, France.
¹⁶ Sorbonne Université, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies, LPNHE, 4 place Jussieu, 75005 Paris, France.
¹⁷ IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
¹⁸ Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom.
¹⁹ Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Nikolaus-Fiebiger-Strasse 2, 91058 Erlangen, Germany.
²⁰ Astronomical Observatory, The University of Warsaw, Aleje Ujazdowskie 4, 00-478 Warsaw, Poland.
²¹ Instytut Fizyki Jądrowej PAN, ulica Radzikowskiego 152, 31-342 Kraków, Poland.
²² School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg 2050, South Africa.
²³ Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France.
²⁴ School of Physical Sciences, University of Adelaide, Adelaide, South Australia 5005, Australia.
²⁵ Aix Marseille Université, CNRS/IN2P3, CPPM, Marseille, France.
²⁶ Universität Innsbruck, Institut für Astro- und Teilchenphysik, Technikerstraße 25, 6020 Innsbruck, Austria.
²⁷ Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, D 22761 Hamburg, Germany.
²⁸ Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ulica Orla 171, 30-244 Kraków, Poland.
²⁹ Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland.
³⁰ Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ulica Bartycka 18, 00-716 Warsaw, Poland.
³¹ Université Bordeaux, CNRS, LP2I Bordeaux, UMR 5797, F-33170 Gradignan, France.
³² University of Southern Denmark, 5230 Odense, Denmark.
³³ Yerevan Physics Institute, 2 Alikhanian Brothers Street, 0036 Yerevan, Armenia.
³⁴ Department of Physics, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, Hyogo 658-8501, Japan.
³⁵ Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa, Chiba 277-8583, Japan.
³⁶ GRAPPA, Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.

PMID: 39672149
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 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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High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S

Affiliations

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

Authors

Affiliations

Abstract

LinkOut - more resources

Full Text Sources