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Discovery of a radiation component from the Vela pulsar reaching 20 teraelectronvolts
Dublin Inst Adv Studies, Ireland;Max Planck Inst Kernphys, Germany;Yerevan State Univ, Armenia.
Heidelberg Univ, Germany.
Univ Amsterdam, Netherlands.
Inst Polytech Paris, France.
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2023 (English)In: Nature Astronomy, E-ISSN 2397-3366, Vol. 7, no 11, p. 1341-1350Article in journal (Refereed) Published
Abstract [en]

Gamma-ray observations have established energetic isolated pulsars as outstanding particle accelerators and antimatter factories. However, many questions are still open regarding the acceleration and radiation processes involved, as well as the locations where they occur. The radiation spectra of all gamma-ray pulsars observed to date show strong cutoffs or a break above energies of a few gigaelectronvolts. Using the High Energy Stereoscopic System's Cherenkov telescopes, we discovered a radiation component from the Vela pulsar which emerges beyond this generic cutoff and extends up to energies of at least 20 teraelectronvolts. This is an order of magnitude larger than in the case of the Crab pulsar, the only other pulsar detected in the teraelectronvolt energy range. Our results challenge the state-of-the-art models for the high-energy emission of pulsars. Furthermore, they pave the way for investigating other pulsars through their multiteraelectronvolt emission, thereby imposing additional constraints on the acceleration and emission processes in their extreme energy limit. The H.E.S.S. gamma-ray observatory has observed gamma rays with energies of at least 20 TeV from a pulsar, an energy regime that is hard to reconcile with the existing theories of gamma-ray production for such objects.
Place, publisher, year, edition, pages
Nature Publishing Group, 2023. Vol. 7, no 11, p. 1341-1350
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics, Astroparticle Physics
Identifiers
URN: urn:nbn:se:lnu:diva-128517DOI: 10.1038/s41550-023-02052-3ISI: 001085086100001Scopus ID: 2-s2.0-85173933154OAI: oai:DiVA.org:lnu-128517DiVA, id: diva2:1848092
Note

Correction published in: https://doi.org/10.1038/s41550-023-02151-1.

In the version of the article initially published, R. Zanin, M. Kerr, S. Johnston, R. M. Shannon and D. A. Smith mistakenly appeared in the main author list but are now instead listed as members of The H.E.S.S. Collaboration et al. in the HTML and PDF versions of the article.

Available from: 2024-04-02 Created: 2024-04-02 Last updated: 2024-04-17Bibliographically approved

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Becherini, YvonneBylund, TomasPunch, Michael

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