Measurement of Cosmic-ray Electrons at TeV Energies by VERITAS

Show simple item record Santander, Marcos 2019-06-26T15:31:50Z 2019-06-26T15:31:50Z 2018-09-20 en_US
dc.identifier.citation Archer, A., et al. (2018): Measurement of Cosmic-ray Electrons at TeV Energies by VERITAS. Physical Review D, 98(6). DOI: en_US
dc.description.abstract Cosmic-ray electrons and positrons (CREs) at GeV-TeV energies are a unique probe of our local Galactic neighborhood. CREs lose energy rapidly via synchrotron radiation and inverse-Compton scattering processes while propagating within the Galaxy, and these losses limit their propagation distance. For electrons with TeV energies, the limit is on the order of a kiloparsec. Within that distance, there are only a few known astrophysical objects capable of accelerating electrons to such high energies. It is also possible that the CREs are the products of the annihilation or decay of heavy dark matter (DM) particles. VERITAS, an array of imaging air Cherenkov telescopes in southern Arizona, is primarily utilized for gamma-ray astronomy but also simultaneously collects CREs during all observations. We describe our methods of identifying CREs in VERITAS data and present an energy spectrum, extending from 300 GeV to 5 TeV, obtained from approximately 300 hours of observations. A single power-law fit is ruled out in VERITAS data. We find that the spectrum of CREs is consistent with a broken power law, with a break energy at 710 ± 40_stat ± 140_syst GeV. en_US
dc.format.mimetype application/pdf en_US
dc.language English en_US
dc.subject Gravitation, Cosmology & Astrophysics en_US
dc.subject Cosmic ray composition & spectra en_US
dc.title Measurement of Cosmic-ray Electrons at TeV Energies by VERITAS en_US
dc.type text en_US

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