publication . Article . Preprint . Other literature type . 2017

Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth

Abeysekara, A. U.; Albert, A.; Alfaro, R.; Alvarez, C.; Álvarez, J. D.; Arceo, R.; Arteaga-Velázquez, J. C.; Avila Rojas, D.; Ayala Solares, H. A.; Barber, A. S.; ...
Open Access
  • Published: 16 Nov 2017 Journal: Science, volume 358, pages 911-914 (issn: 0036-8075, eissn: 1095-9203, Copyright policy)
  • Publisher: American Association for the Advancement of Science (AAAS)
Abstract
The unexpectedly high flux of cosmic ray positrons detected at Earth may originate from nearby astrophysical sources, dark matter, or unknown processes of cosmic-ray secondary production. We report the detection, using the HighAltitude Water Cherenkov Observatory (HAWC), of extended tera-electron volt gamma-ray emission coincident with the locations of two nearby middle-aged pulsars (Geminga and PSR B0656+14). The HAWC observations demonstrate that these pulsars are indeed local sources of accelerated leptons, but the measured tera-electron volt emission profile constrains the diffusion of particles away from these sources to be much slower than previously assum...
Subjects
arXiv: Astrophysics::High Energy Astrophysical PhenomenaAstrophysics::Instrumentation and Methods for AstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics
free text keywords: HAWC - Abteilung Hinton, Multidisciplinary, Positron, Cherenkov radiation, Pulsar, Physics, Gamma ray, Astrophysics, Flux, Lepton, Astronomy, Dark matter, Observatory, Astrophysics - High Energy Astrophysical Phenomena
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publication . Article . Preprint . Other literature type . 2017

Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth

Abeysekara, A. U.; Albert, A.; Alfaro, R.; Alvarez, C.; Álvarez, J. D.; Arceo, R.; Arteaga-Velázquez, J. C.; Avila Rojas, D.; Ayala Solares, H. A.; Barber, A. S.; ...