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.; ...
  • Published: 16 Nov 2017
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.; ...