PoS - Proceedings of Science
Volume 301 - 35th International Cosmic Ray Conference (ICRC2017) - Session Gamma-Ray Astronomy. GA-galactic
Constraining the Diffusion Coefficient with HAWC TeV Gamma-Ray Observations of Two Nearby Pulsar Wind Nebulae
H. Zhou,* R. Lopez-Coto, F. Salesa Greus on behalf of the HAWC Collaboration
*corresponding author
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Pre-published on: August 16, 2017
Published on: August 03, 2018
Nearby electron/positron accelerators, mostly Pulsar Wind Nebulae (PWNe), have been pro- posed as potential origins of the positron excess above 10 GeV. The HAWC Observatory reveals two very extended sources spatially coincident with two nearby middle-aged pulsars: Geminga and PSR B0656+14, suggesting ultra-relativistic electrons/positrons accelerated in our backyard. Morphological studies on these two PWNe provide a constraint on the diffusion coefficient at HAWC energies. In this poster, we will present the model development and morphological stud- ies on these PWNe, and the derived diffusion coefficient that best fits the data.
DOI: https://doi.org/10.22323/1.301.0690
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