In:
Journal of Cosmology and Astroparticle Physics, IOP Publishing, Vol. 2021, No. 05 ( 2021-05-01), p. 012-
Abstract:
The local pulsar and its progenitor, SNR, can together accelerate the positron, electron and nuclei to very high energy. The famous excesses of positron(nuclei) above 20(200) GeV possibly come from such kind of local source. This hints that the primary electron should also hold “excess” above 200 GeV, synchronously accelerated along with the nuclei. The recent precise measurement of sharp dropoff at 284 GeV of positron by AMS-02 experiment takes chance to study this expected electron excess. In this work, the spatially-dependent propagation with a local source is used to reproduce the spectrum of positron, electron and proton. When considering the dropoff at 284 GeV of positron, a sharp bump structure for primary electron above 284 GeV is required to fit the total spectrum of positron and electron. Then we systematically study the common origin of the excesses of positron, electron and nuclei from Geminga pulsar and SNR. Those excesses can be reproduced under this unified single-source model. Lastly, we hope that the fine bump structure can be observed to support our model by AMS-02 experiment in future.
Type of Medium:
Online Resource
ISSN:
1475-7516
DOI:
10.1088/1475-7516/2021/05/012
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2021
detail.hit.zdb_id:
2104147-7
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