A possible explanation of the knee of cosmic light component spectrum from 100 TeV to 3 PeV

Wen-Hui Lin; Bi-Wen Bao; Ze-Jun Jiang; Li Zhang

doi:10.1088/1674-1137/41/10/105101

Chinese Physics C> 2017, Vol. 41> Issue(10) : 105101 DOI: 10.1088/1674-1137/41/10/105101

A possible explanation of the knee of cosmic light component spectrum from 100 TeV to 3 PeV

1.
Department of Astronomy, Yunnan University, Key Laboratory of Astroparticle physics of Yunnan Province, Kunming 650091, China

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Abstract：
A mixed hydrogen and helium (H+He) spectrum with a clear steepening at 700 TeV has been detected by the ARGO-YBJ experiments. In this paper, we demonstrate that the observed H+He spectrum can be reproduced well with a model of cosmic rays escaping from the supernova remnants (SNRs) in our Galaxy. In this model, particles are accelerated in a SNR through a non-linear diffusive shock acceleration mechanism. Three components of high energy light nuclei escaped from the SNR are considered. It should be noted that the proton spectrum observed by KASCADE can be also explained by this model given a higher acceleration efficiency.
- cosmic Rays ,
- particle acceleration ,
- supernova remnants ,
- amplified magnetic field

References

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Wen-Hui Lin, Bi-Wen Bao, Ze-Jun Jiang and Li Zhang. A possible explanation of the knee of cosmic light component spectrum from 100 TeV to 3 PeV[J]. Chinese Physics C, 2017, 41(10): 105101. doi: 10.1088/1674-1137/41/10/105101

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Received: 2017-05-04
Revised: 2017-07-03

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Supported by the National Natural Science Foundation of China (11433004, 11363006, 11103016, 11173020), Top Talents Program of Yunnan Province (2015HA030) and the Natural Science Foundation of Yunnan Province(2015FB103)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

A possible explanation of the knee of cosmic light component spectrum from 100 TeV to 3 PeV

Corresponding author: Ze-Jun Jiang,

Corresponding author: Li Zhang,

1. Department of Astronomy, Yunnan University, Key Laboratory of Astroparticle physics of Yunnan Province, Kunming 650091, China

Received Date: 2017-05-04

Accepted Date: 2017-07-03

Available Online: 2017-10-05

Fund Project: Supported by the National Natural Science Foundation of China (11433004, 11363006, 11103016, 11173020), Top Talents Program of Yunnan Province (2015HA030) and the Natural Science Foundation of Yunnan Province(2015FB103)

Abstract: A mixed hydrogen and helium (H+He) spectrum with a clear steepening at 700 TeV has been detected by the ARGO-YBJ experiments. In this paper, we demonstrate that the observed H+He spectrum can be reproduced well with a model of cosmic rays escaping from the supernova remnants (SNRs) in our Galaxy. In this model, particles are accelerated in a SNR through a non-linear diffusive shock acceleration mechanism. Three components of high energy light nuclei escaped from the SNR are considered. It should be noted that the proton spectrum observed by KASCADE can be also explained by this model given a higher acceleration efficiency.

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A possible explanation of the knee of cosmic light component spectrum from 100 TeV to 3 PeV

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