A GeV-TeV particle component and the barrier of cosmic-ray sea in the Central Molecular Zone.
A GeV-TeV particle component and the barrier of cosmic-ray sea in the Central Molecular Zone.
复制标题
GeV-TeV粒子成分与中心分子带宇宙线海势垒
DOI:
10.1038/s41467-021-26436-z
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发表时间:
2021-11-09
影响因子:
16.6
通讯作者:
Fan YZ
中科院分区:
文献类型:
--
作者:
Huang X;Yuan Q;Fan YZ
Cosmic rays are important probe of a number of fundamental physical problems such as the acceleration of high and very high energy particles in extreme astrophysical environments. The Galactic center is widely anticipated to be an important cosmic-ray source and the observations of some Imaging Atmospheric Cherenkov Telescopes did successfully reveal a component of TeV-PeV cosmic rays in the vicinity of the Galactic center. Here we report the identification of GeV-TeV cosmic rays in the central molecular zone with theγ-ray observations of the Fermi Large Area Telescope, whose spectrum and spatial gradient are consistent with that measured by the Imaging Atmospheric Cherenkov Telescopes but the corresponding cosmic-ray energy density is substantially lower than the so-called cosmic-ray sea component, suggesting the presence of a high energy particle accelerator at the Galactic center and the existence of a barrier that can effectively suppress the penetration of the particles from the cosmic-ray sea to the central molecular zone.
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