期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
由超拍电子伏特加速器产生的超高能伽马射线气泡 被引量:2
1
作者 LHAASO Collaboration Zhen Cao +3 位作者 chuandong gao Cong Li Ruo-Yu Liu Ruizhi Yang 《Science Bulletin》 SCIE EI CAS CSCD 2024年第4期449-457,共9页
We report the detection of aγ-ray bubble spanning at least 100deg2 in ultra-high energy(UHE)up to a few PeV in the direction of the star-forming region Cygnus X,implying the presence super PeVatron(s)accelerating pro... We report the detection of aγ-ray bubble spanning at least 100deg2 in ultra-high energy(UHE)up to a few PeV in the direction of the star-forming region Cygnus X,implying the presence super PeVatron(s)accelerating protons to at least 10 PeV.A log-parabola form with the photon indexΓ(E)=(2.71±0.02)+(0.11±0.02)×log10(E/10 TeV)is found fitting the gamma-ray energy spectrum of the bubble well.UHE sources,“hot spots”correlated with very massive molecular clouds,and a quasi-spherical amorphousγ-ray emitter with a sharp central brightening are observed in the bubble.In the core of~0.5°,spatially associating with a region containing massive OB association(Cygnus OB2)and a microquasar(Cygnus X-3),as well as previously reported multi-TeV sources,an enhanced concentration of UHEγ-rays is observed with 2 photons at energies above 1 PeV.The general feature of the bubble,the morphology,and the energy spectrum,are reasonably reproduced by the assumption of a particle accelerator in the core,continuously injecting protons into the ambient medium. 展开更多
关键词 Cosmic rays γ-rays Interstellar medium Star cluster
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部