摘要
The paper investigates the overall and detailed features of cosmic ray(CR) spectra in the knee region using the scenario of nuclei-photon interactions around the acceleration sources.Young supernova remnants can be the physical realities of such kind of CR acceleration sites.The results show that the model can well explain the following problems simultaneously with one set of source parameters:the knee of CR spectra and the sharpness of the knee,the detailed irregular structures of CR spectra,the so-called"component B"of Galactic CRs,and the electron/positron excesses reported by recent observations.The coherent explanation serves as evidence that at least a portion of CRs might be accelerated at the sources similar to young supernova remnants,and one set of source parameters indicates that this portion mainly comes from standard sources or from a single source.
The paper investigates the overall and detailed features of cosmic ray(CR) spectra in the knee region using the scenario of nuclei-photon interactions around the acceleration sources.Young supernova remnants can be the physical realities of such kind of CR acceleration sites.The results show that the model can well explain the following problems simultaneously with one set of source parameters:the knee of CR spectra and the sharpness of the knee,the detailed irregular structures of CR spectra,the so-called"component B"of Galactic CRs,and the electron/positron excesses reported by recent observations.The coherent explanation serves as evidence that at least a portion of CRs might be accelerated at the sources similar to young supernova remnants,and one set of source parameters indicates that this portion mainly comes from standard sources or from a single source.
作者
WANG Bo1,YUAN Qiang1,FAN Chao1,2,ZHANG JianLi1,HU HongBo1 & BI XiaoJun1 1 Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China
2 Department of Physics,Shandong University,Jinan 250100,China
基金
supported by the Ministry of Science and Technology of China,the National Natural Sciences Foundation of China (Grant Nos. 10725524 and 10773011)
the Chinese Academy of Sciences (Grant Nos. KJCX2-YW-N13, KJCX3-SYW-N2 and GJHZ1004)
