Pulsars as candidates of LHAASO sources J2226+6057,J1908+0621,and J1825-1326:The leptonic origin  

作　　者：常哲 况宇庭 张旭坤 周敬之 Zhe Chang;Yu-Ting Kuang;Xukun Zhang;Jing-Zhi Zhou(Theoretical Physics Division,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]Theoretical Physics Division,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics C》2023年第6期161-166,共6页中国物理C（英文版）

基　　金：Supported by the National Nature Science Foundation of China(12075249,11690022);the Key Research Program of the Chinese Academy of Sciences(XDPB15)。

摘　　要：Recently,from 12γ-ray Galactic sources,the LHAASO has detected ultrahigh-energy photons up to 1.4 PeV.Theγ-ray spectra of the sources J2226+6057,J1908+0621,and J1825-1326 and the suggested origin pulsars near the sources have been published.In our previous work,we studied the hadronicγ-ray spectra of the sources J2226+6057,J1908+0621,and J1825-1326 in terms of the Hertzian dipole model of pulsars.In this paper,we investigate the possibility of the leptonic origin of theγ-ray.We use the Hertzian dipole model to describe the pulsars around the sources.The electrons around the pulsars can be accelerated to PeV by the electromagnetic fields of pulsars.Under the assumption that the initial electrons are uniformly distributed in a spherical shell between 10^(7)and 10^(9)m around the pulsar,we obtain the energy distribution of electrons.The leptonicγ-ray spectra can be calculated through inverse Compton scattering processes.The leptonicγ-ray can roughly conform to the observation of LHAASO.

关 键 词：GAMMA-RAYS cosmic rays acceleration of particles PULSARS 

分 类 号：P145.6[天文地球—天体物理]