耀变体3C 454.3的能谱光变研究  

Study on the Energy Spectrum Variability of Blazar 3C 454.3

作　　者：施永有 谢照华[1] 李国明 邓霄 宋雨洁 徐云冰[1] SHI Yongyou;XIE Zhaohua;LI Guoming;DENG Xiao;SONG Yujie;XU Yunbing(School of Physics and Electronic Information,Yunnan Normal University,Kunming 650500,China)

机构地区：[1]云南师范大学物理与电子信息学院,云南昆明650500

出　　处：《云南师范大学学报（自然科学版）》2024年第6期1-5,共5页Journal of Yunnan Normal University:Natural Sciences Edition

基　　金：国家自然科学基金资助项目(12263009).

摘　　要：基于平谱射电类星体3C 454.3在2010—2016年间42个时段的光谱能量分布(SED)数据,利用单区均匀轻子模型得到了其光变参数,结果发现:(1)电子谱指数p 1支持光变时的加速机制是斜激波加速;(2)辐射区位置在宽线区之外,尘埃环之内;(3)功率P_(B)<P_(r)<P_(e)<P_(p),P_(p)/P_(jet)=68.6%,说明喷流的大部分能量是由冷质子携带的;(4)均分参数ε大于1的比值为93%,意味着喷流以粒子为主导.The single-zone homogeneous lepton model was used to fit the simultaneous SED data of the flat-spectrum radio quasar 3C 454.3 in 42 periods from 2010 to 2016.The distribution of various parameters during the variability was given,and the acceleration mechanism and the location of the radiation region,peak luminosity and peak frequency,power of each component in the jet,and total power of the jet were analyzed.It is found that:(1)the electron spectral index p 1 supports the acceleration mechanism of the shock acceleration during variability,(2)the radiation region is located outside the broad-line region and inside the dust tours,(3)P_(B)<P_(r)<P_(e)<P_(p) and P_(p)/P_(jet)=68.6%indicate that most of the energy of the jet is carried by cold protons,and(4)the proportion of parameters with an average value ofεgreater than 1 is 93%,indicating that particles dominate the jet.

关 键 词：3C 454.3 光变 SED 

分 类 号：P14[天文地球—天体物理]