Blazars的长期谱变化性质  

The long-term spectral variation of blazars

作　　者：熊禄棋 袁聿海[1] 黎智轩 陈开帅 黄韵源 Xiong Luqi;Yuan Yuhai;Li Zhixuan;Chen Kaishuai;Huang Yunyuan(Department of Physics,Guangzhou University,Guangzhou 510006,China;International Department of High School Affiliated to South China Normal University,Guangzhou 510635,China)

机构地区：[1]广州大学物理与材料科学学院,广东广州510006 [2]华南师范大学附属中学国际部,广东广州510635

出　　处：《湖南文理学院学报（自然科学版）》2023年第1期13-19,49,共8页Journal of Hunan University of Arts and Science(Science and Technology)

基　　金：国家自然科学基金(NSFC U1831119,USFC U1531245,NSFC U1431112)。

摘　　要：基于美国SMARTS数据库,本工作选择了3个耀变体(OJ 287、PKS 1510-089和3C 454.3)多个波段的测光数据进行处理分析。分析方法选用功率谱法、DCF法、Jurkevich法等3种受数据分布的影响较小的计算方法,研究了谱指数的长期变化性质。主要结果为:(1)对于OJ 287,谱指数的变化周期为P_(1)=0.99 a,P_(2)=2.60 a;对于PKS 1510-089,P_(1)=0.45 a,P_(2)=1.01 a;对于3C 454.3,P_(1)=0.56 a,P_(2)=1.15 a,P_(3)=4.99 a;(2)光变曲线与谱指数变化周期之间存在时间延迟(τ),对于OJ 287,τ=−(9.57±0.14)d;对于PKS 1510-089,τ=(3.87±1.38)d;对于3C 454.3,τ=−(8.54±0.59)d。这种时间延迟,意味着两者的来源存在一定的差异。Based on the SMARTS database in the United States,this work selects the metering data of multiple bands of three blazars(OJ 287,PKS 1510-089 and 3C 454.3)for processing and analysis.The three calculation methods are power spectroscopy,DCF method and Jurkevich method that are less affected by the data distribution,so as to study the long-term variation properties of spectral index.The main outcomes are as follows:(1)for OJ 287,the period of the spectral indexes variation are P_(1)=0.99 yr,P_(2)=2.60 yr;for PKS 1510-089,P_(1)=0.45 yr,P_(2)=1.01 yr;and for FSRQ 3C454.3,P_(1)=0.56yr,P_(2)=1.15yr,P_(3)=4.99 yr;(2)there is a time delay(τ)between the light curve and the period of the spectral indexes variation,and for OJ 287,τ=−9.57±0.14 days;for PKS 1510-089,τ=3.87±1.38 days;for FSRQ 3C454.3,τ=−8.54±0.59 days.This time delay implies that there is a certain difference between the sources of the two.

关 键 词：耀变体 测光 谱指数 

分 类 号：P1[天文地球—天文学]