Lomb-Scargle Periodogram方法研究耀变体3C 454.3长周期光变特性  

Studying the Properties of Long-period Light Variation about Blazar 3C 454.3 with the Methods for Lomb-Scargle Periodogram

作　　者：陆林 张皓晶[1] 张欢 马凯旋 Lu Lin;Zhang Haojing;Zhang Huan;Ma Kaixuan(Department of Physics and Electronic Information, Yunnan Normal University, Kunming 650092, 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650092

出　　处：《天文研究与技术》2022年第4期283-290,共8页Astronomical Research & Technology

基　　金：国家自然科学基金(11063004);云南省中青年学术和技术带头人后备人才(2017HB020)资助.

摘　　要：从SMARTS(The Small and Moderate Aperture Research Telescope System)数据库和文献中收集耀变体3C 454.3(z=0.859)从2008年6月到2017年7月光学波段B,V,R和红外波段J,K的数据,分别获得了B波段891组、V波段855组、R波段877组、J波段860组和K波段751组共4234组数据。根据这些观测数据,利用LSP(Lomb-Scargle Periodogram)方法和加权小波Z变换法(Weighted Wavelet Z-transform,WWZ)研究了各个波段的周期,结果表明(1)3C 454.3在光学和红外波段都有454天的光变周期;(2)5个波段存在454天的长周期光变,由此得到3C 454.3中心黑洞质量为M≈0.24×10^(6)M⊙,辐射区半径为R≈3.68×10^(8)km;(3)通过长周期光变分析,预测耀变体3C 454.3在2021年6月左右将再次爆发。In this paper,in order to study the feature of optical and infrared radiation of the Blazar 3C 454.3(z=0.589),data are collected from SMARTS dataset and other literature,involving optical bands B,V,R and infrared bands J,K.The data covers the decade from June 2008 to July 2017,including 891 groups in B-band,855 groups in V-band,877 groups in R-band,860 groups in J-band,and 751 groups in K-band,with 4234 points in total.Using the observed data,we employ LombScargle Periodogram(LSP)and the Weighted Wavelet Z-Transform(WWZ)method to study the possible periods in each band.The results show that:(1)There is a period of 454 days in both optical and infrared bands of 3C 454.3;(2)Using a period of 454 days,we obtain the mass of black hole of 3C 454.3 approximately to be:M≈0.24×10^(6) M⊙and the radius of radiation region:R≈3.68×10^(8) km.(3)Through these analyses,the blazar 3C 454.3 would burst out again around June 2021.

关 键 词：蒙特卡洛模拟 加权小波Z变换 黑洞质量 辐射区半径 

分 类 号：P141.5[天文地球—天体物理]