摘要
耀变体是一种非常活跃的活动星系核,研究它的有效谱指数是认识其内部结构和辐射机制的有效方法。文中数据来源于目前已公布的SMARTS(Small and Medium Aperture Research Telescope System)数据库,共682组具有B,V,R,J和K波段的准同时性的观测数据,用LSP(LombScargle Periodogram)方法研究了其有效谱指数的特性,研究结果表明,3C 454.3光学和红外波段光变之间呈正相关;光学和红外波段光变存在两个主导周期,分别约为1.2年和4.5年;双黑洞结构模型中双黑洞质量比约为2∶1。
Blazar is a very active AGN.Studying its broad band spectral index is the effective method to understand its internal structure and radiation mechanism.The data in this paper adopts the SMARTS database that has been published so far.There are 682 groups of observation data with quasi-simultaneity in B,V,R,J,K bands.The characteristics of its broad band spectral index are studied using LombScargle Periodogram(LSP)method.The results show that 3C 454.3 optical and infrared band light variations are positively correlated;there are two dominant periods in optical and infrared band,which are about 1.2 yr and 4.5 yr,respectively;in the double black hole structure model,the mass ratio of double black holes is about 2/1.
作者
吴月承
龚云露
封涛涛
Wu Yuecheng;Gong Yunlu;Feng Taotao(General Education Center,Quanzhou University of Information Engineering,Quanzhou 362000,China;School of Physics and Astronomy,Yunnan University,Kunming 650500,China)
出处
《天文研究与技术》
CSCD
2023年第3期204-210,共7页
Astronomical Research & Technology
