基于多波段观测的耀变体能谱分析  

Analysis for the energy spectrum of blazars based on multi-band observation

作　　者：黄宏任 袁聿海[1] HUANG Hong-ren;YUAN Yu-hai(Center for Astrophysics,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学天体物理中心,广东广州510006

出　　处：《广州大学学报（自然科学版）》2023年第2期77-86,共10页Journal of Guangzhou University:Natural Science Edition

基　　金：国家自然科学基金资助项目(U1531245,11403006,10633010)。

摘　　要：文章采用了334个具有射电、中红外、近红外、光学到紫外波段数据的耀变体样本分析光谱特性和谱能量分布。计算出近红外光谱指数(α_(N))、中红外光谱指数(α_(M));基于能谱拟合获得了峰值频率(ν_(p))、峰值光度(L_(p))和抛物线曲率(b)。主要结果如下:(1)在中红外区域,光谱与亮度不存在相关性;在近红外区域,光谱与亮度呈弱反相关关系;在紫外区,光谱与亮度呈较强的反相关关系。(2)对于低峰频耀变体,抛物线曲率b和logυ_(p)具有强相关性;对于中峰频耀变体,抛物线曲率b和logυ_(p)不具有相关性;对于高峰频耀变体,抛物线曲率b和logυ_(p)具有强反相关性。(3)结果表明全部耀变体样本的谱指数α_(R)O、α_(O)U与logυ_(p)之间具有很强的相关性。In this paper,a sample including 334 UV selected blazars is built to analyze the spectral properties and the spectral energy distributions(SEDs).Most of sources have data cover from radio,middle-infrared,near-infrared,optical to ultraviolet band.We calculate the near-infrared spectral indices(αN),and the mid-infrared spectral indices(αM).Based on the SEDs fitting,we obtain the peak frequency(νP),peak luminosity(L p)and the parabolic curve(b).Main results are as follows.①At the mid-infrared region,the spectrum doesn t show correlation with brightness;at the near-infrared region,the spectrum show weak anti-correlation with the brightness;at UV region,the spectrum shows strong anti-correlation with brightness;②For LSP,the parabolic curve b and logυp show strong anti-correlation;for ISP,b and logυp show no correlation;for HSP,the parabolic curve b and logυp show strong anti-correlation;③The result indicates that strong correlations lie betweenαRO、αOU and logυp in the whole samples of blazars,respectively.

关 键 词：耀变体 光谱 能谱 

分 类 号：P157[天文地球—天文学]