The broadband spectral energy distributions of SDSS blazars
The broadband spectral energy distributions of SDSS blazars作者机构:Physics Department Yuxi Normal University Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial EnvironmentInstitute of Space Sciences Shandong University Physics Department Yunnan Normal University
出 版 物:《Research in Astronomy and Astrophysics》 (天文和天体物理学研究(英文版))
年 卷 期:2015年第15卷第7期
页 面:929-938页
核心收录:
学科分类:07[理学] 070401[理学-天体物理] 0704[理学-天文学]
基 金:Supported by the National Natural Science Foundation of China
主 题:galaxies: active BL Lacertae objects: general galaxies: fundamentalparameters quasars: general
摘 要:We compiled the radio, optical and X-ray data of blazars from the Sloan Digital Sky Survey database, and presented the distribution of luminosities and broadband spectral indices. The distribution of luminosities shows that the averaged luminosity of flat spectrum radio quasars(FSRQs) is larger than that of BL Lacertae(BL Lac) objects. On the other hand, the broadband spectral energy distribution reveals that FSRQs and low energy peaked BL Lac objects have similar spectral properties,but high energy peaked BL Lac objects have a distinct spectral property. This may be due to the fact that different subclasses of blazars have different intrinsic environments and are at different cooling levels. Even so, a unified scheme is also revealed from the color-color diagram, which hints that there are similar physical processes operating in all objects under a range of intrinsic physical conditions or beaming parameters.