高红移伽玛射线耀变体的多波段观测与研究

作为银河系外主要的伽玛射线辐射源和宇宙中最剧烈的天体之一，耀变体是少数能够直接研究超大质量黑洞周围极端环境的重要探针。研究高红移耀变体对研究活动星系核喷流性质的宇宙学演化和理解宇宙早期超大质量黑洞的形成与质量增长能够提供有效的帮助。本项目在收集分析国外多波段巡天的公开数据的基础上，拟使用中国科学院天文台的光学望远镜及光学巡天数据，从多波段观测的角度研究高红移伽玛射线耀变体。我们力求搜寻最遥远的GeV伽玛射线辐射源并扩大高红移伽玛射线耀变体的探测数目。与此同时，我们拟深入研究高红移伽玛射线耀变体的多波段光变特性。此外，我们还将开展限制河外背景光模型和重构平谱射电类星体伽玛射线光度函数的研究工作。本项目预期将在部分方向上得到重要进展。

As the dominant population of the extragalactic gamma-ray emitters and one of the most energetic phenomena in the universe, blazars are important probes that shed lights on the extreme environment around supermassive black holes (SMBHs). Specially, studies of high redshift blazars are helpful for cosmic evolution of jets in active galactic nuclei and understanding the formation and mass growth of the first generation of SMBHs. In addition to adopting the archival data from the astronomical survey worldwide, we propose to use optical telescopes as well as optical survey data from observatories of Chinese academy of sciences and perform multi-wavelength observational studies on high redshift gamma-ray blazars. In this project, we aim to search new sources that might be the most distant GeV gamma-ray emitters. Meanwhile, multi-wavelength variability properties of high redshift gamma-ray blazars will be investigated. Furthermore, efforts to constrain models of the extragalactic background light as we as re-construct the gamma-ray luminosity function of flat spectrum radio quasars will be made. Significant progresses are expected.