TeV 耀变体的光变与能谱分布研究

目前，有TeV辐射的耀变体才70多个，但它们是研究高能辐射机制、粒子加速类型以及宇宙背景光对TeV辐射影响的重要对象。本项目以现有TeV耀变体为研究对象，利用国台1.26米望远镜对所选TeV耀变体进行密集的g,r,i三通道同时性观测，并申请国内外望远镜（射电、光学、甚至LHASSO）开展观测，进行如下研究：1）光变行为研究，即研究上升与下降光变特征、光变与谱的关系，不同波段之间光变相关，探讨光变物理原因以及基本物理学问题，希望观测到与中微子事件成协的TeV源的耀发；2）用理论模型拟合不同状态下多波段能谱分布，对模型进行限制，并研究喷流中的粒子加速类型；3）研究高能截止的起源，讨论背景光对TeV辐射的影响；4）通过发射线与高能辐射资料，研究吸积模式、吸积和喷流的关系；5）研究TeV耀变体与射电星系的关系；此外，用机器学习方法获得TeV耀变体候选体，扩大样本，对它们进行观测和开展相应研究。

At present, there are about 70 blazars detected to show TeV emissions, but they are important objects for studying the mechanism of high-energy emission, the acceleration mechanism of particles, and the effects of cosmic background radiation on TeV emissions. In this proposal, we will use the 1.26-meter telescope at the National Astronomical Observatories of China to carry out intensively optical g, r, i three-channel simultaneous observations for the selected TeV blazar sample, and apply for observation time allocations from domestic and international telescopes (radio, optical, and even LHASSO) to conduct observations, and focus on the following studies: 1) Variability behavior studies: To study the variability properties for rising and decreasing variabilities, the relationships between variability and spectrum, the variability correlation between different bands, the physics causes of variability in TeV blazars, and even the Fundamental Physics. In addition, we hope to find associations between optical flares with neutrino events; 2) To fit the multiwavelength spectrum energy distribution at different states with the theoretical models, constrain the theoretical models, and investigate the acceleration mechanism of particles in the jets; 3) To study the origin of the high-energy cut-off and investigate the effects of background lights on the TeV emissions; 4) To study the accretion modes, the relationship between accretion and jet using the emission line and high energy data; 5) To study the relation between TeV blazars and FR galaxies. In addition, we will select TeV blazar candidates using machine learning methods to enlarge the sample of TeV blazars, and carry out similar studies as for known TeV blazars.