报告题目：Radiation Properties of the Jets in AGNs: from the Core toExtended Regions
报告人：张晋博士（中国科学院国家天文台）
时间：2018年11月16日，上午10：30-12：00
地点：理学实验楼717
Abstract：On the basis of a large sample of the observed spectralenergy distributions (SEDs) and the leptonic jet model, we studied the jetradiation properties of AGNs at small and large scales. We found that: (1) theflat spectrum radio quasar (FSRQ) jets are highly magnetized with highradiation efficiencies while the BL Lac jets may be dominated by particles withlow radiation efficiencies, and the narrow-lineSeyfert 1 galaxy (NLS1) jets areintermediate between them; (2) GRB jets are highly magnetized with highradiation efficiency, similar to FSRQ jets; (3) the Eddington ratio may be thefundamental parameter to unify the BL Lac–NLS1–FSRQ sequence; (4) Theluminosity ratio of radio to X-ray may be an indicator to distinguish betweenhotspots and knots in large-scale jets of AGNs. And the inverse Comptonscattering of the cosmic microwave background process may be the origin for thehigh-energy emission in large-scale jets.
个人简介：张晋博士于2009年在云南天文台获得博士学位，之后到广西师范学院工作，2011年到国家天文台做博士后研究，2013年博士后出站留在国家天文台工作。近几年，张晋博士主要从事伽玛射线辐射活动星系核相对论喷流物理性质的研究，包括辐射机制，喷流组分，喷流形成机制等等。
