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Radiation Properties of the Jets in AGNs: from the Core to Extended Regions

  • 2018年秋季

题目:Radiation Properties of the Jets in AGNs: from the Core to Extended Regions

报告人:张晋 博士, 中科院国家天文台

时间地点:周四, 2018.09.20下午2:30-4:30, 物理楼573

Abstract: 

On the basis of a large sample of the observed spectral energy distributions (SEDs) and the leptonic jet model, we studied the jet radiation properties of AGNs at small and large scales. We found that: (1) the flat spectrum radio quasar (FSRQ) jets are highly magnetized with high radiation efficiencies while the BL Lac jets may be dominated by particles with low radiation efficiencies, and the narrow-line Seyfert 1 galaxy (NLS1) jets are intermediate between them; (2) GRB jets are highly magnetized with high radiation efficiency, similar to FSRQ jets; (3) the Eddington ratio may be the fundamental parameter to unify the BL Lac–NLS1–FSRQ sequence; (4) The luminosity ratio of radio to X-ray may be an indicator to distinguish between hotspots and knots in large-scale jets of AGNs. And the inverse Compton scattering of the cosmic microwave background process may be the origin for the high-energy emission in large-scale jets.




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