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(Dec. 14) Magnetically driven outflows from accretion disks in X-ray binaries and active galactic nuclei

Last updated :2017-12-12

Topic: Magnetically driven outflows from accretion disks in X-ray binaries and active galactic nuclei
Speaker: Professor CAO Xinwu
(Shanghai Astronomical Observatory, Chinese Academy of Sciences)
Invited by: Professor LIN Weipeng
Time: 15:00-16:00, Thursday, December 14, 2017
Venue: Room 107, Red House 17, Zhuhai Campus, SYSU

Abstract:
The jets/outflows can be accelerated by the large scale magnetic fields threading the accretion disks. Large-scale magnetic field is a key ingredient in jet formation mechanisms. We briefly describe how the large-scale field is formed in accretion disks. We find that some puzzling observational features in X-ray binaries and active galactic nuclei, such as, 1. the hysteretic state transition observed in X-ray binaries; 2. why do only a small fraction of quasars have jets? 3. steady jets are present only in low/hard state of X-ray binaries, can be explained with accretion disk-outflow models.