Active Processes in Central Regions of Galaxies

Emeritus Professor Cheng, Kwong Sang   (Principal Investigator (PI))

Professor Dogiel V.A.   (Co-Investigator)

Professor Zou Yuan-Chuan   (Co-Investigator)

42

2016-09-01

326811

Active Processes in Central Regions of Galaxies

high energy processes, radiation emission mechanism, shock acceleration, stellar capture process, supermassive black holes

Physics,Others - Physical Sciences

Physical Sciences (P)

17310916

General Research Fund (GRF)

2016

Completed

1 Studying different processes inside and outside the galactic centers, which include tidal disruption, jets formation and their dissipation in the nearby medium by heating of the interstellar plasma, propagation of shocks produced by the tidal disruption in the exponential atmosphere of galactic halos, parameters of shock acceleration in the halo or acceleration by MHD turbulence excited behind the shocks, processes of emission by the accelerated particles in shocks etc. One important emission region is the Fermi Bubbles. 2 Studying other active processes in central regions of galaxies, which include the long term X-ray emission processes of Swift J1644 +57, origin of large positron annihilation rate in the Galactic center, origin of X-ray emission lines, origin of sub-relativistic cosmic rays etc. All these phenomena may provide important clues for understanding what have been happened in the past in our Galactic center.