Dr. Kohta Murase visit our group and give colloquium speech

Nov 18, 2011

“Multi-Messenger Signatures of Ultra-High-Energy Cosmic Rays”

The origin of ultra-high-energy cosmic rays (UHECRs), has been one of the biggest mysteries in physics and astronomy.  The multi-messenger approach, using neutrinos and gamma rays as well as cosmic rays, is necessary in order to reveal the sources.  Recently a Gton neutrino detector, IceCube, was completed, and several Cherenkov gamma-ray telescopes as well as the gamma-ray satellite Fermi are now operating, so that the era of the multi-messenger observations is coming. 

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Dr. Ding-Xiong Wang (Huazhong University of Science & Technology) visit our group and give colloquium speech

Nov 15, 2011

“Magnetic Extraction of Energy from Black Hole Systems”

Magnetic extraction of energy from black hole (BH) systems is presented, in which three main energy mechanisms, i.e., the Blandford-Payne process, Blandford-Znajek process, and magnetic coupling process, are introduced based on BH accretion. Application of these energy mechanisms to high-energy astrophysics such as GRBs, AGNs and BHXB is briefly discussed.