| Speaker: | Kouichi Hirotani (National Tsing Hua University, Taiwan) |
|---|---|
| Title: | Pulsars: excellent systems for testing particle acceleration theories |
| Date (JST): | Mon, Mar 16, 2009, 15:30 - 17:00 |
| Place: | Seminar Room at IPMU Prefab. B |
| Related File: | 14.pdf |
| Abstract: |
The study of emission from rotation-powered pulsars is undergoing a major advance with the successful launch of the two gamma-ray space telescopes, AGILE and Fermi. Theoretical attempts to explain these high-energy emissions have concentrated on two scenarios: The slot-gap (SG) model, an extension of the conventional polar-cap model into the higher altitudes, and the outer-gap (OG) model in which the gap is located typically a few hundred neutron-star radii away from the star. In this talk, I will solve the electrodynamics of particle accelerators from the first principles for the first time and demonstrate that (1) the SG does not exist as a solution of the basic equations, (2) the SG model cannot reproduce observations even if it exists, (3) the obtained solution corresponds to a quantitative extension of the traditional OG models and reproduces the observations. |
