APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Koichi Hirotani (ASIAA)
Title: To what extent do we understand pulsars?
Date (JST): Wed, Oct 01, 2014, 16:00 - 17:00
Place: Seminar Room A
Abstract: In the high-energy (HE) regime, the Fermi has detected pulsed signals from more than 100 rotation-powered pulsars between 100 MeV and 20 GeV. In addition, in the very-high-energy (VHE) regime, the VERITAS and MAGIC experiments have detected pulsed signals in 20-400 GeV. Their observed light curves and the spectra suggest that the gamma-ray pulsars have high-altitude emission zones, which naturally explain the double-peak pulse profiles and avoid super-exponential cutoff due to magnetic pair production near the neutron star. I thus develop the outer-magnetospheric emission model and constrain the gamma-ray emission site and the physical conditions there, comparing the theoretical predictions with gamma-ray observations.