26-30 October 2015
Asia/Tokyo timezone

Stochastic Particle Acceleration and Photon Emission in Blazars

26 Oct 2015, 15:45
Room 5.6 ()

Room 5.6

Oral presentation Gamma-ray Astrophysics Gamma-Ray Astrophysics


Dr Katsuaki Asano


Multi-wavelength observations of blazars have revealed curved feature in photon spectrum. Moreover, in some cases, the required electron spectral index at injection becomes harder than 2. In order to reproduce such a curved electron spectrum, we discuss the second order Fermi acceleration by turbulence in the jet. Here, we focus on the time-dependent effects of the electron acceleration and injection. We numerically follow the temporal evolution of the electron spectrum in the jet. We show that the resultant photon spectra well agree with the various observed spectra of 1ES 1101, Mrk 421, and 3C 279. Especially, the light curve and spectrum of the recent intensive flare in 3C 279 are both reproduced by our simple model. Therefore, this stochastic acceleration model can be a reasonable explanation for the electron acceleration in blazars.

Primary author


Prof. Fumio Takahara (Osaka Univ.) Mr Jun Kakuwa (Hiroshima Univ.) Dr Kenji Toma (Tohoku U.) Dr Masaaki Hayashida (ICRR, U. Tokyo) Prof. Masaaki Kusunose (Kwansei Gakuin University)

Presentation Materials