Knot in Cen A: Stochastic Magnetic Field for Diffusive Synchrotron Radiation?

Abstract

The emission of relativistic electrons moving in the random and small-scale magnetic field is presented by diffusive synchrotron radiation (DSR). In this Letter, we revisit the perturbative treatment of DSR. We propose that random and small-scale magnetic field might be generated by the turbulence. As an example, multi-band radiation of the knot in Cen A comes from the electrons with energy ${\gamma }_e\sim 10^3-10^4$ in the magnetic field of $10^{-3}G$. The multi-band spectrum of DSR is well determined by the feature of stochastic magnetic field. These results put strong constraint to the models of particle acceleration.

accepted by ApJL, comments are welcome

References in corpus (5)

• Simulations of nonhelical hydromagnetic turbulence
• The infrared jet in Centaurus A: multiwavelength constraints on emission mechanisms and particle acceleration
• Baryon loading and the Weibel instability in gamma-ray bursts
• Particle acceleration at shock waves: particle spectrum as a function of the equation of state of the shocked plasma
• Topical Issues for Particle Acceleration Mechanisms in Astrophysical Shocks

Cited by in corpus (2)

• Gamma Rays from Centaurus A
• Radiation from relativistic jets