Synchrotron Gamma-Ray Emission Model of the Giant Outburst of Quasar 3C 279 in 2015 June: Fast Reconnection or Stochastic Acceleration with Electromagnetic Cascade?
arXiv:2001.04649 · doi:10.3847/1538-4357/ab6a93
Abstract
We test the synchrotron emission scenario for the very bright gamma-ray flare of blazar 3C 279 observed in 2015 June using time-dependent numerical simulations. A bulk Lorentz factor as high as 100 can bring the synchrotron maximum energy above the GeV energy range. We find two possible solutions for the X-ray to gamma-ray spectrum. One is a prompt electron injection model with a hard power-law index as magnetic reconnection models suggest. A too strong magnetic field yields a too bright synchrotron X-ray flux due to secondary electron--positron pairs. Even in the prompt electron injection model, the Poynting flux luminosity is at most comparable to the gamma-ray or electron luminosity. Another model is the stochastic acceleration model, which leads to a very unique picture accompanying the electromagnetic cascade and re-acceleration of the secondary electron--positron pairs. In this model, the energy budget of the magnetic field is very low compared to gamma rays and electrons.
arXiv comment7 pages, 5 figures, accepted for publication in ApJ
References in corpus (18)
- Spectra and Light Curves of Gamma-Ray Burst Afterglows
- An Exceptional VHE Gamma-Ray Flare of PKS 2155-304
- Relativistic Reconnection: an Efficient Source of Non-Thermal Particles
- Constraining Emission Models of Luminous Blazar Sources
- Simulations of particle acceleration beyond the classical synchrotron burnoff limit in magnetic reconnection: An explanation of the Crab flares
- Minute-Timescale >100 MeV gamma-ray variability during the giant outburst of quasar 3C 279 observed by Fermi-LAT in 2015 June
- Analytical solutions for energy spectra of electrons accelerated by nonrelativistic shock-waves in shell type supernova remnants
- Rapid Variability of Blazar 3C 279 during Flaring States in 2013-2014 with Joint Fermi-LAT, NuSTAR, Swift, and Ground-Based Multi-wavelength Observations
- The structure and emission model of the relativistic jet in the quasar 3C 279 inferred from radio to high-energy gamma-ray observations in 2008-2010
- Ultraviolet and Multiwavelength Variability of the Blazar 3C 279: Evidence for Thermal Emission
- Particle Acceleration by MHD Turbulence
- Time-Dependent Models for Blazar Emissions with the Second-Order Fermi Acceleration
- Constraints on the emission region of 3C 279 during strong flares in 2014 and 2015 through VHE gamma-ray observations with H.E.S.S
- The Most Intensive Gamma-Ray Flare of Quasar 3C 279 with the Second-Order Fermi Acceleration
- Blazar Spectra with Hard-sphere-like Acceleration of Electrons
- A hadronic minute-scale GeV flare from quasar 3C 279?
- Particle Energy Diffusion in Linear Magnetohydrodynamic Waves
- Synchrotron Self-Compton Model for PKS 2155-304