Abstract
The internal-shocks scenario in relativistic jets has been used to explain the variability of blazars’ outflow emission. Recent simulations have shown that the magnetic field alters the dynamics of these shocks producing a whole zoo of spectral energy density patterns. However, the role played by magnetization in such high-energy emission is still not entirely understood. With the aid of Fermi’s second LAT AGN catalog, a comparison with observations in the γ-ray band was performed, in order to identify the effects of the magnetic field.
Highlights
Relativistic outflows have been observed extensively in blazars, a class of radio-loud active galactic nuclei (AGNs) whose jets are pointing very close to the line of sight towards the observer [1], and known for showing the most rapid variability of all AGNs
In [6] we studied a large number of shell collisions with different magnetization levels
In the present work we focus on a limited number of shell magnetization levels, but vary other parameters such as the jet viewing angle, bulk Lorentz factor of the shells, and their relative Lorentz factor
Summary
Relativistic outflows have been observed extensively in blazars, a class of radio-loud active galactic nuclei (AGNs) whose jets are pointing very close to the line of sight towards the observer [1], and known for showing the most rapid variability of all AGNs. The IS scenario is an idealized model of a variable jet where an intermittently working central engine ejects shells of magnetized plasma which collide due to their velocity differences. In [6] we studied a large number of shell collisions with different magnetization levels. In the present work we focus on a limited number of shell magnetization levels, but vary other parameters such as the jet viewing angle, bulk Lorentz factor of the shells, and their relative Lorentz factor. The data obtained from these simulations is used to categorize the specific effects that variations of each parameter have on average spectra. These synthetic observations are compared with the second LAT AGN catalog (2LAC) of blazars observed by Fermi [7]
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