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- W4379230378 abstract "Blazar emission is dominated by nonthermal radiation processes that are highly variable across the entire electromagnetic spectrum. Turbulence, which can be a major source of nonthermal particle acceleration, can widely exist in the blazar emission region. The Turbulent Extreme Multi-Zone (TEMZ) model has been widely used to describe turbulent radiation signatures. Recent particle-in-cell (PIC) simulations have also revealed the stochastic nature of the turbulent emission region and particle acceleration therein. However, radiation signatures have not been systematically studied via first-principle-integrated simulations. In this paper, we perform combined PIC and polarized radiative transfer simulations to study synchrotron emission from magnetic turbulence in the blazar emission region. We find that the multi-wavelength flux and polarization are generally characterized by stochastic patterns. Specifically, the variability time scale and average polarization degree (PD) are governed by the correlation length of the turbulence. Interestingly, magnetic turbulence can result in polarization angle (PA) swings with arbitrary amplitudes and duration, in either directions, that are not associated to changes in flux or PD. Surprisingly, these swings, which are of stochastic nature, can appear either bumpy or smooth, although large amplitude swings ($>180^{circ}$) are very rare as expected. Our radiation and polarization signatures from first-principle-integrated simulations are consistent with the TEMZ model." @default.
- W4379230378 created "2023-06-04" @default.
- W4379230378 creator A5002841671 @default.
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- W4379230378 date "2023-06-01" @default.
- W4379230378 modified "2023-09-24" @default.
- W4379230378 title "First-principles-integrated Study of Blazar Synchrotron Radiation and Polarization Signatures from Magnetic Turbulence" @default.
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- W4379230378 doi "https://doi.org/10.3847/1538-4357/acc657" @default.
- W4379230378 hasPublicationYear "2023" @default.
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