14–19 Jun 2026
Brindisi
UTC timezone

Modeling of multi-zone Synchrotron polarization of blazars: insights from new data and connection to particle acceleration

16 Jun 2026, 11:30
15m
Sala Conferenze presso Autorità di Sistema Portuale (Brindisi)

Sala Conferenze presso Autorità di Sistema Portuale

Brindisi

Speaker

Andrea Tramacere

Description

I will show that current mm-to-X-ray polarization trends observed during recent IXPE campaigns for high-synchrotron peaked blazars and the ROBOPOL optical envelope observed for Fermi blazars, which relate the fractional polarization to the peak frequency of the synchrotron emission, can be fully accounted for by a purely turbulent, multi-zone model, without requiring correlations between the cell size and the EED parameters. The polarization degree is primarily governed by the effective number of flux-weighted emitting cells, which depends sensitively on the dispersion of cell properties—especially the EED cutoff energy at high frequencies and the low-energy spectral index at low frequencies. I will also discuss some implications of the statistical properties of the polarization on the underlying acceleration processes, and I will present preliminary results from a turbulent multi-zone model within a conical jet with an underlying ordered magnetic field.

Author

Andrea Tramacere

Presentation materials

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