2-6 September 2024
CJD Bonn Castell
Europe/Berlin timezone
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Contribution

CJD Bonn Castell

Beyond the Core: Unveiling Multiple Gamma-Ray Production Zones in Blazar 3C 454.3

Speakers

  • Mrs. Eva PALAFOX

Primary authors

Content

We present a multi-wavelength analysis of the gamma-ray emission mechanisms within blazar 3C 454.3. Using 12 years of gamma-ray data alongside multi-epoch VLBA observations at 15 and 43 GHz, we explore the correlation between jet features and gamma-ray activity. Our analysis reveals a significant correlation between gamma-ray flux and core emission at 43 GHz and 15 GHz, suggesting these core regions contribute substantially (37% and 30%, respectively) to the overall gamma-ray production. Furthermore, a quasi-stationary 43 GHz component at 4.6 pc and a mobile 43 GHz feature (0.8-2.3 pc, βapp = 9.9 ± 1.1 c) exhibit strong correlations with gamma-ray variations, contributing 18% and 26% to the high-energy emission, respectively. The observed co-variability across these extended jet regions strongly suggests Synchrotron Self-Compton (SSC) as the primary gamma-ray production mechanism. Our discovery of a high-speed component (βapp = 9.9 ± 1.1 c) contributing to gamma-ray emission significantly challenges existing theoretical models. Our findings highlight the potential presence of multiple, and potentially non-stationary, gamma-ray emitting regions within blazar jets, furthering our understanding of blazar complexity and SSC processes.