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Peer-reviewedCC BY 4.0The Astrophysical Journal

Unveiling the Emission Mechanisms of Blazar PKS 1510−089. III. Relationship between the γ-Ray Variability and the Parsec-scale Jet

  • Eva M. Palafox1,2,3
  • Alfredo Amador-Portes1
  • Jonhatan U. Guerrero-González1
  • Víctor M. Patiño-Álvarez1,2
  • Vahram Chavushyan1
  • Sergio A. Dzib2
  • Andrei P. Lobanov2
  • J. Anton Zensus2
  1. 1Instituto Nacional de Astrofísica
  2. 2Max-Planck-Institute für Radioastronomie
  3. 3Tecnológico de Monterrey
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Abstract

Over a 17 yr period, we analyze the multiwavelength relationship in the blazar PKS 1510-089, utilizing γ -ray, multifrequency radio (15, 43, and 230 GHz), optical spectra, and photometric data. Spearman rank correlations suggest that γ -ray production is cospatial with the 43 GHz quasi-stationary core (Q0), while the remaining decoupled from the 15 GHz core ( K 0) due to frequency-dependent opacity. A kinematic analysis identified nine superluminal components (Q2 − Q10) and a stationary feature (Q1) at ∼2.0 pc that we interpret as a downstream accelerator. To investigate the long-term evolution of jet opacity and flaring dynamics, we performed a time-resolved cross correlation analysis by dividing the dataset into four temporal epochs characterized by distinct quiescent γ -ray states. These results reveal that the kinematic transitivity of the jet is state dependent: while plasma disturbances propagate through successive τ ∼ 1 surfaces with clear, resolvable delays during quiescent and discrete flaring epochs, massive energy injections act as a low-pass filter, where extreme optical depth and spatial blending temporarily disrupt this kinematic coherence. Finally, the emergence of component Q10 in 2024 as a γ -ray dark event suggests a fundamental restructuring of the radiative environment of the jet following the 2021 high-energy quenching, likely driven by a depletion of external seed photons or enhanced internal γ -ray opacity.

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Cite

BibTeXRIS
BibTeX
@article{palafox2026unveiling,
  title = {{Unveiling the Emission Mechanisms of Blazar PKS 1510−089. III. Relationship between the γ-Ray Variability and the Parsec-scale Jet}},
  author = {Eva M. Palafox and Alfredo Amador-Portes and Jonhatan U. Guerrero-González and Víctor M. Patiño-Álvarez and Vahram Chavushyan and Sergio A. Dzib and Andrei P. Lobanov and J. Anton Zensus},
  journal = {The Astrophysical Journal},
  year = {2026},
  month = nov,
  doi = {10.3847/1538-4357/aea8f9},
  url = {https://iopscience.iop.org/article/10.3847/1538-4357/aea8f9},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Unveiling the Emission Mechanisms of Blazar PKS 1510−089. III. Relationship between the γ-Ray Variability and the Parsec-scale Jet
AU  - Eva M. Palafox
AU  - Alfredo Amador-Portes
AU  - Jonhatan U. Guerrero-González
AU  - Víctor M. Patiño-Álvarez
AU  - Vahram Chavushyan
AU  - Sergio A. Dzib
AU  - Andrei P. Lobanov
AU  - J. Anton Zensus
PY  - 2026
DA  - 2026/11/03
JO  - The Astrophysical Journal
DO  - 10.3847/1538-4357/aea8f9
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/aea8f9
AB  - Over a 17 yr period, we analyze the multiwavelength relationship in the blazar PKS 1510-089, utilizing γ -ray, multifrequency radio (15, 43, and 230 GHz), optical spectra, and photometric data. Spearman rank correlations suggest that γ -ray production is cospatial with the 43 GHz quasi-stationary core (Q0), while the remaining decoupled from the 15 GHz core ( K 0) due to frequency-dependent opacity. A kinematic analysis identified nine superluminal components (Q2 − Q10) and a stationary feature (Q1) at ∼2.0 pc that we interpret as a downstream accelerator. To investigate the long-term evolution of jet opacity and flaring dynamics, we performed a time-resolved cross correlation analysis by dividing the dataset into four temporal epochs characterized by distinct quiescent γ -ray states. These results reveal that the kinematic transitivity of the jet is state dependent: while plasma disturbances propagate through successive τ ∼ 1 surfaces with clear, resolvable delays during quiescent and discrete flaring epochs, massive energy injections act as a low-pass filter, where extreme optical depth and spatial blending temporarily disrupt this kinematic coherence. Finally, the emergence of component Q10 in 2024 as a γ -ray dark event suggests a fundamental restructuring of the radiative environment of the jet following the 2021 high-energy quenching, likely driven by a depletion of external seed photons or enhanced internal γ -ray opacity.
SN  - 1538-4357
SN  - 0004-637X
ER  -