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Long-Term Gamma-Ray Flux Trends in Fermi-LAT Jetted Active Galactic Nuclei

A systematic decade-scale search for slow linear or quadratic trends in the gamma-ray flux of jetted active galactic nuclei, distinct from their usual stochastic variability, using about 12 years of Fermi-LAT light curves for thousands of sources. Trends detected in a subset are characterized and interpreted as signatures of supermassive black-hole binary dynamics or intrinsic jet evolution.

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Draft version January 3, 2025 Typeset using LATEX twocolumn style in AASTeX62 Systematic Search for

This paper reports a systematic search for long-term (roughly decade-scale) trends in the gamma-ray brightness of jetted active galactic nuclei observed by the Fermi Large Area Telescope. Using about…