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Extreme Variability Reveals How the Eddington Ratio Regulates Coronal Power in Active Galactic Nuclei

  • Authors: Arghajit Jana, Claudio Ricci, Franz E. Bauer, Kriti Kamal Gupta, Benny Trakhtenbrot, Alessia Tortosa, Ruancun Li, Luis C. Ho, Richard Mushotzky, Hsiang-Kuang Chang, Yaherlyn Diaz, Georgios Dimopoulos, Kristína Kallová, Michael J. Koss, Stéphane Paltani, Matthew J. Temple

Arghajit Jana et al 2026 The Astrophysical Journal Letters 1007 .

  • Provider: AAS Journals

Caption: Figure 4.

Blue circles and gray squares represent the variation of the X-ray bolometric correction (κ2−10) as a function of the Eddington ratio (λEdd) for the variable AGN studied here and for unobscured AGNs in BASS from K. K. Gupta et al. (2025), respectively. The blue dashed–dotted and orange solid lines represent the best fit for our sample (Equation (3)) and unobscured BAT AGNs (Equation (2) of K. K. Gupta et al. 2025), respectively. The red dotted line shows the best-fit relation of κ2−10λEdd for unobscured BAT AGNs with high-redshift quasars, taken from K. K. Gupta et al. (2025). The green dashed line shows the κ2−10λEdd relation from F. Duras et al. (2020). The blue shaded region represents the 1σ scatter from the present study.

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