Radiation-pressure instability is an artifact of constant- alpha closure. Implications for AGN disk tensions

arXiv:2606.31998 · astro-ph.HE, astro-ph.IM · Submitted 2026-06-30 · Read on arXiv

M. H. Naddaf, M. Ghasemnezhad, H. Ghanbarnejad, D. Hutsemékers, B. Czerny

astro-ph.HE, astro-ph.IM

Submitted: 2026-06-30

Comments: 9 pages, 3 figures, accepted for publication in A&A

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• AGN — 11× in this paper · explained in 1 episode
• Angular Momentum Transport — 8× in this paper · explained in 3 episodes
• alpha — 8× in this paper · explained in 1 episode
• Limit Cycles — 3× in this paper · explained in 2 episodes
• Microlensing — 3× in this paper · explained in 2 episodes
• Calibration — 2× in this paper · explained in 7 episodes
• Accretion Flows — 1× in this paper · explained in 1 episode
• Anisotropy — 1× in this paper · explained in 3 episodes
• Benchmark — 1× in this paper · explained in 2 episodes
• Consistency — 1× in this paper · explained in 3 episodes
• Trace — 1× in this paper · explained in 2 episodes

Sources

• Universal behaviour of $\alpha$-viscosity in black hole accretion discs

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