Using simultaneous modeling of continuum lag-spectrum and broadband SED of Fairall 9 with the H0RIZON-AGN model, the authors obtain H0 = 72.4_{-3.7}^{+3.4} km s^{-1} Mpc^{-1}.
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Requiring thin-disk solutions to be thermally stable and single-valued imposes η_x ≡ dlnα/dlnX > 4/7, and a viscosity law α∝X^p with p>4/7 removes the radiation-pressure unstable branch.
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HALO II: Constraining Hubble constant $H_{0}$ through continuum delay fitting of Fairall 9
Using simultaneous modeling of continuum lag-spectrum and broadband SED of Fairall 9 with the H0RIZON-AGN model, the authors obtain H0 = 72.4_{-3.7}^{+3.4} km s^{-1} Mpc^{-1}.
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Radiation-pressure instability is an artifact of constant-$\alpha$ closure. Implications for AGN disk tensions
Requiring thin-disk solutions to be thermally stable and single-valued imposes η_x ≡ dlnα/dlnX > 4/7, and a viscosity law α∝X^p with p>4/7 removes the radiation-pressure unstable branch.