Fast giant flares in discs around supermassive black holes

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Fig. 5.

Critical values of surface density (8) for M = 10⁷ M_⊙. The viscous parameter is α_cold = 0.01 for Σ⁻ (blue line) and α_hot = 0.1 in all other dependencies (orange lines). The relations Σ_A and Σ_A′ show the results of different codes (see Sect. 3.1).

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