Number density of free particles as a function of distance in the accreting disk, which are plotted for neutrons (solid line), protons (dotted line), electrons (short dashed line), and positrons (long dashed line). The steady-state models were calculated for Ṁ = 1.0 M⊙ s-1 (top panel) and Ṁ = 0.1 M⊙ s-1 (bottom panel). The assumed black hole spin parameter is a = 0.9.
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