Fig. 3.
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Column structure according to the model of Postnov et al. (2015). Green lines show the contours of the dimensionless velocity squared, Q, for an accretion column of radius rAC = 647 m accreting with a rate of Ṁ = 5 × 1017 g s−1 and an initial free fall velocity of v0 = 1 × 1010 cm s−1. The temperature, T, throughout the column is indicated by the color map.
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