Extended Data Fig. 3: Thermal and turbulent support of the collapsing core. | Nature

Extended Data Fig. 3: Thermal and turbulent support of the collapsing core.

From: Formation of massive black holes in rapidly growing pre-galactic gas clouds

Extended Data Fig. 3

a, b, Gravitational forces dominate over thermal and turbulent internal pressures within the collapsing core in the MMH (a) and the LWH (b). The thermal sound speed (blue dotted lines) and turbulent root-mean-square velocity (orange dash-dotted line) both contribute to the effective sound speed (black solid line) that provides partial resistance to a catastrophic collapse. The radial infall speed (green dashed line) shows that the flow becomes supersonic at the Jeans mass scale and then transitions to a subsonic flow at smaller mass scales. In the LWH, the radial inflow becomes transonic at a mass scale of 103Mʘ.

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