 Low-angular-momentum baryonic disk estimate

ID: low-angular-momentum-baryonic-disk-estimate

Selecting a baryonic mass

M_{b}

from a normalized cumulative distribution

M_{b} (< j) \propto j

j_{d} = (M_{b} / M_{b, tot}) j_{vir}

. With circular support and dominant enclosed baryonic gravity, the outer radius is

r_{d} ≃ j_{d}^{2} / (G M_{b})

v_{d} ≃ G M_{b} / j_{d}

j_{d} /2

, which defines a different one-zone radius. The estimate assumes energy dissipation but negligible redistribution of specific angular momentum.

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