T H = ℏ c 3 8 π G M k B {\displaystyle {\displaystyle T_{\mathrm {H} }={\frac {\hbar c^{3}}{8\pi GMk_{\mathrm {B} }}}}}
T H = ρ h ℏ c 3 8 π c 2 β M k B {\displaystyle T_{\mathrm {H} }={\frac {\rho _{h}\hbar c^{3}}{8\pi c^{2}\beta Mk_{\mathrm {B} }}}}