Fig. 4.

Translational and rotational temperatures of a nearly neutrally buoyant nanoparticle in a stationary fluid medium as a function of the particle density normalized with fluid density. The nondimensionalized characteristic memory times are ${\tau }_1\text{/}{\tau }_{\mathrm{\nu }}\hspace{1em}=\hspace{1em}0.12$ and ${\tau }_2\text{/}{\tau }_{\mathrm{\nu }}\hspace{1em}=\hspace{1em}0.088$.