Some internal properties of TNG50 465255. Panel (a): Probability density of stars on dynamical hot orbits with λ_z <  0.5 as a function of radius, Panel (b): Metallicity distribution of stars on the hot orbits as a function of radius. Panel (c): Stellar age distribution of different components. Stars in the hot inner stellar halo are younger than those in the bulge, similar to what we found for NGC 1427.