Tolman–Oppenheimer–Volkoff limit

The Tolman–Oppenheimer–Volkoff limit (or TOV limit) is an upper bound to the mass of cold, non-rotating neutron stars, analogous to the Chandrasekhar limit for white dwarf stars. Stars more massive than the TOV limit collapse into a black hole, or possibly to a quark star.

Source: Wikipedia — Tolman–Oppenheimer–Volkoff limit (CC BY-SA 4.0)