[5] An isolated object with less than about 13 Jupiter masses is technically a sub-brown dwarf or rogue planet.
Because the mass of a brown dwarf is between that of a planet and that of a star, they have also been called planetars or hyperjovians.
.32 A stellar remnant can be for example a white dwarf, a pulsar or a black hole.
If they exist as a period bouncer around a white dwarf they are thought to once have been stars and are today "brown dwarf-like objects".
[14] Objects around black widow pulsars on the other hand are thought to be white dwarfs that lost mass to the pulsar and therefore will differ in composition and density compared to brown dwarfs.