BD

Brown Dwarf

Stellar evolution Stars
Brown dwarf

Type of substellar object larger than a gas giant

A brown dwarf is a type of substellar object that has a mass between those of the heaviest gas giant planets and the least massive stars, i.e. about 13 to 75–80 times that of Jupiter (MJ), or about 2.5×1028 kg to 1.5×1029 kg. Below this range are the sub-brown dwarfs (sometimes referred to as rogue planets), and above it are the red dwarfs. Brown dwarfs may be fully convective, with no layers or chemical differentiation by depth.

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