Brown dwarfs Brown dwarfs 15 Sagittae (15 Sge) is a 6th magnitude star in the constellation Sagitta. In 2002, a brown dwarf was discovered around 15 Sge. ...more on Wikipedia about "15 Sagittae"
2M1207, 2M1207A or 2MASSWJ 1207334-393254 is a brown dwarf star located at in the constellation Hydra; a companion object, 2M1207b, is believed to be one of the first extrasolar planets to be directly imaged, and is the first exoplanet to be discovered in orbit of a brown dwarf. ...more on Wikipedia about "2M1207"
Brown dwarfs are sub- stellar objects (~5 to 90 Jupiter masses) that do not fuse hydrogen-1 into helium and heavier elements in their cores, as do stars on the main sequence, but have fully convective surfaces and interiors, with no chemical differentiation by depth. There is some question as to whether brown dwarfs are required to have experienced fusion at some point in their history; in any event, brown dwarfs heavier than 13 Jupiter masses () do fuse deuterium. ...more on Wikipedia about "Brown dwarf"
Epsilon Indi (ε Ind / ε Indi) is a star approximately 11.82 light years from Earth's solar system. ...more on Wikipedia about "Epsilon Indi"
Gliese 229 (also written as Gl 229 or GJ 229) is a cool, red dwarf star about 19 light years away in the constellation Lepus. The star is known to be a flare star. In 1995 a substellar companion was found: Gliese 229B is a brown dwarf orbiting the star; although it is too small to sustain nuclear fusion, with a mass of 20 to 50 times that of Jupiter it is still too massive to be a planet. ...more on Wikipedia about "Gliese 229"
OTS 44 is a brown dwarf in the Chamaeleon constellation. Prior to the discovery of Cha 110913-773444 it was the smallest known brown dwarf. ...more on Wikipedia about "OTS 44"
Planetars are used in astronomy to represent one of two concepts: ...more on Wikipedia about "Planetar (astronomy)"
Sub-brown dwarfs or brown sub-dwarfs are cold masses smaller than the low-mass cut-off for brown dwarfs. These generally are referred to as planets. However, a sub-brown dwarf is formed in the manner of stars, through the collapse of a gas cloud, and not through accretion or core collapse from a circumstellar disc. The distinction between a sub-brown dwarf and a planet is unclear, astronomers are divided into two camps as whether to consider the formation proces of a planet as part of its division in classification. ...more on Wikipedia about "Sub-brown dwarf"
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