Astrophysics (index)about

brown dwarf

(star-like object with less mass than a star)

A brown dwarf is a star-like object which has too little mass to sustain fusion in the manner of main sequence stars. Their mass is between that of Jupiter and a small star, in the rough range of 10-90 Jupiter masses. They can have spectral classes, M-type star (M dwarf), L-type star (L dwarf), T-type star (T dwarf), or Y-type star (Y dwarf).

Brown dwarfs are identified by the observed presence of lithium and/or methane. The first observed brown dwarf was identified as such in 1995. As of 2013, hundreds of brown dwarfs were known.

(star type)

Referenced by:
Black Widow Pulsar (B1957+20)
carbon planet
direct imaging
Epsilon Indi (ε Indi)
extra-solar planet
giant star
Gliese-Jahreiss Catalog (GJ)
gravitational lensing
H-R diagram (HRD)
L-type star (L)
Luhman 16
MACHO Project
main sequence star
planet formation
Scholz's Star
T-type star (T)
Two Micron All-sky Survey (2MASS)
ultracool dwarf
CTIO Upper-Scorpius OB Association Survey (UScoCTIO)
WISE 0855-0714
WISE 1506+7027
Y-type star (Y)