Astrophysics (index)about

Brown Dwarf

(BD)
(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)
http://en.wikipedia.org/wiki/Brown_dwarf

Referenced by:
Black Widow Pulsar (B1957+20)
BT-Settl
Carbon Planet
CFBDS
Direct Imaging
Epsilon Indi (ε Indi)
EROS
Extra Solar Planet
Giant Star
Gliese-Jahreiss Catalog (GJ)
Gravitational Lensing
H-R Diagram (HRD)
L-Type Star (L)
MACHO
MACHO Project
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 1506+7027
Y-Type Star (Y)

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