Astrophysics (Index)About

red dwarf

(small, cool main-sequence star)

A red dwarf is a small M-type star (M dwarf). Sometimes the term is used to include K-type stars (K dwarfs), but those can be referred to as orange dwarfs. The mass range is from 0.075 to about 0.5 solar mass. The surface temperature is 2000-4000 K. Red dwarfs make up about 75% of the stars in the Milky Way, and many of the nearest stars are red dwarfs. They have become of interest in the search for habitable extra-solar planets because there are so many (thus host many planets), so many are close (allowing planet study), and their relative dimness is conducive to direct imaging of the planets. Red dwarf examples:

(star type)
Further reading:

Referenced by pages:
AD Leonis (AD Leo)
Alpha Centauri
Barnard's Star
California-Kepler Survey (CKS)
convection zone
giant star
Gliese-Jahreiss Catalog (GJ)
Gliese 436 b (GJ 436 b)
Hayashi track
HD 189733 b
Henyey track
Kapteyn's Star
Lacaille 9352
Lalande 21185
L-type star (L)
LHS 1140
LHS 3844 b
low mass star (LMS)
main sequence star (MS)
M-type star (M)
M dwarf
MEarth Project (MEarth)
post-main-sequence star
proton-proton chain
Proxima b
rare designator prefixes
red-giant branch (RGB)
Ross 154
Ross 248
Scholz's Star
stellar core
stellar structure
Teegarden's Star
TOI 700 d
variable star
Wolf 359