Astrophysics (Index)About

M dwarf

(small, cool main-sequence star in stellar class M)

An M dwarf is a small M-type star. The term red dwarf definitely includes M dwarfs, but sometime that term is also meant to include some or all K-type stars (K dwarfs). Early M dwarfs (at the hotter ones) are now considered likely places to observe extra-solar planets within a habitable zone. An estimate is about a quarter would have such a planet, but another reason is that M dwarfs are very common, comprising about three quarters of all main sequence stars. But given their evolution, such planets are more likely to have experienced a longer period of stellar activity giving it time to remove the planet's atmosphere, thus less likely to be habitable. M dwarf examples include AD Leonis, Barnard's Star, Lacaille 9352, Lalande 21185, Ross 154, Ross 248, Scholz's Star, and Wolf 359.


(star type)
Further reading:
http://en.wikipedia.org/wiki/Red_dwarf

Referenced by pages:
Bcool
brown dwarf (BD)
FGK star
G239-25
K2
Kepler-16b
Kepler-186f
M-type star (M)
MUSCLES
OGLE-2005-BLG-3290Lb
PALMS
red dwarf
radial velocity method
SPECULOOS
SPIRou
stellar demographics
Transiting Exoplanet Survey Satellite (TESS)
variable star
WFCAM Transit Survey (WTS)
X-ray source

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