Dwarf star

The term dwarf star refers to a variety of distinct classes of stars.

Dwarf star alone generally refers to any main-sequence star, a star of luminosity class V.
- Red dwarfs are low-mass main-sequence stars.
- Yellow dwarfs are main-sequence (dwarf) stars with masses comparable to that of the Sun. The Sun is a yellow dwarf.
A blue dwarf is a low-mass star which is hypothesized to be the post-main-sequence form of a red dwarf.
A white dwarf is a star composed of electron-degenerate matter, thought to be the final stage in the evolution of stars not massive enough to undergo a Type II supernova—stars less massive than roughly 9 solar masses.
- A black dwarf refers to a white dwarf that has cooled sufficiently such that it no longer emits any visible light.
A brown dwarf is a sub-stellar object not massive enough to ever fuse hydrogen into helium, but still massive enough to fuse deuterium—less than about 0.08 solar masses and more than about 13 Jupiter masses.

Star

Evolution	Formation Pre–main sequence Main sequence Horizontal branch Asymptotic giant branch Dredge-up Instability strip Red clump PG1159 star Mira variable Planetary nebula Protoplanetary nebula Luminous red nova Luminous blue variable Wolf–Rayet star Supernova impostor Supernova Hypernova Hertzsprung–Russell diagram Color–color diagram

Protostars	Molecular cloud H II region Bok globule Young stellar object Herbig–Haro object Hayashi track Hayashi limit Henyey track Orion T Tauri FU Orionis Herbig Ae/Be

Luminosity class	Subdwarf Dwarf Blue Red Subgiant Giant Blue Red Bright giant Supergiant Blue Red Yellow Hypergiant Yellow Blue straggler

Spectral classification	O B A F G K M Be OB Subdwarf B Late-type Peculiar Am Ap/Bp Oscillating Barium Carbon CH Extreme helium Lambda Boötis Lead Mercury-manganese S Shell Technetium

Remnants	White dwarf Black dwarf Helium planet Neutron star Pulsar Magnetar Stellar black hole Compact star Quark Exotic Stellar core: EF Eridani B

Failed and theoretical stars	Substellar object Brown dwarf Sub-brown dwarf Planetar Boson star Dark-matter star Quasistar Thorne–Żytkow object Iron star

Nucleosynthesis	Alpha process Triple-alpha process Proton–proton chain Helium flash CNO cycle Lithium burning Carbon burning Neon burning Oxygen burning Silicon burning S-process R-process Fusor Nova Remnants

Structure	Core Convection zone Microturbulence Oscillations Radiation zone Photosphere Starspot Chromosphere Corona Stellar wind Bubble Asteroseismology Eddington luminosity Kelvin–Helmholtz mechanism

Properties	Designation Dynamics Effective temperature Kinematics Magnetic field Magnitude Absolute Mass Metallicity Rotation UBV color Variability

Star systems	Binary Contact Common envelope Multiple Accretion disc Planetary system Earth's Solar System

Earth-centric observation of	Pole star Circumpolar star Magnitude Apparent Photographic Color Radial velocity Proper motion Parallax Photometric-standard star

Lists	Star names Arabic names Chinese names Most massive Least massive Largest Brightest Historical Most luminous Nearest Nearest bright Stars with exoplanets Brown dwarfs Planetary nebulae Novae Notable supernovae Supernova remnants Supernova candidates Timeline of stellar astronomy

Related articles	Planet Star cluster Association Open cluster Globular cluster Galaxy Supercluster Helioseismology Guest star Constellation Asterism Gravity Intergalactic star Infrared dark cloud

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Dwarf star

See also