Astrophysics (Index)About

effective temperature

(Teff, Teff, black body temperature, TBB)
(temperature of an equivalent black body in terms of total radiation)

The effective temperature (Teff, Teff, or black body temperature, TBB) of a body such as a star or planet is the calculated temperature of a black body that would produce the same total radiation as the star produces, i.e., the result of that kind of temperature determination. It can be considered an estimate of the body's surface temperature, imperfect for being determined at a distance and because a star's surface itself is ambiguous: the radiation reaches us from more than one depth into the star, and these layers have differing temperatures. The various temperature determination methods in use differ but do have some general agreement. Among other measures are the brightness temperature (based on a single wavelength or narrow passband) and the color temperature (based on a color index).

Further reading:

Referenced by pages:
brown dwarf (BD)
color index
51 Eridani b
Hess diagram
H-R diagram (HRD)
stellar luminosity determination
stellar parameter determination
surface temperature
zero-age main sequence (ZAMS)