Effective Temperature And Spectral Types - shelyak Lhires Lite Guide D'utilisateur

Coded light is rich of lof of information:
on effective temperature at the surface (Wien law)
●
on radial, rotation and expansion movement (Doppler effect)
●
on stellar density and pressure
●
on chemical composition
●

1.13.4 Effective temperature and spectral types

Stars are almost like black bodies. They emit energy at all
wavelengths with a continuous spectra. Its shape is a Planck curve whose
maximum is directly linked to the effective temperature of the surface
(stellar atmosphere); this is the Wien law.
Our Sun has an effective surface temperature around 6000K; visible
stars to us have temperature between 3000K and 30000K.
Stars are classified based on their temperature with historical
letters O, B, A, F, G, K, M. Stars with O type are the hottest while M type
are the coolest. We memorize this sequence with the famous "Oh Be A
Fine Girl (Guy), Kiss Me". Types R, S, and N have been added later one
("Right Now Sweetheart"!).
Continuous spectra of several black bodies
Lhires Lite – User Manual DC0005C 46 / 60