- #1
alialice
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Is there someone how could explain me why is color temperature (Tcol) always greater than the effective temperature (Teff) of a star?
I know that Teff is the temperature of the last interaction surface, where photons are emitted.
In the case that the scattering opacity is the dominant one, photons have a Tcol higher than Teff. What we can observe with instruments is Tcol. But the temperature that gives luminosity is Teff. Why don't use Tcol? Please explain me the exact difference between the two.
Thanks
I know that Teff is the temperature of the last interaction surface, where photons are emitted.
In the case that the scattering opacity is the dominant one, photons have a Tcol higher than Teff. What we can observe with instruments is Tcol. But the temperature that gives luminosity is Teff. Why don't use Tcol? Please explain me the exact difference between the two.
Thanks