Freeman Law
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Freeman Law is a statement in astronomy which says that disk galaxies have a constant surface brightness, Σ. It was noticed in 1970 by Ken Freeman.[1]
Freeman law can be used with the Tully-Fisher relation to determine the luminosity and therefore distance of an observed galaxy.
However more recently it has become widely accepted that Freeman Law is an effect of selection bias.[1][2]
[edit] References
- ^ a b McGaugh et al, "Galaxy Selection and Surface Brightness Distribution" (1995) Astron.J., 110 (1995) 573,
- ^ Minnesota State University, "[1]"
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