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- Freeman_law abstract "The Freeman law is a statement in astronomy which says that disk galaxies have the same surface brightness, Σ at the center. It was described in 1970 by Ken Freeman.The Freeman law was confirmed in year 2010 for a sample of 30000 Sloan Digital Sky Survey galaxy images and it can be used with the Tully-Fisher relation to determine the luminosity and therefore distance of an observed galaxy.However more recently it has been argued that the Freeman law is an effect of selection bias.".
- Freeman_law wikiPageID "15163555".
- Freeman_law wikiPageRevisionID "593050159".
- Freeman_law subject Category:Extragalactic_astronomy.
- Freeman_law subject Category:Observational_astronomy.
- Freeman_law comment "The Freeman law is a statement in astronomy which says that disk galaxies have the same surface brightness, Σ at the center. It was described in 1970 by Ken Freeman.The Freeman law was confirmed in year 2010 for a sample of 30000 Sloan Digital Sky Survey galaxy images and it can be used with the Tully-Fisher relation to determine the luminosity and therefore distance of an observed galaxy.However more recently it has been argued that the Freeman law is an effect of selection bias.".
- Freeman_law label "Freeman law".
- Freeman_law sameAs m.03hkfcd.
- Freeman_law sameAs Q5501020.
- Freeman_law sameAs Q5501020.
- Freeman_law wasDerivedFrom Freeman_law?oldid=593050159.
- Freeman_law isPrimaryTopicOf Freeman_law.