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Kormendy Relation

(relation between elliptical galaxy luminosity surface brightness)

The Kormendy relation (FJR) is a relation between the effective radius of an elliptical galaxy and the surface brightness at that radius. It is an inverse relation: the larger the galaxy, the more diffuse, i.e., more of the galaxy is faint.


(relation,galaxies,luminosity)
Further reading:
https://astronomy.swin.edu.au/cosmos/K/Kormendy+Relation
https://chandra.as.utexas.edu/Be-logre.html

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