de Vaucouleurs's law
= de Vaucouleurs's law
= De Vaucouleurs law
{synonym}
The $n=4$ case of the Sérsic surface-brightness profile, approximately useful for many bright <elliptical galaxies>: $I(R)=I_e\exp[-7.67((R/R_e)^{1/4}-1)]$. Real <galaxies> can have other Sérsic indices.