Loi de Vaucouleurs

En astrophysique, la loi de Vaucouleurs décrit le profil de la brillance de surface d'une galaxie elliptique en fonction de la distance à son centre. Cette loi phénoménologique a été formulée pour la première fois en 1948 par l'astrophysicien franco-américain Gérard de Vaucouleurs. Elle est souvent appelée la loi .

En définissant le rayon effectif , on peut écrire la relation :

est la brillance de surface à .


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