A method for evaluating models that use galaxy rotation curves to derive the density profiles

摘要: There are some approaches, either based on General Relativity (GR) or modified gravity, that use galaxy rotation curves to derive the matter density of corresponding galaxy, and this procedure would indicate a partial complete elimination dark in galaxies. Here we review these clarify difficulties inverted procedure, present method for evaluating them, it test two specific approaches GR: Cooperstock-Tieu (CT) Balasin-Grumiller (BG) approaches. Using new method, find neither tested can satisfactorily fit observational data without matter. The CT approach results be significantly improved if is considered, while BG no usual halo improve its results.