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Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2018

Empirical velocity profiles for galactic rotation curves

Résumé

A unified parametrization of the circular velocity, which accurately fits 850 galaxy rotation curves without needing in advance the knowledge of the luminous matter components, nor a fixed dark matter halo model, is proposed. A notable feature is that the associated gravitational potential increases with the distance from the galaxy centre, giving rise to a length-scale indicating a finite size of a galaxy, and after, the Keplerian fall-off of the parametrized circular velocity is recovered according to Newtonian gravity, making possible the estimation of the total mass enclosed by the galaxy.
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Dates et versions

hal-01768115 , version 1 (18-12-2023)

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E. Lopez Fune. Empirical velocity profiles for galactic rotation curves. Monthly Notices of the Royal Astronomical Society, 2018, 475 (2), pp.2132-2163. ⟨10.1093/mnras/stx3245⟩. ⟨hal-01768115⟩
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