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Dark matter equation of state from rotational curves of galaxies

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arxiv 1301.6785 v2 pith:PGH2FDAA submitted 2013-01-28 astro-ph.CO gr-qc

Dark matter equation of state from rotational curves of galaxies

classification astro-ph.CO gr-qc
keywords statedarkequationmattergalaxiesrotationalcurvesdifferent
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In this work we model galactic halos describing the dark matter as a non zero pressure fluid and derive, not impose, a dark matter equation of state by using observational data of the rotation curves of galaxies. In order to reach hydrostatic equilibrium, as expected for the halo, it is mandatory that dark fluid's pressure should not be zero. The equation of state is obtained by solving the matter-geometry system of equations assuming different dark matter density or rotational velocity profiles. The resulting equations of state are, in general, different to a barotropic equation of state. The free parameters of the equation of state are fixed by fitting the observed rotational velocities of a set of galaxies.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Modeling dark matter halos with self-interacting fermions: A polytropic approach

    hep-ph 2025-12 reject novelty 4.0

    A single ~40 eV self-interacting fermion is claimed to fit rotation curves of many galaxies with one adjustable density per galaxy, but fit quality and reported parameter ranges are inconsistent.