EFFECT OF DARK MATTER HALO SUBSTRUCTURES ON GALAXY ROTATION CURVES
- NRAO, P.O. Box O, 1003 Lopezville Road, Socorro, NM 87801 (United States)
In this paper, the effect of halo substructures on galaxy rotation curves is investigated using a simple model of dark matter clustering. A dark matter halo density profile is developed based only on the scale-free nature of clustering that leads to a statistically self-similar distribution of the substructures at the galactic scale. A semi-analytical method is used to derive rotation curves for such a clumpy dark matter density profile. It is found that the halo substructures significantly affect the galaxy velocity field. Based on the fractal geometry of the halo, this self-consistent model predicts a Navarro-Frenk-White-like rotation curve and a scale-free power spectrum of the rotation velocity fluctuations.
- OSTI ID:
- 21467161
- Journal Information:
- Astrophysical Journal, Vol. 723, Issue 1; Other Information: DOI: 10.1088/0004-637X/723/1/781; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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