102 citations · 218 across the 4 of their papers we have counts for
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On the Structure of Dark Matter Halos at the Damping Scale of the Power Spectrum with and without Relict Velocities
P. Colin, O. Valenzuela, V. Avila-Reese
We report a series of high-resolution cosmological N-body simulations designed to explore the formation and properties of dark matter halos with masses close to the damping scale o…
Is there Evidence for Flat Cores in the Halos of Dwarf Galaxies?: The Case of NGC 3109 and NGC 6822
Octavio Valenzuela, George Rhee, Anatoly Klypin +4
Two well studied dwarf galaxies -- NGC 3109 and NGC 6822 -- present some of the strongest observational support for a flat core at the center of galactic dark matter (DM) halos. We…
Secular evolution of galactic discs: constraints on phase-space density
V. Avila-Reese, A. Carrillo, O. Valenzuela +1
It was argued in the past that bulges of galaxies cannot be formed through collisionless secular evolution because that would violate constraints on the phase-space density: the ph…
The rotation curves of dwarf galaxies: a problem for Cold Dark Matter?
George Rhee, Octavio Valenzuela, Anatoly Klypin +2
We address the issue of accuracy in recovering density profiles from observations of rotation curves of galaxies. We ``observe'' and analyze our models in much the same way as obse…