7 citations · 13 across the 3 of their papers we have counts for
7 papers · 1 filter
Stellar polytropes and Navarro--Frenk--White dark matter halos: a connection to Tsallis entropy
Luis G. Cabral-Rosetti, Tonatiuh Matos, Darío Núñez +2
We present an alternative for the description of galactic halos based on Tsallis' non--extensive entropy formalism; on this scheme, halos are stellar polytropes characterized by th…
The general relativistic geometry of the Navarro-Frenk-White model
Tonatiuh Matos, Dario Nunez
We derive the space time geometry associated with the Navarro Frenk White dark matter galactic halo model. We discuss several properties of such a spacetime, with particular attent…
Scalar Field Dark Matter and Galaxy Formation
Miguel Alcubierre, F. Siddhartha Guzman, Tonatiuh Matos +3
We present a general description of the scalar field dark matter (SFDM) hypothesis in the cosmological context. The scenario of structure formation under such a hypothesis is based…
Geometric Conditions on the Type of Matter Determining the Flat Behavior of the Rotational Curves in Galaxies
Tonatiuh Matos, Dario Nunez, F. Siddhartha Guzman +1
In an arbitrary axisymmetric stationary spacetime, we determine the expression for the tangential velocity of test objects following a circular stable geodesic motion in the equato…
Quintessence-like Dark Matter in Spiral Galaxies
F. Siddhartha Guzman, Tonatiuh Matos, Dario Nunez +1
Through the geodesic analysis of a static and axially symmetric space time, we present conditions on the state equation of an isotropic perfect fluid , when it is considered…
Quintessence at Galactic Level?
T. Matos, F. S. Guzman
Recently it has been proposed that the main contributor to the dark energy of the Universe is a dynamical, slow evolving, spatially inhomogeneous scalar field called quintessence.…