On the Space Time of a Galaxy

Abstract

We present an exact solution of the averaged Einstein's field equations in the presence of two real scalar fields and a component of dust with spherical symmetry. We suggest that the space-time found provides the characteristics required by a galactic model that could explain the supermassive central object and the dark matter halo at once, since one of the fields constitutes a central oscillaton surrounded by the dust and the other scalar field distributes far from the coordinate center and can be interpreted as a halo. We show the behavior of the rotation curves all along the background. Thus, the solution could be a first approximation of a ``long exposition photograph'' of a galaxy.

8 pages REVTeX, 11 eps figures

References in corpus (8)

• A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
• A Relationship Between Nuclear Black Hole Mass and Galaxy Velocity Dispersion
• Cold and Fuzzy Dark Matter
• A Further Analysis of a Cosmological Model of Quintessence and Scalar Dark Matter
• Quintessence and Scalar Dark Matter in the Universe
• A supermassive boson star at the galactic center?
• Relativistic mean field description for the shears band mechanism in ${}^{84}$Rb
• What if Dark matter is Bosonic and self-interacting

Cited by in corpus (44)

• Can dark matter be a Bose-Einstein condensate?
• Evolution of cosmological perturbations in Bose-Einstein condensate dark matter
• Can the galactic rotation curves be explained in brane world models?
• Flat Central Density Profile and Constant DM Surface Density in Galaxies from Scalar Field Dark Matter
• Galactic Collapse of Scalar Field Dark Matter
• Self-gravitating system made of axions
• Numerical studies of Phi^2-Oscillatons
• ${\varphi }^2$ as Dark Matter
• Oscillatons revisited
• Modelling galaxy halos using dark matter with pressure
• Supermassive black holes in scalar field galaxy halos
• The Inflaton Field as Self-Interacting Dark Matter in the Braneworld Scenario
• Galactic metric, dark radiation, dark pressure and gravitational lensing in brane world models
• Gravitational collapse of Bose-Einstein condensate dark matter halos
• Two-fluid dark matter models
• Dark matter as a Weyl geometric effect
• Cosmological evolution of finite temperature Bose-Einstein Condensate dark matter
• Finite temperature effects in Bose-Einstein Condensed dark matter halos
• Can extra dimensional effects replace dark matter ?
• Conformally symmetric vacuum solutions of the gravitational field equations in the brane-world models
• Scalar Field Dark Matter: behavior around black holes
• Scalar field "mini--MACHOs": a new explanation for galactic dark matter
• Mass loss and longevity of gravitationally bound oscillating scalar lumps (oscillatons) in D-dimensions
• Scalar fields properties for flat galactic rotation curves
• Stellar polytropes and Navarro-Frenk-White halo models: comparison with observations
• Cosmological test on viscous bulk models using Hubble Parameter measurements and type Ia Supernovae data
• Could pressureless dark matter have pressure?
• Remarks On The Spherical Scalar Field Halo In Galaxies
• Brane-$f(R)$ gravity and dark matter
• Potential--density pairs for spherical galaxies and bulges: the influence of scalar fields
• Hydrodynamics of galactic dark matter
• On the spin of gravitational bosons
• Potential-density pairs for axisymmetric galaxies: the influence of scalar fields
• The spacetime associated with galactic dark matter halos
• A review on radiation of oscillons and oscillatons
• Is dark matter an extra-dimensional effect?
• Brane worlds and dark matter
• A spherical scalar-tensor galaxy model
• Isotropisation of Bianchi class A models with a minimally coupled scalar field and a perfect fluid
• Multistate scalar field dark matter and its correlation with galactic properties
• An Einstein-like theory of gravity with a non-newtonian weak-field limit
• Scalar field with the source in the form of the stress-energy tensor trace as a dark energy model
• Geodesics around oscillatons made of exponential scalar field potential
• Rotation curves and orbits in the scalar field dark matter halo spacetime