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Author Saotome, Ryo ♦ Garfinkle, David ♦ Vikman, Alexander ♦ Akhoury, Ratindranath
Source CERN Document Server
Content type Text
File Format PDF
Date Created 2011-03-15
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Modern physics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Particle Physics - Theory ♦ Astrophysics and Astronomy
Abstract Numerical simulations of the accretion of test scalar fields with non-standard kinetic terms (of the k-essence type) onto a Schwarzschild black hole are performed. We find a full dynamical solution for the spherical accretion of a Dirac-Born-Infeld type scalar field. The simulations show that the accretion eventually settles down to a well known stationary solution. This particular analytical steady state solution maintains two separate horizons. The standard horizon is for the usual particles propagating with the limiting speed of light, while the other sonic horizon is for the k-essence perturbations propagating with the speed of sound around this accreting background. For the case where the k-essence perturbations propagate superluminally, we show that one can send signals from within a black hole during the approach to the stationary solution. We also find that a ghost condensate model settles down to a stationary solution during the accretion process.
Description Presented at: Phys. Rev. D 83 (2011) 084034
Learning Resource Type Article
Publisher Date 2011-01-01
Rights License Preprint: © 2011-2018 CERN (License: CC-BY-3.0)
Page Count 8