Brane-world stars with solid crust and vacuum exterior
Abstract
The minimal geometric deformation approach is employed to show the existence of brane-world stellar distributions with vacuum Schwarzschild exterior, thus without energy leaking from the exterior of the brane-world star into the extra dimension. The interior satisfies all elementary criteria of physical acceptability for a stellar solution, namely, it is regular at the origin, the pressure and density are positive and decrease monotonically with increasing radius, finally all energy conditions are fulfilled. A very thin solid crust with negative radial pressure separates the interior from the exterior, having a thickness inversely proportional to both the brane tension and the radius of the star, i.e. . This brane-world star with Schwarzschild exterior would appear only thermally radiating to a distant observer and be fully compatible with the stringent constraints imposed on stellar parameters by observations of gravitational lensing, orbital evolutions or properties of accretion disks.
Keywords
Cite
@article{arxiv.1405.0252,
title = {Brane-world stars with solid crust and vacuum exterior},
author = {Jorge Ovalle and László Á. Gergely and Roberto Casadio},
journal= {arXiv preprint arXiv:1405.0252},
year = {2015}
}
Comments
20 pages, 6 figures. Improved version. To be published in Classical and Quantum Gravity