English

Brane-world stars with solid crust and vacuum exterior

General Relativity and Quantum Cosmology 2015-02-02 v2 Solar and Stellar Astrophysics High Energy Physics - Theory

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 Δ\Delta inversely proportional to both the brane tension σ\sigma and the radius RR of the star, i.e. Δ1Rσ\Delta ^{-1}\sim R\,\sigma . 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

R2 v1 2026-06-22T04:04:15.003Z