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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Stars in the braneworld
Physical Review D - Particles, Fields, Gravitation and Cosmology, Volume 64, No. 12, Year 2001
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Description
We show that, in a Randall-Sundrum II type braneworld, the vacuum exterior of a spherical star is not in general a Schwarzschild spacetime, but has radiative-type stresses induced by five-dimensional graviton effects. Standard matching conditions do not lead to a unique exterior on the brane because of these five-dimensional graviton effects. We find an exact uniform-density stellar solution on the brane, and show that the general relativity upper bound (Formula presented) is reduced by five-dimensional high-energy effects. The existence of neutron stars leads to a constraint on the brane tension that is stronger than the big bang nucleosynthesis constraint, but weaker than the Newton-law experimental constraint. We present two different non-Schwarzschild exteriors that match the uniform-density star on the brane, and we give a uniqueness conjecture for the full five-dimensional problem. © 2001 The American Physical Society.
Authors & Co-Authors
Germani, Cristiano
United Kingdom, Portsmouth
University of Portsmouth
Maartens, Roy
United Kingdom, Portsmouth
University of Portsmouth
Statistics
Citations: 242
Authors: 2
Affiliations: 1
Identifiers
Doi:
10.1103/PhysRevD.64.124010
ISSN:
15507998
Study Design
Case-Control Study