2014/11/07 by Fatemeh Ahmadi, Jafar Khodagholizadeh, H. R. Sepangi
Physics and Astronomy · #gr-qc
paper · pdf · doi:10.1007/s10509-012-1183-6
published as Astrophys.Space Sci. 342 (2012) 487-492 · 12 pages. arXiv admin note: substantial text overlap with arXiv:gr-qc/0702103; and text overlap with arXiv:arXiv:gr-qc/0305041 by other author
arxiv created 2014/11/07 · arxiv updated 2015/06/23
In this paper we study the speed of gravitational waves in a brane world scenario and show that if the extra dimension is space-like, the speed of the propagation of such waves is greater in the bulk than that on the brane. Therefore, the 4D Lorentz invariance is broken in the gravitational sector. A comparison is also made between the red shift of such waves and those of the electromagnetic waves on the brane. Such a comparison is essential for extracting the signature of the extra dimension and thus clarifying the question of maximal velocity of gravitational waves in the bulk.