Issue |
EPL
Volume 88, Number 2, October 2009
|
|
---|---|---|
Article Number | 29001 | |
Number of page(s) | 5 | |
Section | Geophysics, Astronomy and Astrophysics | |
DOI | https://doi.org/10.1209/0295-5075/88/29001 | |
Published online | 09 November 2009 |
Brane
gravity
Department of Physics, Shahid Beheshti University - G. C., Evin, Tehran 19839, Iran
Corresponding authors: a.borzou@mail.sbu.ac.ir hr-sepangi@sbu.ac.ir sh.shahidi@mail.sbu.ac.ir raz.yousefi@mail.sbu.ac.ir
Received:
13
July
2009
Accepted:
7
October
2009
We consider a brane world scenario in which the bulk action is assumed to have the form of a generic function of the Ricci scalar and derive the resulting Einstein field equations on the brane. In a constant curvature bulk a conserved geometric quantity appears in the field equations which can be associated with matter. We present cosmological and spherically symmetric solutions by assuming specific forms for
and show that the former can explain an accelerated expanding universe while the latter may account for galaxy rotation curves.
PACS: 98.80.Qc – Quantum cosmology / 04.50.-h – Higher-dimensional gravity and other theories of gravity / 04.50.Kd – Modified theories of gravity
© EPLA, 2009
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