MG11 |
Participant |
Gergely, László Árpád | |
Institution |
University of Szeged - Dóm tér 9 - Szeged - - HUNGARY | |
Session |
Talk |
Abstract |
PPN2 |
The second post-Newtonian order generalized Kepler equation |
The radial component of the motion of compact binary systems composed of neutron stars and/or black holes on eccentric orbit is integrated. We consider all type of perturbations that emerge up to second post-Newtonian order. These perturbations are either of relativistic origin or are related to the spin, mass, quadrupole and magnetic dipole moments of the binary components. We derive a generalized Kepler equation and investigate its domain of validity, in which it properly describes the radial motion. |
S1 |
Black holes on cosmological branes |
While in general relativity black holes can be freely embedded into a cosmological background, the same problem in brane-worlds is much more cumbersome. We present here both a series of no-go results and of explicit constructions of such space-times. We also discuss gravitational collapse in this context. |
AP1 |
Is dark matter futile on the brane? |
We investigate whether dark matter can be replaced by various source terms appearing in the effective Einstein equation, valid on a brane embedded into a higher dimensional space-time (the bulk). Such non-conventional source terms include a quadratic (ordinary) matter source term, a geometric source term originating in the Weyl curvature of the bulk, a source term arising from the possible asymmetric embedding, and finally the pull-back to the brane of possible non-standard model bulk fields. |