Papapetrou energy-momentum tensor for Chern-Simons modified gravity

ar X iv : g r - qc / 0 70 20 29 v 1 5 Fe b 20 07 Papapetrou Energy - Momentum Tensor for Chern - Simons Modified Gravity

We construct a conserved, symmetric energy-momentum (pseudo-)tensor for Chern-Simons modified gravity, thus demonstrating that the theory is Lorentz invariant. The tensor is discussed in relation to other gravitational energy-momentum tensors and analyzed for the Schwarzschild, Reissner-Nordstrom, and FRW solutions. To our knowledge this is the first confirmation that the Reissner-Nordstrom and...

Dirichlet boundary-value problem for Chern-Simons modified gravity

Daniel Grumiller,* Robert Mann, and Robert McNees Center for Theoretical Physics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA Department of Physics & Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada Perimeter Institute, 31 Caroline Street North, Waterloo, Ontario N2L 2Y5, Canada (Received 13 March 2008; published 8 Octo...

Flat rotation curves in Chern-Simons modified gravity

How do black holes spin in Chern-Simons modified gravity?

No Kerr-like exact solution has yet been found in Chern-Simons modified gravity. Intrigued by this absence, we study stationary and axisymmetric metrics that could represent the exterior field of spinning black holes. For the standard choice of the background scalar, the modified field equations decouple into the Einstein equations and additional constraints. These constraints eliminate essenti...

A Covariant Formalism for Chern–simons Gravity

Chern–Simons type Lagrangians in d = 3 dimensions are analyzed from the point of view of their covariance and globality. We use the transgression formula to find out a new fully covariant and global Lagrangian for Chern–Simons gravity: the price for establishing globality is hidden in a bimetric (or biconnection) structure. Such a formulation allows to calculate from a global and simpler viewpo...