Gravitational radiation from birefringent matter dynamics

Gravitational radiation from relativistic sources

Calculating Gravitational Radiation from Collisions

The development of both groundand space-based gravitational wave detectors provides new opportunities to observe the radiation from binaries containing neutron stars and black holes. Numerical simulations in 3-D are essential for calculating the coalescence waveforms, and comprise some of the most challenging problems in astrophysics today. This article briefly reviews the current status of eff...

Thermal matter and radiation in a gravitational field.

We study the one-loop contributions of matter and radiation to the gravitational polarization tensor at finite temperatures. Using the analytically continued imaginary-time formalism, the contribution of matter is explicitly given to next-to-leading (T ) order. We obtain an exact form for the contribution of radiation fields, expressed in terms of generalized Riemann zeta functions. A general e...

Gravitational Lensing from Hamiltonian Dynamics

The deflection of light by massive bodies is an old problem having few pedagogical treat­ ments. The full machinery of general relativity seems like a sledge hammer when applied to weak gravitational fields. On the other hand, photons are relativistic particles and their propagation over cosmological distances demands more than Newtonian dynamics. In fact, for weak gravitational fields or for s...

Gravitational waves from an early matter era

We investigate the generation of gravitational waves due to the gravitational instability of primordial density perturbations in an early matter-dominated era which could be detectable by experiments such as LIGO and LISA. We use relativistic perturbation theory to give analytic estimates of the tensor perturbations generated at second order by linear density perturbations. We find that large e...