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33 papers · 2 filters
Cosmological models and centre manifold theory
Alan D. Rendall
Centre manifold theory is applied to some dynamical systems arising from spatially homogeneous cosmological models. Detailed information is obtained concerning the late-time behavi…
A New Transition between Discrete and Continuous Self-Similarity in Critical Gravitational Collapse
Christiane Lechner, Jonathan Thornburg, Sascha Husa +1
We analyze a bifurcation phenomenon associated with critical gravitational collapse in a family of self-gravitating SU(2) -models. As the dimensionless coupling constant decreas…
Semiglobal Numerical Calculations of Asymptotically Minkowski Spacetimes
Sascha Husa
This talk reports on recent progress toward the semiglobal study of asymptotically flat spacetimes within numerical relativity. The development of a 3D solver for asymptotically Mi…
Geometry of Generic Isolated Horizons
Abhay Ashtekar, Christopher Beetle, Jerzy Lewandowski
Geometrical structures intrinsic to non-expanding, weakly isolated and isolated horizons are analyzed and compared with structures which arise in other contexts within general rela…
On the observational determination of squeezing in relic gravitational waves and primordial density perturbations
Sukanta Bose, L. P. Grishchuk
We develop a theory in which relic gravitational waves and primordial density perturbations are generated by strong variable gravitational field of the early Universe. The generati…
Calculating the gravitational self force in Schwarzschild spacetime
Leor Barack, Yasushi Mino, Hiroyuki Nakano +2
We present a practical method for calculating the local gravitational self-force (often called ``radiation-reaction force'') for a pointlike particle orbiting a Schwarzschild black…