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Showing 1 to 6 of 6 for “"gravitational energy"”.
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Using perturbation theory to understand the two body problem in general relativity
… objects (neutron stars and black holes) radiate gravitational waves (GWs). The prospect of detecting these GWs using ground and space based experiments has made it imperative to understand the dynamics of such compact binaries. This work describes several advances in our ability to model compact …
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Gravitational Waves From Perturbed Kerr Black Holes: Two Investigations
… post-Newtonian approximation. We focus on the gravitational energy produced by the quasicircular, equatorial, extreme mass-ratio inspiral of a compact object into a Kerr black hole of mass M and spin J. For a given dimensionless spin a ≡ J/M2 (in geometrical units G = c = 1 ), the energy flux …
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Topics in Theoretical Gravity
… issues. Chapter 2 is about the quasilocal energy, which is a mathematical tool for defining gravitational energy. We extend previous definitions so that they are valid within the event horizon of a black hole. We find that the energy at the center is finite rather than divergent, indicating …
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Gauge theories of gravity
… is presented, based on the gauge principle. The gravitational Lagrangian has no Einstein--Hilbert term, but is constructed from quadratic invariants of the Riemann--Cartan curvature and torsion, constituting a geometric gauge theory of the Poincaré group. Despite the introduction of Planck and …
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Black Hole Accretion Systems
… is the most efficient known process to convert gravitational energy into radiation. Some gamma-ray bursts (GRBs), some X-ray binaries, and all active galactic nuclei (AGN) are likely powered by accretion onto a rotating black hole. I model the global, timedependent accretion flow around a black …
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Solid-liquid interactions in microscale structures and devices
… approach, the minimization of the total free energy is employed to investigate the interactions between a fluid droplet and a flexible thin film. A 2D energy functional is proposed, comprising the surface energy of the fluid, bending energy of the thin film and gravitational energy of the …