Type of Document Dissertation Author Megevand, Miguel URN etd-11032009-142431 Title Matter Sources Interacting with a Black Hole: Dynamics and Observable Signatures Degree Doctor of Philosophy (Ph.D.) Department Physics & Astronomy Advisory Committee
Advisor Name Title Pullin, Jorge Committee Chair Frank, Juhan Committee Member Gonzalez, Gabriela Committee Member Hynes, Robert Committee Member Lehner, Luis R Committee Member Sage, Daniel S Dean's Representative Keywords
- black hole
- scalar field
- gravitational waves
- accretion disk
Date of Defense 2009-10-26 Availability unrestricted AbstractDynamical systems involving black holes are one of the most promising sources of detectable
gravitational waves. Additionally, one expects strong electromagnetic signals whenever matter
sources are present. In this dissertation, we study different astrophysical scenarios pertaining
the interaction of matter with a black hole.
We first investigate the possibility to localize scalar field configurations surrounding a (dynamic)
black hole. The analytical study is illustrated by performing numerical simulations that
show the evolution of a Klein-Gordon-like scalar field shell surrounding a black hole. Second, we
present a method to estimate the gravitational wave frequency at the end of the inspiral phase
of a compact binary. This method is applied to study the possibility of a neutron starís tidal
disruption occurring before plunging into the companion black hole, and to provide a way of improving gravitational wave data analysis when using match filtering techniques. Last, we study
the effects of a black hole merger on a circumbinary disk. We consider separately the effects of central mass reduction (due to the energy loss through gravitational waves) and black hole recoil (due to asymmetric emission of gravitational radiation), presenting possibly detectable electromagnetic signatures.
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