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Gravitational Waves from Compact Objects


Owen, Benjamin James (1998) Gravitational Waves from Compact Objects. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/63nf-9z58.


This thesis addresses problems in the generation and detection of gravitational waves from two types of sources: inspiraling compact binaries and rapidly rotating young neutron stars.

Chapters 2 and 3 estimate the computational costs of a basic matched filtering strategy to search for inspiraling compact binaries. Chapter 2 (written in 1995) sets up the machinery for calculating costs and makes a rough estimate based on the waveforms and noise spectra available at the time. It also systematizes previously published methods of choosing the filters. Chapter 3 (written with B. S. Sathyapra­ kash in 1998) fine-tunes the machinery and updates the estimates of Chapter 2 using more current waveforms and noise spectra.

Chapter 4 (written with Hideyuki Tagoshi and Akira Ohashi) concerns the post­ Newtonian generation of gravitational waveforms from inspiraling compact binaries whose component objects spin about their own axes. It lays out a method of cal­ culating post-Newtonian spin effects and calculates the lowest-order such effect not previously known (the second-post-Newtonian spin-orbit contribution to the wave­ forms in the absence of precession).

Chapters 5 and 6 concern the Chandrasekhar-Friedman-Schutz (CFS) gravita­tional radiation instability as it applies to the τ-modes of rapidly rotating young neutron stars. Chapter 5 (written with Lee Lindblom and Sharon M. Morsink) com­ putes the viscous damping and gravitational radiation timescales of the τ-modes and shows that viscosity does not suppress the CFS instability in hot young neutron stars. Chapter 6 (written with Lee Lindblom, Curt Cutler, Bernard F. Schutz, Alberto Vec­chio, and Nils Andersson) computes approximate gravitational waveforms from young neutron stars spinning down due to the τ-mode instability and estimates that these gravitational waves can be detected by the "enhanced" LIGO interferometers if a suitable data analysis strategy is developed.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Thorne, Kip S.
Group:TAPIR, Astronomy Department
Thesis Committee:
  • Unknown, Unknown
Defense Date:12 May 1998
Record Number:CaltechTHESIS:08302017-132619494
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10402
Deposited By: Benjamin Perez
Deposited On:30 Aug 2017 21:04
Last Modified:16 Apr 2021 23:24

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