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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.


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:02 Dec 2020 02:39

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