Rotating stellar core-collapse waveform decomposition: a principal component analysis approach

Heng, I.S. (2009) Rotating stellar core-collapse waveform decomposition: a principal component analysis approach. Classical and Quantum Gravity, 26(10), (doi:10.1088/0264-9381/26/10/105005)

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Publisher's URL: http://dx.doi.org/10.1088/0264-9381/26/10/105005

Abstract

This paper introduces the use of principal component analysis (PCA) as a method to decompose the catalogues of gravitational waveforms to produce a set of orthonormal basis vectors. We apply PCA to a set of gravitational waveforms produced by rotating stellar core-collapse simulations and compare its basis vectors with those obtained through Gram–Schmidt decomposition. The comparison is made using the match parameter which quantifies how well each waveform is reconstructed by a set of basis vectors. The performance of the two methods is found to be comparable with 14 Gram–Schmidt basis vectors and 12 principal components required if we require all waveforms in the catalogue to be reconstructed with a match of 0.9 or better. Additionally, we observe that the chosen set of waveforms has very similar features, and a match of at least 0.7 can be obtained by decomposing only waveforms generated from simulations with A = 2. We discuss the implications of this observation and the advantages of eigen-decomposing waveform catalogues with PCA.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Heng, Professor Ik Siong
Authors: Heng, I.S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Classical and Quantum Gravity
ISSN:0264-9381

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
459312Investigations in Gravitational Radiation.Sheila RowanScience & Technologies Facilities Council (STFC)ST/I001085/1Physics and Astronomy