Rotating stellar core-collapse waveform decompositon: a Principal Component Analysis approach

Abstract

This paper introduces the use of Principal Component Analysis as a method to decompose the waveform catalogues to produce a set of orthonormal basis vectors. We apply this method to a set of supernova waveforms and compare the basis vectors obtained with those obtained through Gram-Schmidt decomposition. We observe that, for the chosen set of waveforms, the performance of the two methods are comparable for minimal match requirements up to 0.9, with 14 Gram-Schmidt basis vectors and 12 principal components required for a minimal match of 0.9. This implies that there are many common features in the chosen waveforms. Additionally, we observe the chosen waveforms have very similar features and a minimal match of 0.7 can be obtained by decomposing only one third of the entire set of waveforms in the chosen catalogue. We discuss the implications of this observation and the advantages of eigen-decomposing waveform catalogues with Principal Component Analysis.

11 pages, 3 figures, to be submitted to CQG (Now includes most of referee's comments)

References in corpus (4)

• The gravitational wave burst signal from core collapse of rotating stars
• Search for gravitational waves from binary inspirals in S3 and S4 LIGO data
• Generic Gravitational Wave Signals from the Collapse of Rotating Stellar Cores
• A New Mechanism for Gravitational Wave Emission in Core-Collapse Supernovae