Hidden Markov model tracking of continuous gravitational waves from young supernova remnants

Sun, L, Melatos, A, Suvorova, S, Moran, B and Evans, R 2018, 'Hidden Markov model tracking of continuous gravitational waves from young supernova remnants', Physical Review D: covering particles, fields, gravitation, and cosmology, vol. 97, no. 4, pp. 1-21.


Document type: Journal Article
Collection: Journal Articles

Title Hidden Markov model tracking of continuous gravitational waves from young supernova remnants
Author(s) Sun, L
Melatos, A
Suvorova, S
Moran, B
Evans, R
Year 2018
Journal name Physical Review D: covering particles, fields, gravitation, and cosmology
Volume number 97
Issue number 4
Start page 1
End page 21
Total pages 21
Publisher American Physical Society
Abstract Searches for persistent gravitational radiation from nonpulsating neutron stars in young supernova remnants are computationally challenging because of rapid stellar braking. We describe a practical, efficient, semicoherent search based on a hidden Markov model tracking scheme, solved by the Viterbi algorithm, combined with a maximum likelihood matched filter, the F statistic. The scheme is well suited to analyzing data from advanced detectors like the Advanced Laser Interferometer Gravitational Wave Observatory (Advanced LIGO). It can track rapid phase evolution from secular stellar braking and stochastic timing noise torques simultaneously without searching second- and higher-order derivatives of the signal frequency, providing an economical alternative to stack-slide-based semicoherent algorithms. One implementation tracks the signal frequency alone. A second implementation tracks the signal frequency and its first time derivative. It improves the sensitivity by a factor of a few upon the first implementation, but the cost increases by 2 to 3 orders of magnitude.
Subject Stochastic Analysis and Modelling
Signal Processing
DOI - identifier 10.1103/PhysRevD.97.043013
Copyright notice © 2018 American Physical Society
ISSN 2470-0010
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