Journal article

Search for gravitational waves from 12 young supernova remnants with a hidden Markov model in Advanced LIGO's second observing run

Margaret Millhouse, Lucy Strang, Andrew Melatos

Physical Review D | American Physical Society | Published : 2020

Abstract

Persistent gravitational waves from rapidly rotating neutron stars, such as those found in some young supernova remnants, may fall in the sensitivity band of the Advanced Laser Interferometer Gravitational-wave Observatory (aLIGO). Searches for these signals are computationally challenging, as the frequency and frequency derivative are unknown and evolve rapidly due to the youth of the source. A hidden Markov model (HMM), combined with a maximum-likelihood matched filter, tracks rapid frequency evolution semicoherently in a computationally efficient manner. We present the results of an HMM search targeting 12 young supernova remnants in data from Advanced LIGO’s second observing run. Six tar..

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Grants

Awarded by Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav)


Funding Acknowledgements

Parts of this research were conducted by the Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav), through Project No. CE170100004. This research has made use of data, software and/or web tools obtained from the Gravitational Wave Open Science Center, a service of LIGO Laboratory, the LIGO Scientific Collaboration and the Virgo Collaboration. LIGO is funded by the U.S. National Science Foundation. Virgo is funded by the French Centre National de Recherche Scientifique (CNRS), the Italian Istituto Nazionale della Fisica Nucleare (INFN) and the Dutch Nikhef, with contributions by Polish and Hungarian institutes. We thank the Continuous Wave Working Group of the LIGO Scientific Collaboration and Virgo Collaboration for their helpful discussion, and in particular Karl Wette and David Keitel for their helpful comments. We also thank Hannah Middleton, Patrick Clearwater, Pat Meyers, and Lilli Sun for informative discussions.