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Augmented kludge waveforms for detecting extreme-mass-ratio inspirals

Alvin J. K. Chua*

Christopher J. Moore†

Jonathan R. Gair‡

  • Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, United Kingdom

  • Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, United Kingdom

  • School of Mathematics, University of Edinburgh, King’s Buildings, Edinburgh EH9 3JZ, United Kingdom

  • *ajkc3@ast.cam.ac.uk
  • †cjm96@cam.ac.uk
  • ‡j.gair@ed.ac.uk
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Phys. Rev. D 96, 044005 – Published 7 August, 2017

DOI: https://doi.org/10.1103/PhysRevD.96.044005

Abstract

The extreme-mass-ratio inspirals (EMRIs) of stellar-mass compact objects into massive black holes are an important class of source for the future space-based gravitational-wave detector LISA. Detecting signals from EMRIs will require waveform models that are both accurate and computationally efficient. In this paper, we present the latest implementation of an augmented analytic kludge (AAK) model, publicly available at https://github.com/alvincjk/EMRI_Kludge_Suite as part of an EMRI waveform software suite. This version of the AAK model has improved accuracy compared to its predecessors, with two-month waveform overlaps against a more accurate fiducial model exceeding 0.97 for a generic range of sources; it also generates waveforms 5–15 times faster than the fiducial model. The AAK model is well suited for scoping out data analysis issues in the upcoming round of mock LISA data challenges. A simple analytic argument shows that it might even be viable for detecting EMRIs with LISA through a semicoherent template bank method, while the use of the original analytic kludge in the same approach will result in around 90% fewer detections.

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Phys. Rev. D 96, 044005– Published 7 August, 2017
  • Received 11 May 2017

© 2017 American Physical Society

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