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Modeling multipolar gravitational-wave emission from small mass-ratio mergers

Enrico Barausse1, Alessandra Buonanno1,2, Scott A. Hughes3, Gaurav Khanna4, Stephen O’Sullivan3, and Yi Pan1

  • 1Maryland Center for Fundamental Physics & Joint Space-Science Institute, Department of Physics, University of Maryland, College Park, Maryland 20742, USA
  • 2Radcliffe Institute for Advanced Study, Harvard University, 8 Garden Street, Cambridge, Massachusetts 02138, USA
  • 3Department of Physics and MIT Kavli Institute, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
  • 4Department of Physics, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, USA

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Phys. Rev. D 85, 024046 – Published 26 January, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.024046

Abstract

Using the effective-one-body (EOB) formalism and a time-domain Teukolsky code, we generate inspiral, merger, and ringdown waveforms in the small-mass-ratio limit. We use EOB inspiral and plunge trajectories to build the Teukolsky-equation source term, and compute full coalescence waveforms for a range of black-hole spins. By comparing EOB waveforms that were recently developed for comparable-mass binary black holes to these Teukolsky waveforms, we improve the EOB model for the (2, 2), (2, 1), (3, 3), and (4, 4) modes. Our results can be used to quickly and accurately extract useful information about merger waves for binaries with spin and should be useful for improving analytic models of such binaries.

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Information

Phys. Rev. D 85, 024046– Published 26 January, 2012
  • Received 13 October 2011
Article part of CHORUS

© 2012 American Physical Society

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