Optimizing LIGO with LISA forewarnings to improve black-hole spectroscopy

Rhondale Tso, Davide Gerosa, and Yanbei Chen
Phys. Rev. D 99, 124043 – Published 25 June 2019

Abstract

The early inspiral of massive stellar-mass black-hole binaries merging in LIGO’s sensitivity band will be detectable at low frequencies by the upcoming space mission LISA. LISA will predict, with years of forewarning, the time and frequency with which binaries will be observed by LIGO. We will, therefore, find ourselves in the position of knowing that a binary is about to merge, with the unprecedented opportunity to optimize ground-based operations to increase their scientific payoff. We apply this idea to detections of multiple ringdown modes, or black-hole spectroscopy. Narrow-band tunings can boost the detectors’ sensitivity at frequencies corresponding to the first subdominant ringdown mode and largely improve our prospects to experimentally test the Kerr nature of astrophysical black holes. We define a new consistency parameter between the different modes, called δGR, and show that, in terms of this measure, optimized configurations have the potential to double the effectiveness of black-hole spectroscopy when compared to standard broadband setups.

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  • Received 29 June 2018

DOI:https://doi.org/10.1103/PhysRevD.99.124043

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Rhondale Tso1,*, Davide Gerosa1,2,†, and Yanbei Chen1,‡

  • 1TAPIR 350-17, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA
  • 2School of Physics and Astronomy and Institute for Gravitational Wave Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom

  • *rtso@caltech.edu
  • dgerosa@caltech.edu
  • yanbei@caltech.edu

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Issue

Vol. 99, Iss. 12 — 15 June 2019

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