Precessing supermassive black hole binaries and dark energy measurements with LISA
Résumé
Spin induced precessional modulations of gravitational wave signals from supermassive black hole binaries can improve the estimation of luminosity distance to the source by space based gravitational wave missions like the Laser Interferometer Space Antenna (LISA). We study how this impacts the ability of LISA to do cosmology, specifically, to measure the dark energy equation of state (EOS) parameter w. Using the ΛCDM model of cosmology, we show that observations of precessing binaries with mass ratio 10∶1 by LISA, combined with a redshift measurement, can improve the determination of w up to an order of magnitude with respect to the nonprecessing case depending on the total mass and the redshift.
Mots clés
04.30.Db
04.25.Nx
04.80.Nn
95.55.Ym
Wave generation and sources
Post-Newtonian approximation
perturbation theory
related approximations
Gravitational wave detectors and experiments
Gravitational radiation detectors
mass spectrometers
and other instrumentation and techniques
General Relativity and Quantum Cosmology
Astrophysics - Cosmology and Extragalactic Astrophysics
Domaines
Planète et Univers [physics]
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