title: Accelerated gravitational wave parameter estimation with reduced order modeling.
abstract: Inferring the astrophysical parameters of coalescing compact binaries is a key science goal of the upcoming advanced LIGO-Virgo gravitational-wave detector network and, more generally, gravitational-wave astronomy. However, current approaches to parameter estimation for these detectors require computationally expensive algorithms. Therefore, there is a pressing need for new, fast, and accurate Bayesian inference techniques. In this Letter, we demonstrate that a reduced order modeling approach enables rapid parameter estimation to be performed. By implementing a reduced order quadrature scheme within the LIGO Algorithm Library, we show that Bayesian inference on the 9-dimensional parameter space of nonspinning binary neutron star inspirals can be sped up by a factor of ∼30 for the early advanced detectors' configurations (with sensitivities down to around 40 Hz) and ∼70 for sensitivities down to around 20 Hz. This speedup will increase to about 150 as the detectors improve their low-frequency limit to 10 Hz, reducing to hours analyses which could otherwise take months to complete. Although these results focus on interferometric gravitational wave detectors, the techniques are broadly applicable to any experiment where fast Bayesian analysis is desirable.
authors.affiliation: Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, United Kingdom.|Department of Applied Mathematics and Theoretical Physics, Wilberforce Road, Cambridge CB3 0WA, United Kingdom.
authors.forename: Priscilla
authors.initials: P
authors.lastname: Canizares
authors.affiliation: Department of Physics, Joint Space Sciences Institute, Maryland Center for Fundamental Physics, University of Maryland, College Park, Maryland 20742, USA.|Center for Radiophysics and Space Research, Cornell University, Ithaca, New York 14853, USA.
authors.forename: Scott E
authors.initials: SE
authors.lastname: Field
authors.affiliation: Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, United Kingdom.
authors.forename: Jonathan
authors.initials: J
authors.lastname: Gair
authors.affiliation: LIGO, California Institute of Technology, Pasadena, California 91125, USA.
authors.forename: Vivien
authors.initials: V
authors.lastname: Raymond
authors.affiliation: LIGO, California Institute of Technology, Pasadena, California 91125, USA.
authors.forename: Rory
authors.initials: R
authors.lastname: Smith
authors.affiliation: Center for Astrophysics and Space Sciences, Center for Computational Mathematics, San Diego Supercomputer Center, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0424, USA.
authors.forename: Manuel
authors.initials: M
authors.lastname: Tiglio