29 May 2018 to 3 June 2018
Hyatt Regency Indian Wells Conference Center
US/Pacific timezone

Properties of the Binary Neutron Star Merger GW170817

1 Jun 2018, 16:40
30m
North Foyer | Joshua Tree Room (Hyatt Regency Indian Wells Conference Center)

North Foyer | Joshua Tree Room

Hyatt Regency Indian Wells Conference Center

44600 Indian Wells Lane, Indian Wells, CA 92210, USA

Speaker

Dr Benjamin Lackey (Max Planck Institute for Gravitational Physics)

Description

Observations of binary neutron star mergers such as GW170817 by the LIGO and Virgo gravitational-wave detectors provide unique ways of constraining the equation of state through tidal interactions and potential observations of a post-merger signal. In this work we improve initial estimates of the parameters of GW170817 using the known source location, improved waveform modeling, additional data down to 23 Hz compared to the 30 Hz in the initial analysis, and re-calibrated Virgo data. We compare results inferred using several waveform models which incorporate additional physical effects as compared to the initial TaylorF2 waveform reported with the discovery of GW170817. These effects include precession, the spin induced quadrupole moment, and tidal effects calibrated with numerical simulations. We report updated constraints on the masses, spins, and tidal parameters, and compare these results to predictions from various equation of state models. Finally, we perform an unmodeled Bayesian analysis to place upper limits on the amplitude and spectral energy density of the unobserved post-merger signal.
E-mail [email protected]
Collaboration name LIGO Scientific Collaboration and Virgo Collaboration

Primary author

Dr Benjamin Lackey (Max Planck Institute for Gravitational Physics)

Presentation materials