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Title: Waveform uncertainty quantification and interpretation for gravitational-wave astronomy

We demonstrate how to quantify the frequency-domain amplitude and phase accuracy of waveform models,δAandδφ, in a form that could be marginalized over in gravitational-wave inference using techniques currently applied for quantifying calibration uncertainty. For concreteness, waveform uncertainties affecting neutron-star inspiral measurements are considered, and post-hoc error estimates from a variety of waveform models are made by comparing time-domain and frequency-domain analytic models with multiple-resolution numerical simulations. These waveform uncertainty estimates can be compared to GW170817 calibration envelopes or to Advanced LIGO and Virgo calibration goals. Signal-specific calibration and waveform uncertainties are compared to statistical fluctuations in gravitational-wave observatories, giving frequency-dependent modeling requirements for detectors such as Advanced LIGO Plus, Cosmic Explorer, or Einstein Telescope. Finally, the distribution of waveform error for the GW170817 posterior is computed from tidal models and compared to the constraints onδφorδAfrom GWTC-1 by Edelmanet al.In general,δφandδAcan also be interpreted in terms of unmodeled astrophysical energy transfer within or from the source system.

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Author(s) / Creator(s):
Publisher / Repository:
IOP Publishing
Date Published:
Journal Name:
Classical and Quantum Gravity
Page Range / eLocation ID:
Article No. 135002
Medium: X
Sponsoring Org:
National Science Foundation
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