Parameterized Post-Einsteinian Framework for Precessing Binaries
Nicholas Loutrel, Paolo Pani, Nicol\'as Yunes

TL;DR
This paper extends the parameterized post-Einsteinian framework to include precession effects in gravitational waveforms, enabling more comprehensive tests of general relativity with precessing binary systems.
Contribution
It introduces a new ppE framework with additional parameters to model precession effects in gravitational wave signals from binary systems.
Findings
Framework includes 2n ppE parameters for phase and amplitude.
Explicit mapping of ppE parameters to specific waveform models.
Enables improved tests of gravity with precessing binary gravitational waves.
Abstract
In general relativity, isolated black holes obey the no hair theorems, which fix the multipolar structure of their exterior spacetime. However, in modified gravity, or when the compact objects are not black holes, the exterior spacetime may have a different multipolar structure. When two black holes are in a binary, this multipolar structure determines the morphology of the dynamics of orbital and spin precession. In turn, the precession dynamics imprint onto the gravitational waves emitted by an inspiraling compact binary through specific amplitude and phase modulations. The detection and characterization of these amplitude and phase modulations can therefore lead to improved constraints on fundamental physics with gravitational waves. Recently, analytic precessing waveforms were calculated in two scenarios: (i) dynamical Chern-Simons gravity, where the no-hair theorems are violated,…
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Taxonomy
TopicsPulsars and Gravitational Waves Research · Astrophysical Phenomena and Observations · Cosmology and Gravitation Theories
