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- W4311539250 abstract "Quasicircular binary black hole mergers are described by 15 parameters, of which gravitational wave observations can typically constrain only $ensuremath{sim}10$ independent combinations to varying degree. In this work, we devise coordinates that remove correlations, and disentangle well- and poorly-measured quantities. Additionally, we identify approximate discrete symmetries in the posterior as the primary cause of multimodality, and design a method to tackle this type of multimodality. The resulting posteriors have little structure and can be sampled efficiently and robustly. We provide a python package for parameter estimation, cogwheel, that implements these methods together with other algorithms for accelerating the inference process. One of the coordinates we introduce is a spin azimuth that is measured remarkably well in several events. We suggest this might be a sensitive indicator of orbital precession, and we anticipate that it will shed light on the occurrence of spin-orbit misalignment in nature." @default.
- W4311539250 created "2022-12-27" @default.
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- W4311539250 date "2022-12-15" @default.
- W4311539250 modified "2023-10-18" @default.
- W4311539250 title "Removing degeneracy and multimodality in gravitational wave source parameters" @default.
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- W4311539250 doi "https://doi.org/10.1103/physrevd.106.123015" @default.
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