Evidence for subdominant multipole moments and precession in merging black-hole-binaries from GWTC-2.1

Hoy, Charlie; Mills, Cameron; Fairhurst, Stephen

doi:10.48550/arxiv.2111.10455

Cited by 5 publications

(5 citation statements)

References 59 publications

(168 reference statements)

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“…Higher SNR signals or, in general, a signal with more than SNR∼ 6 − 7 in the higher-order modes could have more noticeable deviations from waveforms without higher-order modes where their power could then be picked up by the glitch model. However, current events with detectable higherorder mode content are below this SNR threshold [100][101][102][103][104].…”

Section: A Waveform Systematics: Higher-order Modesmentioning

confidence: 97%

Accurate modeling and mitigation of overlapping signals and glitches in gravitational-wave data

Hourihane,

Chatziioannou,

Wijngaarden

et al. 2022

Preprint

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Section: A Waveform Systematics: Higher-order Modesmentioning

confidence: 97%

Accurate modeling and mitigation of overlapping signals and glitches in gravitational-wave data

Hourihane,

Chatziioannou,

Wijngaarden

et al. 2022

Preprint

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“…Reassuringly, the set of events with best measured φJL contains those for which precession signatures have been reported before, namely GW200129 065458 [11,60], GW190412 [34,61,62], GW151226 [63], GW170818 [29] and GW190521 [64,65], as shown in Fig. 12.…”

Section: B Measurability Of Spin Azimuthmentioning

confidence: 97%

Removing degeneracy and multimodality in gravitational wave source parameters

Roulet¹,

Olsen²,

Mushkin³

et al. 2022

Preprint

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Quasicircular binary black hole mergers are described by 15 parameters, of which gravitational wave observations can typically constrain only ∼ 10 independent combinations to varying degree. In this work, we devise coordinates that remove correlations, and disentangle well-and poorlymeasured 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 can be measured remarkably well in the presence of orbital precession, and we anticipate that this will shed light on the occurrence of spin-orbit misalignment in nature.

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“…Most of these analyses use waveform models that neglect higher harmonics and spin precession. Since both of these effects are known to be important for an unbiased estimation of the parameters of the binary [167,170], a nonzero eccentricity measurement may still be driven by the inaccuracy of the waveform models. Even if these events are confirmed as having nonzero eccentricity, this would only exclude the primordial origin of two events.…”

Section: A Gwtc-3 Eventsmentioning

confidence: 99%

How to assess the primordial origin of single gravitational-wave events with mass, spin, eccentricity, and deformability measurements

et al. 2022

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A population of primordial black holes formed in the early Universe could contribute to at least a fraction of the black-hole merger events detectable by current and future gravitational-wave interferometers. With the ever-increasing number of detections, an important open problem is how to discriminate whether a given event is of primordial or astrophysical origin. We systematically present a comprehensive and interconnected list of discriminators that would allow us to rule out, or potentially claim, the primordial origin of a binary by measuring different parameters, including redshift, masses, spins, eccentricity, and tidal deformability. We estimate how accurately future detectors (such as the Einstein Telescope and LISA) could measure these quantities, and we quantify the constraining power of each discriminator for current interferometers. We apply this strategy to the GWTC-3 catalog of compact binary mergers. We show that current measurement uncertainties do not allow us to draw solid conclusions on the primordial origin of individual events, but this may become possible with next-generation ground-based detectors.

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Evidence for subdominant multipole moments and precession in merging black-hole-binaries from GWTC-2.1

Cited by 5 publications

References 59 publications

Accurate modeling and mitigation of overlapping signals and glitches in gravitational-wave data

Accurate modeling and mitigation of overlapping signals and glitches in gravitational-wave data

Removing degeneracy and multimodality in gravitational wave source parameters

How to assess the primordial origin of single gravitational-wave events with mass, spin, eccentricity, and deformability measurements

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