Detecting the gravitational wave memory effect with TianQin

Sun, Shuhui; Shi, Changfu; Zhang, Jiandong; Mei, Jianwei

doi:10.48550/arxiv.2207.13009

Cited by 2 publications

(8 citation statements)

References 98 publications

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“…[80] we did not find any significant enhancement in the distance estimation by the inclusion of memory on the BBH waveforms. We do however find a greater number of events with detectable memory at LISA as compared to previous forecasts [67,69], especially in our models with heavy BH seeds.…”

Section: Introductioncontrasting

confidence: 84%

“…[82], which used a Cauchy-characteristic extraction (CCE) technique to extract the waveform. Alternatively, the Bondi, van der Burg, Metzner, and Sachs (BMS) balance laws [83] have recently been used to add the memory to waveforms [84,85] (see also [57,69]).…”

Section: Ii1 Computation Scheme: Thorne's Formulamentioning

confidence: 99%

“…Indeed, whereas truncating the primary waveform at some minimum f in (related to the time/cycles prior to merger) significantly reduces the SNR of the primary, the SNR of the memory is almost unchanged (as also noted in Refs. [62,69]). As long as the memory is observed in LISA for a period of at least 10 3 s ≈ 15 min after merger, its SNR is approximately independent of the observation time (c.f.…”

Section: Ii2 Phenomenology Of the Signalmentioning

confidence: 99%

“…However, the prospects for memory detection in single events are considerably better for third-generation ground-based detectors (e.g. Einstein Telescope [64] and Cosmic Explorer [65]) and for the future space-based detectors LISA and Tian-Qin, due to their better sensitivity and low frequency coverage [54,62,[66][67][68][69]. 4 In this work we investigate the impact of the nonlinear memory on parameter estimation via a Fisher matrix analysis.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Can gravitational-wave memory help constrain binary black-hole parameters? A LISA case study

Gasparotto¹,

Vicente²,

Blas³

et al. 2023

Preprint

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Besides the transient effect, the passage of a gravitational wave also causes a persistent displacement in the relative position of an interferometer's test masses through the nonlinear memory effect. This effect is generated by the gravitational backreaction of the waves themselves, and encodes additional information about the source. In this work, we explore the implications of using this information for the parameter estimation of massive binary black holes with LISA. Based on a Fisher analysis, our results show that the memory can help to reduce the degeneracy between the luminosity distance and the inclination for binaries observed only for a short time (∼ few hours) before merger. To assess how many such short signals will be detected, we utilized state-of-the-art predictions for the population of massive black hole binaries and models for the gaps expected in the LISA data. We forecast from tens to few hundreds of binaries with observable memory, but only ∼ O(0.1) events in 4 years for which the memory helps to reduce the degeneracy between distance and inclination. Based on this, we conclude that the new information from the non-linear memory, while promising for testing general relativity in the strong field regime, has probably a limited impact on further constraining the uncertainty on massive black hole binary parameters with LISA.1 Nevertheless, in the ∼ 100 GW signals observed to date there is only limited evidence for higher multipole content (with no evidence at all beyond = 3) [36] and only one measurement of strong-field precession has been claimed [37] (though some doubt has been cast on this claim due to data-quality issues [38,39]).

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Section: Introductioncontrasting

confidence: 84%

Section: Ii1 Computation Scheme: Thorne's Formulamentioning

confidence: 99%

Section: Ii2 Phenomenology Of the Signalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Can gravitational-wave memory help constrain binary black-hole parameters? A LISA case study

Gasparotto¹,

Vicente²,

Blas³

et al. 2023

Preprint

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show abstract

“…We have turned to GW spacetimes in an effort to further test the model against the requirement R1, as discussed in the first section. The general GW solution in an asymptotically flat background has been known for a long time and is described by the Bondi-Sachs metric [56][57][58]. So to study the properties of hidden fluid underlying GW spacetimes, one may transform the Bondi-Sachs metric into the form of (5) through a coordinate transformation.…”

Section: The General Gravitational Wave Solution In the Hidden Fluid ...mentioning

confidence: 99%

A hydrodynamical description of gravitational waves

Mei

2023

Eur. Phys. J. C

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It is easy to reason that gravity might be the effect of a fluid in disguise, as it will naturally arise in emergent gravity models where gravity is due to the effect of some fundamental particles, with the latter expected to behave collectively like a fluid at the macroscopic scale. We call this the fluid/gravity equivalence. The key difficulty with the fluid/gravity equivalence is to find the correct metric–fluid relation (the relation between the emergent metric and the fluid properties) so that the fluid not only has physically acceptable properties but also obeys the usual hydrodynamic equations, while at the same time the emergent metric also obeys the Einstein equations. Faced with the problem, we have previously made a tentative proposal of the metric–fluid relation, focusing only on obtaining physically acceptable predictions on the fluid properties. In this paper, however, we find that for the general gravitational wave spacetime near the null infinity, the underlying fluid not only has physically acceptable properties, but also satisfies the expected relativistic hydrodynamic equations in the Minkowski background, thus providing a concrete example satisfying both of the major requirements expected for the fluid/gravity equivalence.

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Detecting the gravitational wave memory effect with TianQin

Cited by 2 publications

References 98 publications

Can gravitational-wave memory help constrain binary black-hole parameters? A LISA case study

Can gravitational-wave memory help constrain binary black-hole parameters? A LISA case study

A hydrodynamical description of gravitational waves

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