Interpreting binary neutron star mergers: describing the binary neutron star dynamics, modelling gravitational waveforms, and analyzing detections

Dietrich, Tim; Hinderer, Tanja; Samajdar, A.

doi:10.1007/s10714-020-02751-6

Cited by 103 publications

(67 citation statements)

References 554 publications

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“…See also [37,38] for general definitions of the Dixon moments, including spins, or [39][40][41] for a more practical approach at the level of the action. 5 The dual of the Riemann tensor Rµνρσ is defined as R * µνρσ ≡ 1 2 ε µνλκ R λκ ρσ , where ε µνλκ stands for the totally anti-symmetric Levi-Civita tensor, with ε 0123 = √ −g. The underlined indices are to be excluded from the operation of symmetrization.…”

Section: Matter Action and Stress-energy Tensor A General Formalismmentioning

confidence: 99%

Tidal effects in the gravitational-wave phase evolution of compact binary systems to next-to-next-to-leading post-Newtonian order

2020

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We compute the gravitational-wave (GW) energy flux up to the next-to-next-to-leading (NNL) order of tidal effects in a spinless compact binary system on quasi-circular orbits. Starting from an effective matter action, we obtain the stress-energy tensor of the system, which we use in a GW generation formalism based on multipolar-post-Minkowskian (MPM) and post-Newtonian (PN) approximations. The tidal contributions to the multipole moments of the system are first obtained, from which we deduce the instantaneous GW energy flux to NNL order (formally 7PN order). We also include the remaining tidal contributions of GW tails to the leading (formally 6.5PN) and NL (7.5PN) orders. Combining it with our previous work on the conservative equations of motion (EoM) and associated energy, we get the GW phase and frequency evolution through the flux-balance equation to the same NNL order. These results extend and complete several preceding results in the literature.

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Section: Matter Action and Stress-energy Tensor A General Formalismmentioning

confidence: 99%

Tidal effects in the gravitational-wave phase evolution of compact binary systems to next-to-next-to-leading post-Newtonian order

2020

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“…Our results suggest that this constraining power will improve when numerical models of merger outflows, telescope sensitivity, and GW detectors progress (see, e.g., Chornock et al 2019;Cowperthwaite et al 2019;Palmese et al 2019). Currently, significant effort is underway to add more sophisticated treatments of microphysical processes to numerical models, as well as increase the coverage of the parameter space studied with these models (Baiotti & Rezzolla 2017;Shibata & Hotokezaka 2019;Ciolfi 2020;Dietrich et al 2021;Ruiz et al 2021). The Vera Rubin Observatory, an optical, wide-field telescope expected to begin operations in 2021 (Ivezić et al 2019), will have a large impact on taking high-accuracy EM data and detecting GW events at larger distances, while telescopes such as ZTF (Dekany et al 2020) and (near-future) dedicated GW follow-up telescopes such as BlackGEM (Bloemen et al 2016) and GOTO (Gompertz et al 2020) will increase the number of detected EM counterparts.…”

Section: Discussionmentioning

confidence: 99%

The Challenges Ahead for Multimessenger Analyses of Gravitational Waves and Kilonova: A Case Study on GW190425

Raaijmakers

Nissanke

Foucart

et al. 2021

ApJ

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In recent years, there have been significant advances in multimessenger astronomy due to the discovery of the first, and so far only confirmed, gravitational wave event with a simultaneous electromagnetic (EM) counterpart, as well as improvements in numerical simulations, gravitational wave (GW) detectors, and transient astronomy. This has led to the exciting possibility of performing joint analyses of the GW and EM data, providing additional constraints on fundamental properties of the binary progenitor and merger remnant. Here, we present a new Bayesian framework that allows inference of these properties, while taking into account the systematic modeling uncertainties that arise when mapping from GW binary progenitor properties to photometric light curves. We extend the relative binning method presented in Zackay et al. to include extrinsic GW parameters for fast analysis of the GW signal. The focus of our EM framework is on light curves arising from r-process nucleosynthesis in the ejected material during and after merger, the so-called kilonova, and particularly on black hole−neutron star systems. As a case study, we examine the recent detection of GW190425, where the primary object is consistent with being either a black hole or a neutron star. We show quantitatively how improved mapping between binary progenitor and outflow properties, and/or an increase in EM data quantity and quality are required in order to break degeneracies in the fundamental source parameters.

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“…In this paper we investigate the effects of tidal deformations [93][94][95] on the conservative two-body Hamiltonian during the inspiral phase, focusing on their structure in the post-Minkowskian expansion. The tidal deformations offer a window into the equation of state of neutrons stars [96][97][98][99] and test our understanding of black holes [83,[100][101][102][103][104][105][106][107] and of possible exotic physics [108][109][110][111][112][113][114].…”

Section: Introductionmentioning

confidence: 99%

Leading nonlinear tidal effects and scattering amplitudes

Bern¹,

Parra-Martinez

Roiban

et al. 2021

J. High Energ. Phys.

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We present the two-body Hamiltonian and associated eikonal phase, to leading post-Minkowskian order, for infinitely many tidal deformations described by operators with arbitrary powers of the curvature tensor. Scattering amplitudes in momentum and position space provide systematic complementary approaches. For the tidal operators quadratic in curvature, which describe the linear response to an external gravitational field, we work out the leading post-Minkowskian contributions using a basis of operators with arbitrary numbers of derivatives which are in one-to-one correspondence with the worldline multipole operators. Explicit examples are used to show that the same techniques apply to both bodies interacting tidally with a spinning particle, for which we find the leading contributions from quadratic in curvature tidal operators with an arbitrary number of derivatives, and to effective field theory extensions of general relativity. We also note that the leading post-Minkowskian order contributions from higher-dimension operators manifest double-copy relations. Finally, we comment on the structure of higher-order corrections.

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Interpreting binary neutron star mergers: describing the binary neutron star dynamics, modelling gravitational waveforms, and analyzing detections

Cited by 103 publications

References 554 publications

Tidal effects in the gravitational-wave phase evolution of compact binary systems to next-to-next-to-leading post-Newtonian order

Tidal effects in the gravitational-wave phase evolution of compact binary systems to next-to-next-to-leading post-Newtonian order

The Challenges Ahead for Multimessenger Analyses of Gravitational Waves and Kilonova: A Case Study on GW190425

Leading nonlinear tidal effects and scattering amplitudes

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