Evolution of inspiralling neutron star binaries: Effects of tidal interactions and orbital eccentricities

Wang, Jie-Shuang; Lai, Dong

doi:10.1103/physrevd.102.083005

Cited by 9 publications

(3 citation statements)

References 50 publications

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“…It has been suggested that the crust breaking strain is around 0.1 [74], which corresponds to a critical ellipticity of c ≈ δR/R ≈ 4 × 10 −6 , where R + δR is the elongated NS radius. This can be easily reached by the tidally-induced f-mode oscillation in the last seconds before the merger [65] (see also Figure 3 of Reference [75]). Recent works show that the g-mode can also lead to the breaking of the NS crust [66].…”

Section: Ns Crust Crack Modelmentioning

confidence: 95%

Electromagnetic Precursors of Short Gamma-Ray Bursts as Counterparts of Gravitational Waves

Wang

Liu

2021

Galaxies

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Precursor emissions are found in some short gamma-ray bursts (SGRBs). In this paper, we review the theories and observations of the SGRB precursor and discuss its prospect as an electromagnetic counterpart of the gravitational wave event produced by neutron star (NS) mergers. The observed luminosity, spectrum, and duration of precursors are explained by the magnetospheric interaction model during the inspiral or the cocoon/jet shock breakout model during the jet propagation. In general, these two models predict that the precursor will be weaker than the main GRB, but will be of a larger opening angle, which makes it an advantageous gamma-ray counterpart for NS mergers in the local Universe, especially for NS - black hole mergers with very low mass ratios, in which the main GRBs are not expected. The joint observation of the precursor, SGRB, and gravitational wave will help to reveal the jet launch mechanism and post-merger remnant.

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Section: Ns Crust Crack Modelmentioning

confidence: 95%

Electromagnetic Precursors of Short Gamma-Ray Bursts as Counterparts of Gravitational Waves

Wang

Liu

2021

Galaxies

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“…Their dissipation and the quadrupolar moment they induce modify the inspiral and cause changes in orbital frequency and phase shifts (e.g. Bildsten and Cutler 1992;Wang and Lai 2020;McNeill et al 2020). Thus, WD binaries and NS binaries will behave and evolve differently, which will manifest in the LISA GW background.…”

Section: Tides and Angular Momentum Transportmentioning

confidence: 99%

Astrophysics with the Laser Interferometer Space Antenna

et al. 2023

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The Laser Interferometer Space Antenna (LISA) will be a transformative experiment for gravitational wave astronomy, and, as such, it will offer unique opportunities to address many key astrophysical questions in a completely novel way. The synergy with ground-based and space-born instruments in the electromagnetic domain, by enabling multi-messenger observations, will add further to the discovery potential of LISA. The next decade is crucial to prepare the astrophysical community for LISA’s first observations. This review outlines the extensive landscape of astrophysical theory, numerical simulations, and astronomical observations that are instrumental for modeling and interpreting the upcoming LISA datastream. To this aim, the current knowledge in three main source classes for LISA is reviewed; ultra-compact stellar-mass binaries, massive black hole binaries, and extreme or interme-diate mass ratio inspirals. The relevant astrophysical processes and the established modeling techniques are summarized. Likewise, open issues and gaps in our understanding of these sources are highlighted, along with an indication of how LISA could help making progress in the different areas. New research avenues that LISA itself, or its joint exploitation with upcoming studies in the electromagnetic domain, will enable, are also illustrated. Improvements in modeling and analysis approaches, such as the combination of numerical simulations and modern data science techniques, are discussed. This review is intended to be a starting point for using LISA as a new discovery tool for understanding our Universe.

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“…This corresponds to the well-known circular motion in the Newtonian picture of two point-masses in gravitational interaction. However, it has been shown that a number of physical effects, such as the backreaction induced by gravitational radiation [14] or the dynamical tides [38][39][40][41][42][43][44], can make GBs exhibit a continuous frequency shift, which can potentially be detected over the time-span of the LISA mission. The monochromatic approximation for GBs is motivated by gravitational radiation which is an efficient mechanism for orbit circularization.…”

Section: Introductionmentioning

confidence: 99%

Impact of dipolar magnetic fields on gravitational wave strain by galactic binaries

Bourgoin,

Poncin-Lafitte,

Mathis

et al. 2022

Preprint

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White dwarfs (WDs) and neutron stars (NSs) are among the most magnetized astrophysical objects in the universe, with magnetic fields that can reach up to 10 9 G for WDs and up to 10 15 G for NSs. The galaxy is expected to be populated with approximately one hundred million of double WD and millions of NS-WD binaries. Throughout the duration of the mission, the Laser Interferometer Space Antenna (LISA) will observe gravitational waves (GWs) emitted simultaneously by more than ten thousand of such galactic binaries. In this paper, we investigate the effect of the magnetic dipole-dipole interaction on the GW signal emitted by magnetic galactic binaries. We derive the secular equations governing the orbital and rotational motion of these objects. Then, we integrate these equations both numerically and analytically. We conclude that the overall visible effect is an additional secular drift of the mean longitude. This drift is proportional to the product of the magnetic moments and is inversely proportional to the 7/2 power of the semi-major axis. Finally, we show that, at zeroth-order in eccentricity, the magnetic dipole-dipole interaction shifts the main frequency of the gravitational strain measured by LISA.

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Evolution of inspiralling neutron star binaries: Effects of tidal interactions and orbital eccentricities

Cited by 9 publications

References 50 publications

Electromagnetic Precursors of Short Gamma-Ray Bursts as Counterparts of Gravitational Waves

Electromagnetic Precursors of Short Gamma-Ray Bursts as Counterparts of Gravitational Waves

Astrophysics with the Laser Interferometer Space Antenna

Impact of dipolar magnetic fields on gravitational wave strain by galactic binaries

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