scholarly journals Impact of three-nucleon forces on gravitational wave emission from neutron stars

2021 ◽  
Vol 104 (8) ◽  
Author(s):  
Lucas Tonetto ◽  
Andrea Sabatucci ◽  
Omar Benhar
Keyword(s):  
Neutron Stars ◽  
Gravitational Wave ◽  
Wave Emission

NEW ASPECTS ON GRAVITATIONAL WAVE EMISSION BY NEUTRON STARS

2004 ◽  
Vol 13 (07) ◽  
pp. 1293-1296 ◽  
Author(s):  
GUILHERME F. MARRANGHELLO ◽  
CÉSAR A. Z. VASCONCELLOS ◽  
JOSÉ A. de FREITAS PACHECO ◽  
MANFRED DILLIG ◽  
HÉLIO T. COELHO
Keyword(s):  
Phase Transition ◽  
Equation Of State ◽  
Neutron Stars ◽  
Nuclear Matter ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Quark Matter ◽  
Inner Core ◽  
Compact Objects ◽  
Wave Emission

We discuss, in this work, new aspects related to the emission of gravitational waves by neutron stars, which undergo a phase transition, from nuclear to quark matter, in its inner core. Such a phase transition would liberate around 1052–53 erg of energy in the form of gravitational waves which, if detected, may shed some light in the structure of these compact objects and provide new insights on the equation of state of nuclear matter.

scholarly journals Population synthesis of accreting neutron stars emitting gravitational waves

2019 ◽  
Vol 488 (1) ◽  
pp. 99-110 ◽  
Author(s):  
Fabian Gittins ◽  
Nils Andersson
Keyword(s):  
Neutron Stars ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Population Synthesis ◽  
Spin Distribution ◽  
Synthetic Populations ◽  
Low Mass ◽  
Wave Emission ◽  
X Ray Binaries ◽  
Production Mechanisms

ABSTRACT The fastest-spinning neutron stars in low-mass X-ray binaries, despite having undergone millions of years of accretion, have been observed to spin well below the Keplerian break-up frequency. We simulate the spin evolution of synthetic populations of accreting neutron stars in order to assess whether gravitational waves can explain this behaviour and provide the distribution of spins that is observed. We model both persistent and transient accretion and consider two gravitational-wave-production mechanisms that could be present in these systems: thermal mountains and unstable rmodes. We consider the case of no gravitational-wave emission and observe that this does not match well with observation. We find evidence for gravitational waves being able to provide the observed spin distribution; the most promising mechanisms being a permanent quadrupole, thermal mountains, and unstable r modes. However, based on the resultant distributions alone, it is difficult to distinguish between the competing mechanisms.

The Discovery of Gravitational Wave Emission

2018 ◽  
pp. 103-105
Author(s):  
Alvaro De Rújula
Keyword(s):  
General Relativity ◽  
Neutron Stars ◽  
Gravitational Wave ◽  
Binary Stars ◽  
Binary Pulsar ◽  
Wave Emission

Neutron stars, binary stars and pulsars. The Arecibo radio antenna. The discovery of the first binary pulsar (PS1913+16) by Husle and Taylor. This pulsar’s understanding in general relativity: A fantastic success.

scholarly journals NON-RADIAL OSCILLATIONS OF NEUTRON STARS AND THE DETECTION OF GRAVITATIONAL WAVES

2012 ◽  
Vol 18 ◽  
pp. 48-52 ◽  
Author(s):  
CECILIA CHIRENTI ◽  
PATRICK R. SILVEIRA ◽  
ODYLIO D. AGUIAR
Keyword(s):  
Neutron Stars ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Sensitivity Range ◽  
Wave Emission ◽  
Spherical Detector

We study the non-radial oscillations of relativistic neutron stars, in particular the (fundamental) f-modes, which are believed to be the most relevant for the gravitational wave emission of perturbed isolated stars. The expected frequencies of the f-modes are compared to the sensitivity range of Mario Schenberg, the Brazilian gravitational wave spherical detector.

scholarly journals Gravitational Waveforms from Multiple-Orbit Simulations of Binary Neutron Stars

2016 ◽  
Vol 25 (4) ◽  
pp. 299
Author(s):  
Nguyen Quynh Lan ◽  
In-Saeng Suh ◽  
Grant J Mathews ◽  
Reese Haywood
Keyword(s):  
Neutron Stars ◽  
Gravitational Wave ◽  
Circular Orbit ◽  
Equal Mass ◽  
Relativistic Hydrodynamic ◽  
Stable Circular Orbit ◽  
Hydrodynamic Response ◽  
Wave Forms ◽  
General Relativistic ◽  
Wave Emission

We study the gravitational wave emission of equal-mass neutron stars in binary orbits as the stars approach the inner most last stable circular orbit. We illustrate the extraction of gravitational wave forms in a sequence of quasi-circular orbit simulations including the general relativistic hydrodynamic response of the stars. We compare the computed results with the Newtonian and post Newtonian results and show that substantial differences can arise as the orbits approach the final inspiral.

scholarly journals Phase transitions in neutron stars and gravitational wave emission

2002 ◽  
Vol 66 (6) ◽  
Author(s):  
G. F. Marranghello ◽  
Cesar A. Z. Vasconcellos ◽  
J. A. de Freitas Pacheco
Keyword(s):  
Phase Transitions ◽  
Neutron Stars ◽  
Gravitational Wave ◽  
Wave Emission

scholarly journals The Stochastic Gravitational Wave Background from Magnetars

Universe ◽  
2021 ◽  
Vol 7 (10) ◽  
pp. 381
Author(s):  
Sourav Roy Chowdhury ◽  
Maxim Khlopov
Keyword(s):  
Magnetic Field ◽  
Neutron Star ◽  
Neutron Stars ◽  
Gravitational Wave ◽  
Rotation Axis ◽  
Potential Candidate ◽  
Gravitational Wave Detectors ◽  
Wave Emission ◽  
Gravitational Wave Background ◽  
The Universe

Magnetars have already been a potential candidate as gravitational wave sources that could be detected by current and future terrestrial as well as ground-based gravitational wave detectors. In this article, we focus on the gravitational wave emission from the distorted rotating neutron stars. The deformation is assumed to be symmetric around an axis that is perpendicular to the rotation axis. The form is applied in the context of a neutron star whose magnetic field has been deformed on its own. By introducing the effects from all magnetars in the Universe, based on various proposed magnetic field configurations, such as poloidal and toroidal, the stochastic gravitational wave background can be generated. We choose to figure out exactly how the observations of the stochastic gravitational wave background should be used to understand much more about physics correlated with the magnetar behavior, based on the restriction on the ellipticity of the magnetar.

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