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Based on the relationship between proper distance and coordinate distance, the geometrical phenomenon caused by the passing gravitational waves can not be observed locally. The electromagnetic wave equations in the background gravitational…

广义相对论与量子宇宙学 · 物理学 2018-11-13 Wenyu Wang , Yang Xu

The advanced gravitational wave (GW) detector network has started {routine detection of } signals from merging compact binaries. Data indicate that in a fair fraction of these sources, at least one component was a neutron star, bringing…

高能天体物理现象 · 物理学 2022-09-29 Akshat Singhal , Sourav Palit , Suman Bala , Gaurav Waratkar , Harsh Kumar , Varun Bhalerao

Next-generation gravitational-wave detectors will provide unprecedented sensitivity to inspiraling binary neutron stars and black holes, enabling detections at the peak of star formation and beyond. However, the signals from these systems…

天体物理仪器与方法 · 物理学 2024-02-22 Andrew L. Miller , Neha Singh , Cristiano Palomba

Precision pulsar timing at the level of tens to hundreds of nanoseconds allows detection of nanohertz gravitational waves (GWs) from supermassive binary black holes (SMBBHs) at the cores of merging galaxies and, potentially, from exotic…

天体物理仪器与方法 · 物理学 2019-03-25 J. M. Cordes , M. A. McLaughlin

This article provides an overview of stellar instabilities as sources of gravitational waves. The aim is to put recent work on secular and dynamical instabilities in compact stars in context, and to summarize the current thinking about the…

天体物理学 · 物理学 2017-08-23 N. Andersson

It is believed that cores of neutron stars provide a natural laboratory where exotic high baryon density QCD phases may exist.The theoretically well established {\it neutron superfluid phase} is also believed to be found only inside neutron…

高能天体物理现象 · 物理学 2024-06-25 Partha Bagchi , Oindrila Ganguly , Biswanath Layek , Anjishnu Sarkar , Ajit M. Srivastava

In this review we examine the dynamics and gravitational wave detectability of rotating strained neutron stars. The discussion is divided into two halves: triaxial stars, and precessing stars. We summarise recent work on how crustal strains…

广义相对论与量子宇宙学 · 物理学 2009-11-07 D. I. Jones

We provide a bird's-eye view of neutron-star seismology, which aims to probe the extreme physics associated with these objects, in the context of gravitational-wave astronomy. Focussing on the fundamental mode of oscillation, which is an…

广义相对论与量子宇宙学 · 物理学 2021-03-19 N. Andersson

Two classes of high energy sources in our galaxy are believed to host magnetars, neutron stars whose emission results from the dissipation of their magnetic field. The extremely high magnetic field of magnetars distorts their shape, and…

宇宙学与河外天体物理 · 物理学 2015-05-19 Stefania Marassi , Riccardo Ciolfi , Raffaella Schneider , Luigi Stella , Valeria Ferrari

As is well known, gravitational wave detections of coalescing binaries are standard sirens, allowing a measurement of source distance by gravitational wave means alone. In this paper we explore the analogue of this capability for continuous…

高能天体物理现象 · 物理学 2021-12-15 M. Sieniawska , D. I. Jones

We examine the accuracy of estimation of parameters of the gravitational-wave signals from spinning neutron stars that can be achieved from observations by Earth-based laser interferometers. We consider a model of the signal consisting of…

广义相对论与量子宇宙学 · 物理学 2009-10-31 Piotr Jaranowski , Andrzej Królak

We present a simplified description of a rotating neutron star emitting gravitational waves. We describe the system by an uniformly rotating triaxial homogeneous ellipsoid to catch the main aspects of the evolution. We construct an…

太阳与恒星天体物理 · 物理学 2013-08-13 Ana Maria Endler , Sérgio Barbosa Duarte , Hilário Rodrigues , Marcelo Chiapparini

The Rossby mode (r-mode) perturbations in pulsars as a steady gravitational wave (GW) sources have been explored. The time evolution and the intensity of the emitted GWs in terms of the strain tensor amplitude have been estimated with the…

核理论 · 物理学 2023-05-01 Joydev Lahiri , D. N. Basu

Neutron stars are known to show accelerated spin-up of their rotational frequency called a glitch. Highly magnetized rotating neutron stars (pulsars) are frequently observed by radio telescopes (and in other frequencies), where the glitch…

高能天体物理现象 · 物理学 2022-11-30 Dixeena Lopez , Shubhanshu Tiwari , Marco Drago , David Keitel , Claudia Lazzaro , Giovanni Andrea Prodi

Neutron stars such as pulsars and magnetars lose angular momentum primarily through electromagnetic dipole radiation, gravitational waves, $r$-mode oscillation, and also affected by fallback accretion processes. However, anomalous spin…

高能天体物理现象 · 物理学 2025-12-29 Indra Kumar Banerjee , Sandeep Chatterjee , Biswarup Das , Ujjal Kumar Dey

The rotation frequencies of young pulsars are systematically below their theoretical Kepler limit. R-modes have been suggested as a possible explanation for this observation. With the help of semi-analytic expressions that make it possible…

广义相对论与量子宇宙学 · 物理学 2018-07-25 Mark G. Alford , Kai Schwenzer

In this paper we investigate the effect of a pinned superfluid component on the gravitational wave emission of a steadily rotating deformed neutron star. We show that the superfluid pinning allows the possibility for there to be…

太阳与恒星天体物理 · 物理学 2015-05-14 D. I. Jones

Gravitational wave detectors are already operating at interesting sensitivity levels, and they have an upgrade path that should result in secure detections by 2014. We review the physics of gravitational waves, how they interact with…

广义相对论与量子宇宙学 · 物理学 2015-05-13 B. S. Sathyaprakash , B. F. Schutz

The sensitivity of pulsar timing arrays to gravitational waves is, at some level, limited by timing noise. Red timing noise - the stochastic wandering of pulse arrival times with a red spectrum - is prevalent in slow-spinning pulsars and…

高能天体物理现象 · 物理学 2015-06-24 Paul D. Lasky , Andrew Melatos , Vikram Ravi , George Hobbs

Gravitational waves are a radically new way to peer into the darkest depths of the cosmos. Pulsars can be used to make direct detections of gravitational waves through precision timing. When a gravitational wave passes between a pulsar and…

高能天体物理现象 · 物理学 2021-05-28 Stephen R. Taylor