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When gravitational waves (GWs) from a spinning neutron star arrive from behind the Sun, they are subjected to gravitational lensing that imprints a frequency-dependent modulation on the waveform. This modulation traces the projected solar…

太阳与恒星天体物理 · 物理学 2023-10-09 Ryuichi Takahashi , Soichiro Morisaki , Teruaki Suyama

Long-term precise timing of Galactic millisecond pulsars holds great promise for measuring the long-period (months-to-years) astrophysical gravitational waves. Several gravitational-wave observational programs, called Pulsar Timing Arrays…

天体物理学 · 物理学 2009-11-13 Rutger van Haasteren , Yuri Levin , Patrick McDonald , Tingting Lu

We construct efficient banks of templates suitable for all-sky narrow-band searches of almost monochromatic gravitational waves originating from spinning neutron stars in our Galaxy in data collected by interferometric detectors. We…

广义相对论与量子宇宙学 · 物理学 2015-08-10 Andrzej Pisarski , Piotr Jaranowski

Aims. We estimate the number of pulsars, detectable as continuous gravitational wave sources with the current and future gravitational-wave detectors, assuming a simple phenomenological model of evolving non-axisymmetry of the rotating…

广义相对论与量子宇宙学 · 物理学 2021-05-19 Marek Cieślar , Tomasz Bulik , Małgorzata Curyło , Magdalena Sieniawska , Neha Singh , Michał Bejger

The emission of continuous gravitational waves (CWs), with duration much longer than the typical data taking runs, is expected from several sources, notably spinning neutron stars, asymmetric with respect to their rotation axis and more…

广义相对论与量子宇宙学 · 物理学 2023-11-13 S. D'Antonio , C. Palomba , P. Astone , S. Dall'Osso , S. Dal Pra , S. Frasca , P. Leaci , F. Muciaccia , O. J. Piccinni , L. Pierini , M. Serra

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

The HTRU-S Low Latitude survey data within 1$^{\circ}$of the Galactic Centre (GC) were searched for pulsars using the Fast Folding Algorithm (FFA). Unlike traditional Fast Fourier Transform (FFT) pipelines, the FFA optimally folds the data…

We present results of an all-sky search in the Parkes Pulsar Timing Array (PPTA) Data Release 1 data set for continuous gravitational waves (GWs) in the frequency range from $5\times 10^{-9}$ to $2\times 10^{-7}$ Hz. Such signals could be…

We propose a data processing technique that allows searches for a stochastic background of gravitational radiation with data from a single detector. Our technique exploits the difference between the coherence time of the gravitational wave…

广义相对论与量子宇宙学 · 物理学 2012-05-22 Massimo Tinto , J. W. Armstrong

We calculate the gravitational-wave (GW) signatures of detailed 3D core-collapse supernova simulations spanning a range of massive stars. Most of the simulations are carried out to times late enough to capture more than 95% of the total GW…

高能天体物理现象 · 物理学 2023-06-01 David Vartanyan , Adam Burrows , Tianshu Wang , Matthew S. B. Coleman , Christopher J. White

The problem of search for nearly periodic gravitational wave sources in the data from laser interferometric detectors is discussed using a simple model of the signal. Accuracies of estimation of the parameters and computational requirements…

广义相对论与量子宇宙学 · 物理学 2007-05-23 Andrzej Królak

This paper presents an efficient numerical sensitivity-estimation method and implementation for continuous-gravitational-wave searches, extending and generalizing an earlier analytic approach by Wette [1]. This estimation framework applies…

广义相对论与量子宇宙学 · 物理学 2018-11-07 Christoph Dreissigacker , Reinhard Prix , Karl Wette

Timing observations are crucial for determining the basic parameters of newly discovered pulsars. Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST) with the L-band 19-beam receiver covering the frequency range of…

高能天体物理现象 · 物理学 2023-10-12 W. Q. Su , J. L. Han , P. F. Wang , J. P. Yuan , Chen Wang , D. J. Zhou , Tao Wang , Yi Yan , W. C. Jing , Z. L. Yang , N. N. Cai , Xue Chen , Jun Xu , Lang Xie , H. G. Wang , R. X. Xu , X. P. You

Within the next decade gravitational-wave (GW) observations by Advanced LIGO in the United States, Advanced Virgo and GEO HF in Europe, and possibly other ground-based instruments will provide unprecedented opportunities to look directly…

太阳与恒星天体物理 · 物理学 2009-03-17 Benjamin J. Owen

Models of gravitational waveforms play a critical role in detecting and characterizing the gravitational waves (GWs) from compact binary coalescences. Waveforms from numerical relativity (NR), while highly accurate, are too computationally…

高能天体物理现象 · 物理学 2018-01-03 Zoheyr Doctor , Ben Farr , Daniel E. Holz , Michael Pürrer

Nonaxisymmetric, meridional circulation inside a neutron star, excited by a glitch and persisting throughout the post-glitch relaxation phase, emits gravitational radiation. Here, it is shown that the current quadrupole contributes more…

太阳与恒星天体物理 · 物理学 2015-05-19 M. F. Bennett , C. A. van Eysden , A. Melatos

We propose a new method of gravitational wave detection using a modified form of higher criticism, a statistical technique introduced by Donoho & Jin (2004). Higher criticism is designed to detect a group of sparse, weak sources, none of…

太阳与恒星天体物理 · 物理学 2015-06-15 M. F. Bennett , A. Melatos , A. Delaigle , P. Hall

Sun-like stellar oscillations are excited by turbulent convection and have been discovered in some 500 main sequence and sub-giant stars and in more than 12,000 red giant stars. When such stars are near gravitational wave sources, low-order…

太阳与恒星天体物理 · 物理学 2015-07-14 Ilídio Lopes , Joseph Silk

We describe an F-statistic search for continuous gravitational waves from galactic white-dwarf binaries in simulated LISA Data. Our search method employs a hierarchical template-grid based exploration of the parameter space. In the first…

广义相对论与量子宇宙学 · 物理学 2010-02-19 John T. Whelan , Reinhard Prix , Deepak Khurana

Detection of continuous gravitational waves from rapidly-spinning neutron stars opens up the possibility of examining their internal physics. We develop a framework that leverages a future continuous gravitational wave detection to infer a…

广义相对论与量子宇宙学 · 物理学 2023-02-15 Neil Lu , Karl Wette , Susan M. Scott , Andrew Melatos