Results 21 to 30 of about 27,580 (246)
Pseudoplane-wave gravitational calibrator for gravitational wave observatories
Physical Review D, 2023 The precisions of existing gravitational calibrators for gravitational wave observatories are limited by their dependence on the relative position between the calibrators and the observatory's test masses. Here we present a novel geometry consisting of four quadrupole rotors placed at the vertices of a rectangle centered on the test mass.
M. P. Ross +10 more
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Nuclear Physics B - Proceedings Supplements, 1994 In the last few years there have been a number of significant developments in research towards the detection of gravitational radiation from astronomical objects. The construction of 3 large-scale (3- or 4-km) interferometric detectors has been funded; new high-sensitivity bars are under construction; there is a serious proposal using two ...
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Gravitational Lensing of Continuous Gravitational Waves [PDF]
Universe, 2021 Continuous gravitational waves are analogous to monochromatic light and could therefore be used to detect wave effects such as interference or diffraction. This would be possible with strongly lensed gravitational waves. This article reviews and summarises the theory of gravitational lensing in the context of gravitational waves in two different ...
Marek Biesiada, Sreekanth Harikumar
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The Polarizations of Gravitational Waves [PDF]
Universe, 2018 The gravitational wave provides a new method to examine General Relativity and its alternatives in the high speed, strong field regime. Alternative theories of gravity generally predict more polarizations than General Relativity, so it is important to study the polarization contents of theories of gravity to reveal the nature of gravity.
Yungui Gong, Shaoqi Hou
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Gravitational waves at their own gravitational speed [PDF]
International Journal of Modern Physics D, 2018 Gravitational waves propagate at the speed of light in general relativity, because of their special relativistic basis. However, light propagation is linked to the electromagnetic phenomena, with the permittivity and permeability constants as the determining factors.
C. S. Unnikrishnan, George T. Gillies
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The gravitational-wave physics [PDF]
National Science Review, 2017 Abstract The direct detection of gravitational wave by Laser Interferometer Gravitational-Wave Observatory indicates the coming of the era of gravitational-wave astronomy and gravitational-wave cosmology. It is expected that more and more gravitational-wave events will be detected by currently existing and planned gravitational-wave ...
Tao Yang +5 more
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Astronomische Nachrichten, Volume 343, Issue 9-10, November-December 2022., 2022 Abstract The advent of ultra‐precise photometry space missions enables the possibility of investigating stellar interiors with mixed modes. The structural variations induced by the discontinuity of the chemical composition left behind during the first dredge–up is an important feature in the stellar mid‐layers located between the hydrogen‐burning shell
Chen Jiang
wiley +1 more source
GRAVITATIONAL WAVES IN THE HYPERSPACE? [PDF]
Modern Physics Letters A, 2009 In the framework of the debate on high-frequency gravitational waves (GWs), after a review of GWs in standard General Relativity, which is due for completness, the possibility of merging such a traditional analysis with the hyperspace formalism that has been recently introduced in some papers in the literature, with the goal of a better understanding ...
Christian Corda +2 more
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Characteristics of the pressure profile in the accelerator on the RF negative ion source at ASIPP
Nanotechnology and Precision Engineering, 2023 Neutral beam injection (NBI) systems based on negative hydrogen ion sources—rather than the positive ion sources that have typically been used to date—will be used in the future magnetically confined nuclear fusion experiments to heat the plasma.
Wu Mingshan +4 more
doaj +1 more source
Scientific Reports, 2021 Very high-quality sapphire substrates are key elements of the cryogenic Japanese gravitational interferometer KAGRA, in which they are used to build the main mirrors, working as the test masses to sense the gravitational waves.
Manuel Marchiò +3 more
doaj +1 more source