Gravitational radiation of a plasma and transformation of electromagnetic waves into gravitational waves

1983 ◽  
Vol 26 (12) ◽  
pp. 1110-1113 ◽  
Author(s):  
D. V. Gal'tsov ◽  
Yu. V. Grats ◽  
E. Yu. Melkumova
Keyword(s):  
Gravitational Waves ◽  
Gravitational Radiation ◽  
Electromagnetic Waves

scholarly journals Continuous Gravitational Waves from Neutron Stars: Current Status and Prospects

Universe ◽  
2019 ◽  
Vol 5 (11) ◽  
pp. 217 ◽  
Author(s):  
Magdalena Sieniawska ◽  
Michał Bejger
Keyword(s):  
Neutron Stars ◽  
Gravitational Waves ◽  
Gravitational Radiation ◽  
Elastic Strain ◽  
Electromagnetic Waves ◽  
Current Status ◽  
Free Precession ◽  
Oscillation Modes ◽  
Unstable Oscillation ◽  
The Universe

Gravitational waves astronomy allows us to study objects and events invisible in electromagnetic waves. It is crucial to validate the theories and models of the most mysterious and extreme matter in the Universe: the neutron stars. In addition to inspirals and mergers of neutrons stars, there are currently a few proposed mechanisms that can trigger radiation of long-lasting gravitational radiation from neutron stars, such as e.g., elastically and/or magnetically driven deformations: mountains on the stellar surface supported by the elastic strain or magnetic field, free precession, or unstable oscillation modes (e.g., the r-modes). The astrophysical motivation for continuous gravitational waves searches, current LIGO and Virgo strategies of data analysis and prospects are reviewed in this work.

scholarly journals Electromagnetic Detectors of Gravitational Waves

1974 ◽  
Vol 64 ◽  
pp. 54-58
Author(s):  
V. B. Braginsky ◽  
L. P. Grishchuk ◽  
A. G. Doroshkievich ◽  
Ya. B. Zel'Dovich ◽  
I. D. Novikov ◽  
...  
Keyword(s):  
Gravitational Waves ◽  
Electromagnetic Waves ◽  
Reverse Process

Our group is investigating highfrequency gravitational waves (GW). The most promising approach to detection and laboratory generation of such GW seems to be through the transformation of GW into electromagnetic waves (EMW), and the reverse process: EMW→GW. The effects are small of course.

Do electromagnetic waves harbour gravitational waves?

2006 ◽  
Vol 462 (2071) ◽  
pp. 1987-2000 ◽  
Author(s):  
Brian Bramson
Keyword(s):  
General Relativity ◽  
Gravitational Waves ◽  
Electric Dipole ◽  
Electromagnetic Waves ◽  
Maxwell Theory ◽  
Flat Spacetime

In linearized, Einstein–Maxwell theory on flat spacetime, an oscillating electric dipole is the source of a spin-2 field. Within this approximation to general relativity, it is shown that electromagnetic waves harbour gravitational waves.

scholarly journals Gravitons From a Spinning Rod

1978 ◽  
Vol 31 (2) ◽  
pp. 205
Author(s):  
George L Murphy
Keyword(s):  
Gravitational Waves ◽  
Gravitational Radiation

It is shown that the gravitational radiation from a spinning rod cannot be calculated c1assicaJly unless the mass of the rod exceeds several tonnes. If laboratory sources of gravitational waves ever become feasible, they will have to be described quantum mechanically, and should make possible the detection of individual gravitons.

The New Messengers

2021 ◽  
pp. 36-52
Author(s):  
Gianfranco Bertone
Keyword(s):  
Gravitational Waves ◽  
Nobel Prize ◽  
Direct Contact ◽  
Thin Shell ◽  
Electromagnetic Waves ◽  
Scientific Community ◽  
The Other ◽  
The Moon ◽  
New Era ◽  
The Universe

I present the momentous discovery of gravitational waves, announced in 2016, starting from a confused Einstein who in 1936 tries to convince the scientific community that gravitational waves cannot exist (!), and then illustrating the extraordinary insights and breakthroughs that led 2017 Nobel Prize winners B. Barish, K. Thorne and R. Weiss to open an entirely new window on the Universe. This achievement has marked the beginning of a new era in science, and upcoming experiments have the potential to truly revolutionize our understanding of the Universe. Accounts of the perception of extra-terrestrial reality with senses beyond sight, such as those offered by astronauts who have been on the Moon, are exceedingly rare. That is hardly unsurprising: touch and taste require direct contact, while hearing and smell operate only over short distances, and are in any case confined to the Earth’s thin shell of atmosphere. Sight, on the other hand, allows us to collect the electromagnetic waves emitted by extraordinarily remote celestial objects.

scholarly journals Gravitational Radiation by Ultrarelativistic Bodies

1974 ◽  
Vol 64 ◽  
pp. 60-60
Author(s):  
Peter Jocelyn Westervelt
Keyword(s):  
General Relativity ◽  
Gravitational Waves ◽  
Direct Observation ◽  
Gravitational Radiation ◽  
Indirect Evidence ◽  
Forward Direction ◽  
Recent Analysis ◽  
Circular Orbits ◽  
Low Efficiency

I have shown (Westervelt, 1966) that ultrarelativistic bodies do not radiate gravitational waves in the forward direction. This work has been extended so as to apply to circular orbits. Even if low efficiency of generation precludes direct observation of gravitational waves, indirect evidence for their existence is available in a recent analysis (Westervelt, 1969) of Shapiro's fourth test of general relativity.

scholarly journals Mechanisms for the Emission and Absorbtion of Gravitational Radiation

1974 ◽  
Vol 64 ◽  
pp. 3-15 ◽  
Author(s):  
Charles W. Misner
Keyword(s):  
Synchrotron Radiation ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Gravitational Radiation ◽  
First Principles ◽  
Theoretical Studies ◽  
New Techniques ◽  
Critical Reviews

Following some introductory comments on the fundamentals or first principles governing jointly the emission and absorption of gravitational waves, a list is given of observational targets or goals for gravitational wave astronomy which have been selected from recent critical reviews. Then theoretical studies of plunge radiation and gravitational synchrotron radiation are surveyed, since in this area new techniques are developing rapidly although new observational prospects have not yet been found.

scholarly journals TRAPPING OF NONLINEAR GRAVITATIONAL WAVES BY TWO-FLUID SYSTEMS

2009 ◽  
Vol 24 (34) ◽  
pp. 2761-2768 ◽  
Author(s):  
MERAB GOGBERASHVILI ◽  
RAMAZ KHOMERIKI
Keyword(s):  
Energy Transfer ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Electromagnetic Waves ◽  
Wave Amplitude ◽  
Vacuum Energy ◽  
Matter Wave ◽  
Stiff Matter ◽  
Fluid Systems ◽  
Two Fluid

We show that the coupled two-fluid gravitating system (e.g. stiff matter and "vacuum energy") could trap nonlinear gravitational waves (e.g. Einstein–Rosen waves). The gravitational wave amplitude varies harmonically in time transferring the energy coherently to the stiff matter wave, and then the process goes to the backward direction. This process mimics the behavior of trapped electromagnetic waves in two-level media. We have defined the limits for the frequency of this energy transfer oscillations.

scholarly journals Low Frequency Gravitational Waves in Cosmology

1974 ◽  
Vol 63 ◽  
pp. 299-315
Author(s):  
G. Dautcourt
Keyword(s):  
Gravitational Waves ◽  
Gravitational Radiation ◽  
Low Frequency ◽  
Wave Band ◽  
Thermal Background

An intense non-thermal background of cosmic gravitational radiation in the Megaparsec wave band could be detected by its influence on many astrophysical processes. In particular, it may give an explanation of the so-called redshift anomalies.

Spherical gravitational waves

1959 ◽  
Vol 251 (994) ◽  
pp. 233-271 ◽  
Keyword(s):  
General Relativity ◽  
Gravitational Waves ◽  
Large Class ◽  
Linear Approximation ◽  
Gravitational Radiation ◽  
Gravitational Mass ◽  
Field Equations ◽  
Spherical Waves ◽  
Non Linear ◽  
External Forces

The field of gravitational radiation emitted from two moving particles is investigated by means of general relativity. A method of approximation is used, and in the linear approximation retarded potentials corresponding to spherical gravitational waves are introduced. As is already known, the theory in this approximation predicts that energy is lost by the system. The field equations in the second, non-linear, approximation are then considered, and it is shown that the system loses an amount of gravitational mass precisely equal to the energy carried away by the spherical waves of the linear approximation. The result is established for a large class of particle motions, but it has not been possible to determine whether energy is lost in free gravitational motion under no external forces. The main conclusion of this work is that, contrary to opinions frequently expressed, gravitational radiation has a real physical existence, and in particular, carries energy away from the sources.

Sign in / Sign up

Export Citation Format

Share Document