Gravitational waves in an algebraically extended theory of gravity

1985 ◽  
Vol 31 (10) ◽  
pp. 2488-2496 ◽  
Author(s):  
R. B. Mann ◽  
J. W. Moffat
Keyword(s):  
Gravitational Waves ◽  
Extended Theory ◽  
Theory Of Gravity

scholarly journals What are the wild waves saying? Yet another meditation on the predictions, searches for, and detections of gravitational waves

2018 ◽  
Vol 27 (14) ◽  
pp. 1830009
Author(s):  
Virginia Trimble
Keyword(s):  
General Relativity ◽  
Gravitational Waves ◽  
Point Of View ◽  
Large Majority ◽  
Laboratory Apparatus ◽  
New Information ◽  
Theory Of Gravity ◽  
To Come ◽  
The Universe

A large majority of the physics and astronomy communities are now sure that gravitational waves exist, can be looked for, and can be studied via their effects on laboratory apparatus as well as on astronomical objects. So far, everything found out has agreed with the predictions of general relativity, but hopes are high for new information about the universe and its contents and perhaps for hints of a better theory of gravity than general relativity (which even Einstein expected to come eventually). This is one version of the story, from 1905 to the present, told from an unusual point of view, because the author was, for 28.5 years, married to Joseph Weber, who built the first detectors starting in the early 1960s and operated one or more until his death on 30 September 2000.

scholarly journals The YARK Theory of Gravity Can Reproduce Neither the LIGO “GW150914 Signal”, nor the Other LIGO Detections of Gravitational Waves

Symmetry ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 558 ◽  
Author(s):  
Christian Corda
Keyword(s):  
Gravitational Waves ◽  
The Other ◽  
Theory Of Gravity ◽  
Recent Claim

We show that, based on important reasons, differently from some recent claim in the literature, the YARK theory of gravity can reproduce neither the LIGO “GW150914 signal”, nor the other LIGO detections of gravitational waves (GWs).

Detection of massive Gravitational Waves using spherical antenna

2014 ◽  
Vol 23 (05) ◽  
pp. 1450037 ◽  
Author(s):  
P. Prasia ◽  
V. C. Kuriakose
Keyword(s):  
Gravitational Wave ◽  
Gravitational Waves ◽  
Mechanical Resonators ◽  
Spherical Antenna ◽  
Wave Antenna ◽  
Gravitational Wave Antenna ◽  
Theory Of Gravity

The generation of massive Gravitational Waves (GW) from metric f(R) theory of gravity is studied and the sensitivity of a spherical antenna detector towards such a wave is looked into. The energy sensitivity is maximum for the monopole mode of the sphere. Of the five quadrupole modes of a sphere, only three are triggered by a massive wave. Also, the sensitivity of a spherical antenna with mechanical resonators attached to it is studied. The Truncated Icosahedral Gravitational wave Antenna (TIGA), originally proposed for detecting the effect of massless GW on the quadrupole modes of a sphere, has been modified in this paper to get a Modified TIGA, in order to detect the sensitivity of monopole modes towards a massive wave.

scholarly journals Gravitational waves in the relativistic theory of gravity

2009 ◽  
Vol 160 (2) ◽  
pp. 1096-1100 ◽  
Author(s):  
S. S. Gershtein ◽  
A. A. Logunov ◽  
M. A. Mestvirishvili
Keyword(s):  
Gravitational Waves ◽  
Relativistic Theory ◽  
Relativistic Theory Of Gravity ◽  
Theory Of Gravity

scholarly journals Gravitational waves in the spinor theory of gravity

2020 ◽  
pp. 2150003
Author(s):  
M. Novello ◽  
A. E. S. Hartmann
Keyword(s):  
General Relativity ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Spinor Theory ◽  
Ricci Flat ◽  
Theory Of Gravity

We analyze the gravitational waves within the Spinor Theory of Gravity (STG) and compare it with the General Relativity proposal. In the case of STG, a gravitational wave may occur if the effective gravitational metric induced by the spinorial field is Ricci flat.

scholarly journals Investigating $f(R)$ gravity and cosmologies

2021 ◽  
Author(s):  
Vaibhav Kalvakota
Keyword(s):  
General Relativity ◽  
Lagrangian Density ◽  
Ricci Scalar ◽  
Metric Tensor ◽  
Extended Theory ◽  
Theories Of Gravity ◽  
Theory Of Gravity ◽  
Hilbert Action ◽  
Geometric Nature

The f (R) theory of gravity is an extended theory of gravity that is based on general relativity in the simplest case of $f(R) = R$. This theory extends such a function of the Ricci scalar into arbitrary functions that are not necessarily linear, i.e. could be of the form $f(R) = \alpha R^{2}$. The action for such a theory would be $S_{EH} = \frac{1}{2k} \int f(R) + L^{m}\; d^{4}x\sqrt{−g}$, where $S_{EH}$ is the Einstein-Hilbert action for our theory, $g$ is the determinant of the metric tensor $g_{\mu \nu}$ and $L^{m}$ is the Lagrangian density for matter. In this paper, we will look at some of the physical implications of such a theory, and the importance of such a theory in cosmology and in understanding the geometric nature of such f (R) theories of gravity.

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