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Could dark energy be changing over time? [PDF]

Proc Natl Acad Sci U S A
Mann A.
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Black Holes as Laboratories: Tests of General Relativity. [PDF]

Gen Relativ Gravit
Gregory R, Nissanke S.
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Modulational instability and associated multiple dark solitons in relativistically degenerate electron-positron-ion plasmas. [PDF]

Sci Rep
Jahangir R, Masood W, Siddiq M, Batool N, Ullah S, Al-Ghamdi H, Tiofack CGL, El-Tantawy SA.   +7 more
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Gravitational Waves and Gravitational-wave Sourcestwo

Chinese Astronomy and Astrophysics, 2018
Abstract The recent discovery of gravitational-wave burst GW150914 marks the coming of a new era of gravitational-wave astronomy, which provides a new window to study the physics of strong gravitational field, extremely massive stars, extremely high energy processes, and extremely early universe.
Zhao Wen, Zhang Xing, Liu Xiao-jin, Zhang Yang, Wang Yun-yong, Zhang Fan, Zhao Yu-hang, Guo Yue-fan, Chen Yi-kang, Ai Shun-ke, Zhu Zong-hong, Wang Xiao-ge, Lebigot Eric, Du Zhi-hui, Cao Jun-wei, Qian Jin, Yin Cong, Wang Jian-bo, Blair David, Ju Li, Zhao Chun-nong, Wen Lin-qing   +21 more
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Gravitational Waves and Gravitational Wave Detectors

2020
Just over 100 years ago, Albert Einstein published his General Theory of Relativity, which describes the interaction between matter, energy, space, and time and explains that the force of gravity is a result of the curvature of space and time (Einstein in Die feldgleichungen der gravitation. Preussische Akademie der Wissenschaften, Sitzungsberichte, pp
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Gravitational wave observatory

Applied Optics, 1990
This brief report from NSF discusses the Foundation's hope to construct a gravitational wave observatory and provide a long-sought test for Einstein's theory of relativity.
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Spherical Gravitational Waves

Physical Review, 1959
The field equations of the general theory of relativity are solved in the linear approximation for all cases of spherical waves with quadrupole symmetry. Energy is radiated outward by all these waves as determined by the canonical expression for the energy flux.
Boardman, John, Bergmann, Peter G.
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Gravitational Wave Astronomy

Annalen der Physik, 2000
AbstractGravitational waves, as predicted by the theory of General Relativity, have been studied theoretically for many decades. However, due to the weak coupling of gravitation with matter, it has not yet been possible to measure them directly. Up to now, we only have indirect evidence of the existence and the effect of gravitational radiation by ...
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GRAVITATIONAL WAVES AND CAUSALITY

Reviews in Mathematical Physics, 1992
A strictly ordered hierarchy of eight causal properties encountered in General Relativity is reviewed for the explicit case of the gravitational plane waves. Illustrative proofs are given to the effect that the place of these space-times is precisely known in the hierarchy: they are causally continuous, but not causally simple. The other conditions of
Ehrlich, Paul E., Emch, Gerard G.
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