Browsing Astronomy and Astrophysics by Title
Now showing items 31-50 of 195
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Decaying Gravity
We consider the possibility of energy being exchanged between the scalar and matter fields in scalar-tensor theories of gravity. Such an exchange provides a new mechanism which can drive variations in the gravitational ... -
Diagnosing shock temperature with NH 3 and H 2 O profiles
(Oxford University Press (OUP), 2016-10-21) -
Dodging the dark matter degeneracy while determining the dynamics of dark energy
(IOP Publishing, 2016-05-03) -
DYNAMICS OF CO IN AMORPHOUS WATER-ICE ENVIRONMENTS
(2014-01-20) -
Errors in Estimating Omega_Lambda due to the Fluid Approximation
The matter content of the Universe is strongly inhomogeneous on small scales. Motivated by this fact, we consider a model of the Universe that has regularly spaced discrete masses, rather than a continuous fluid. The optical ... -
Exact cosmological solutions of scale-invariant gravity theories
We have found new anisotropic vacuum solutions for the scale-invariant gravity theories which generalise Einstein's general relativity to a theory derived from the Lagrangian $R^{1+\delta}$. These solutions are expanding ... -
Exact Evolution of Discrete Relativistic Cosmological Models
(2013-09-11)We study the effects of inhomogeneities on the evolution of the Universe, by considering a range of cosmological models with discretized matter content. This is done using exact and fully relativistic methods that exploit ... -
Exact Friedmann Solutions in Higher-Order Gravity Theories
We find the general behaviour of homogeneous and isotropic cosmological models in some fourth-order theories of gravity. Explicit, exact, general solutions are given for both empty universes and those filled with a perfect ... -
The Existence of Godel, Einstein and de Sitter Universes
We determine the general conditions for the existence of Godel, Einstein static, and de Sitter universes in gravity theories derived from a Lagrangian that is an arbitrary function of the scalar curvature and Ricci and ... -
Exotic branes in string theory
(2013-11-20) -
Explosive Particle Dispersion in Plasma Turbulence
(2016-08-24)