Browsing Astronomy and Astrophysics by Title
Now showing items 39-58 of 195
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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) -
The F ring of Saturn
(Cambridge University Press, 2018-03-22) -
A far-ultraviolet-driven photoevaporation flow observed in a protoplanetary disk.
(2024-03)Most low-mass stars form in stellar clusters that also contain massive stars, which are sources of far-ultraviolet (FUV) radiation. Theoretical models predict that this FUV radiation produces photodissociation regions ... -
The FIELDS Instrument Suite for Solar Probe Plus
(2016-12) -
First results from high redshift quasar searches in VIKING
(Queen Mary University of London, 2012-06)This thesis presents the discovery of the first luminous z & 6.5 quasars in the VISTA kilo-degree Infrared Galaxy Survey (VIKING). After some basic quality control, quasar selection is investigated via use of initial data ... -
FRW cosmology in Milgrom's bimetric theory of gravity
We consider spatially homogeneous and isotropic Friedmann-Robertson-Walker (FRW) solutions of Milgrom's recently proposed class of bimetric theories of gravity. These theories have two different regimes, corresponding to ... -
Further Exact Cosmological Solutions to Higher-Order Gravity Theories
We investigate the effect of deviations from general relativity on approach to the initial singularity by finding exact cosmological solutions to a wide class of fourth-order gravity theories. We present new anisotropic ...