Browsing Astronomy and Astrophysics by Title
Now showing items 19-38 of 195
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Compact conformal manifolds
(2015-01-21) -
A conjectured bound on accidental symmetries
(2012-01) -
Constraints on the Variation of G from Primordial Nucleosynthesis
We study here the effect of a varying G on the evolution of the early Universe and, in particular, on primordial nucleosynthesis. This variation of G is modelled using the Brans-Dicke theory as well as a more general class ... -
Cosmologies with Energy Exchange
We provide a simple mathematical description of the exchange of energy between two fluids in an expanding Friedmann universe with zero spatial curvature. The evolution can be reduced to a single non-linear differential ... -
Cosmology Without Averaging
We construct cosmological models consisting of large numbers of identical, regularly spaced masses. These models do not rely on any averaging procedures, or on the existence of a global Friedmann-Robertson-Walker (FRW) ... -
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)