Browsing Astronomy and Astrophysics by Title
Now showing items 14-33 of 195
-
CARMENES Instrument Overview
(2014) -
Codimension-2 solutions in five-dimensional supergravity
(2015-10-02) -
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 ...