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Cosmological parameter estimation and the spectral index from inflation
Edmund J Copeland, Ian J Grivell, Andrew R Liddle
Accurate estimation of cosmological parameters from microwave background anisotropies requires high-accuracy understanding of the cosmological model. Normally, a power-law spectrum…
Exponential potentials and cosmological scaling solutions
Edmund J Copeland, Andrew R Liddle, David Wands
We present a phase-plane analysis of cosmologies containing a barotropic fluid with equation of state , plus a scalar field with an exponential potential $V \pr…
Primordial black holes and early cosmology
Andrew R Liddle, Anne M Green
We describe the changes to the standard primordial black hole constraints on density perturbations if there are modifications to the standard cosmology between the time of formatio…
Gravitational memory of boson stars
Diego F Torres, Andrew R Liddle, Franz E Schunck
`Gravitational memory' refers to the possibility that, in cosmologies with a time-varying gravitational `constant', objects such as black holes may retain a memory of conditions at…
Perturbation evolution in cosmologies with a decaying cosmological constant
Pedro T P Viana, Andrew R Liddle
Structure formation models with a cosmological constant are successful in explaining large-scale structure data, but are threatened by the magnitude-redshift relation for Type Ia s…
Primordial black hole constraints in cosmologies with early matter domination
Anne M Green, Andrew R Liddle, Antonio Riotto
Moduli fields, a natural prediction of any supergravity and superstring-inspired supersymmetry theory, may lead to a prolonged period of matter domination in the early Universe. Th…