## Search

Now showing items 1-10 of 15

#### Cosmic microwave background anisotropies in the timescape cosmology

(University of Canterbury. Physics and Astronomy, 2014)

We analyze the spectrum of cosmic microwave background (CMB) anisotropies in the timescape
cosmology: a potentially viable alternative to homogeneous isotropic cosmologies without dark energy.
We exploit the fact that ...

#### Is there proof that backreaction of inhomogeneities is irrelevant in cosmology?

(University of Canterbury. Physics and Astronomy, 2015)

In a number of papers Green and Wald argue that the standard
FLRW model approximates our Universe extremely well on all scales, except close
to strong field astrophysical objects. In particular, they argue that the ...

#### Quasilocal energy and thermodynamic equilibrium conditions

(University of Canterbury. Physics and Astronomy, 2015)

Equilibrium thermodynamic laws are typically applied to horizons in
general relativity without stating the conditions that bring them into equilibrium.
We fill this gap by applying a new thermodynamic interpretation to ...

#### Dark energy from cosmic structure

(University of Canterbury. Physics and Astronomy, 2014)

#### Supernova tests of the timescape cosmology

(University of Canterbury. Physics and Astronomy, 2011)

The timescape cosmology has been proposed as a viable alternative to homogeneous
cosmologies with dark energy. It realises cosmic acceleration as an apparent effect
that arises in calibrating average cosmological parameters ...

#### Gravitational energy as dark energy: Average observational quantities

(University of Canterbury. Physics and Astronomy, 2010)

In the timescape scenario cosmic acceleration is understand as an apparent effect, due to gravitational energy
gradients that grow when spatial curvature gradients become significant with the nonlinear growth of cosmic ...

#### Hubble expansion variance and the cosmic rest frame

(University of Canterbury. Physics and Astronomy, 2014)

Average homogeneity is only reached on scales greater than 70{100h1Mpc yet standard peculiar velocity approaches assume an most Euclidean geometry below this scale. Furthermore, the Friedmann equation
is applied in the ...

#### Hubble flow variance and the cosmic rest frame

(University of Canterbury. Physics and Astronomy, 2013)

We characterize the radial and angular variance of the Hubble flow in the composite sample of 4534 galaxies, on scales in which much of the flow is in the nonlinear regime. With no cosmological assumptions other than the ...

#### Dark energy from cosmic structure

(University of Canterbury. Physics and Astronomy, 2014)

Apparent cosmic acceleration can be understood by
treating geometry of universe more realistically
understanding fundamental aspects of general
relativity which have not been fully explored –
quasi–local gravitational ...

#### Supernova tests of the timescape cosmology

(University of Canterbury. Physics and Astronomy, 2011)

The timescape cosmology has been proposed as a viable alternative to homogeneous
cosmologies with dark energy. It realises cosmic acceleration as an apparent effect
that arises in calibrating average cosmological parameters ...