72 citations · 89 across the 2 of their papers we have counts for
6 papers
Hubble flow variance and the cosmic rest frame
David L. Wiltshire, Peter R. Smale, Teppo Mattsson +1
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…
On the role of shear in cosmological averaging II: large voids, non-empty voids and a network of different voids
Maria Mattsson, Teppo Mattsson
We study the effect of shear on the cosmological backreaction in the context of matching voids and walls together using the exact inhomogeneous Lemaitre-Tolman-Bondi solution. Gene…
On the role of shear in cosmological averaging
Maria Mattsson, Teppo Mattsson
Using the spherically symmetric inhomogeneous Lemaitre-Tolman-Bondi dust solution, we study how the shear and the backreaction depend on the sharpness of the spatial transition bet…
Dark energy as a mirage
Teppo Mattsson
Motivated by the observed cosmic matter distribution, we present the following conjecture: due to the formation of voids and opaque structures, the average matter density on the pa…
Exploiting scale dependence in cosmological averaging
Teppo Mattsson, Maria Ronkainen
We study the role of scale dependence in the Buchert averaging method, using the flat Lemaitre-Tolman-Bondi model as a testing ground. Within this model, a single averaging scale g…
The effect of inhomogeneous expansion on the supernova observations
Kari Enqvist, Teppo Mattsson
We consider an inhomogeneous but spherically symmetric Lemaitre-Tolman-Bondi model to demonstrate that spatial variations of the expansion rate can have a significant effect on the…