Szekeres Swiss-Cheese model and supernova observations

Details Szekeres Swiss-Cheese model and supernova observations Szekeres Swiss-Cheese model and supernova observations

2010-05-14

arxiv.org/abs/1005.2584v2

Phys.Rev.D82:103510,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

9 pages, 5 figures, matches published version

Scientific paper

10.1103/PhysRevD.82.103510

We use different particular classes of axially symmetric Szekeres Swiss-cheese models for the study of the apparent dimming of the supernovae of type Ia. We compare the results with those obtained in the corresponding Lemaitre-Tolman Swiss-cheese models. Although the quantitative picture is different the qualitative results are comparable, i.e, one cannot fully explain the dimming of the supernovae using small scale ~50 Mpc inhomogeneities. To fit successfully the data we need structures of order of 500 Mpc size or larger. However, this result might be an artifact due to the use of axial light rays in axially symmetric models. Anyhow, this work is a first step in trying to use Szekeres Swiss-cheese models in cosmology and it will be followed by the study of more physical models with still less symmetry.

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