TY - JOUR
T1 - 'Swiss-cheese' inhomogeneous cosmology and the dark energy problem
AU - Biswas, Tirthabir
AU - Notari, Alessio
PY - 2008/6/1
Y1 - 2008/6/1
N2 - We study an exact Swiss-cheese model of the universe, where inhomogeneous LTB patches are embedded in a flat FLRW background, in order to see how observations of distant sources are affected. We focus mainly on the redshift, both perturbatively and non-perturbatively: the net effect given by one patch is suppressed by (L/R H) 3 (where L is the size of one patch and R H is the Hubble radius). We disentangle this effect from the Doppler term (which is much larger and has been used recently (Biswas et al 2007 J.Cosmol.Astropart. Phys. JCAP12(2007)017 [astro-ph/0606703]) to try to fit the SN curve without dark energy) by making contact with cosmological perturbation theory. Then, the correction to the angular distance is discussed analytically and estimated to be larger, , perturbatively and non-perturbatively (although it should go to zero after angular averaging).
AB - We study an exact Swiss-cheese model of the universe, where inhomogeneous LTB patches are embedded in a flat FLRW background, in order to see how observations of distant sources are affected. We focus mainly on the redshift, both perturbatively and non-perturbatively: the net effect given by one patch is suppressed by (L/R H) 3 (where L is the size of one patch and R H is the Hubble radius). We disentangle this effect from the Doppler term (which is much larger and has been used recently (Biswas et al 2007 J.Cosmol.Astropart. Phys. JCAP12(2007)017 [astro-ph/0606703]) to try to fit the SN curve without dark energy) by making contact with cosmological perturbation theory. Then, the correction to the angular distance is discussed analytically and estimated to be larger, , perturbatively and non-perturbatively (although it should go to zero after angular averaging).
KW - Dark energy theory
KW - Superclusters and voids
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U2 - 10.1088/1475-7516/2008/06/021
DO - 10.1088/1475-7516/2008/06/021
M3 - Article
AN - SCOPUS:47249099364
SN - 1475-7516
VL - 2008
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
IS - 6
M1 - 021
ER -