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- W2018898875 abstract "Recent analysis of the combined data of cosmic microwave background, galaxy clustering and supernovae type Ia observations have set strong constraints on the equation of state parameter wX. The upper bound wX<−0.82 at 95% c.l. rules out an important class of models, the domain walls (−2/3<wX<−1/3). Here we revisit the issue of domain walls as a possible alternative to the standard Λ-CDM model by questioning the assumptions made in the choice of priors of the data analysis. The results of our investigation show that domain walls can provide a good fit to the WMAP data for a different choice of priors with “lower” values of the Hubble parameter (h<0.65), (as indicated by Sunyaev–Zeldovich and time delays for gravitational lensing observations), and “higher” values of the matter density (Ωm>0.35), (in agreement with recent measurements of the temperature–luminosity relation of distant clusters observed with the XMM-Newton satellite). In this new perspective, the existence of domain walls would lead to important implications for CMB constraints on cosmological and on inflationary parameters." @default.
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- W2018898875 date "2004-07-01" @default.
- W2018898875 modified "2023-09-28" @default.
- W2018898875 title "Are domain walls ruled out?" @default.
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- W2018898875 doi "https://doi.org/10.1016/j.astropartphys.2004.02.006" @default.
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