Dark energy and the CMB cold spot

AI Thread Summary
Recent papers from WISE and 2MASS confirm the existence of a supervoid associated with the Cosmic Microwave Background (CMB) cold spot, suggesting significant implications for dark energy models. The findings may challenge the necessity of dark energy, as discussed in the heavily cited paper that compares local voids with dark energy. The Lemaitre-Tolman-Bondi model is highlighted as a critical aspect of this discussion. The relationship between large voids and dark energy has been a topic of interest in cosmology for over a decade. These developments could reshape current understanding of cosmic structure and dark energy.
Chronos
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Two papers went up today regarding infrared all sky surveys by WISE and 2MASS that affirm the CMB cold spot - http://arxiv.org/abs/1405.1555, A Supervoid Imprinting the Cold Spot in the Cosmic Microwave Background; http://arxiv.org/abs/1405.1566, Detection of a Supervoid Aligned with the Cold Spot of the Cosmic Microwave Background. The effect of large voids on dark energy models has been discussed in the literature for the last decade. Does this lend credence to papers like http://arxiv.org/abs/0712.0370, Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae; a heavily cited paper that questions the need for dark energy?
 
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interesting articles, however I'm not familiar enough with the MV model to draw any connection
 
The Lemaitre-Tolman-Bondi model is a central issue here, IMO.
 
https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
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