Author： Balek Vladimír Škovran Matej
Publisher： IOP Publishing
E-ISSN： 1361-6382|32|1|15015-15035
ISSN： 0264-9381
Source： Classical and Quantum Gravity, Vol.32, Iss.1, 2015-01, pp. : 15015-15035
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Abstract
We compute the power in the lowest multipoles of CMB anisotropies in the presence of a radiation-like solid, a hypothetical new kind of radiation with nonzero shear modulus. If only the ordinary Sachs–Wolfe effect is taken into account, the shear modulus to energy density ratio must be in an absolute value of order 10−5 or less for the theory to be consistent with observations within cosmic variance. With the integrated Sachs–Wolfe effect switched on, the constraint is relaxed by almost two orders of magnitude.
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