Clues to the shape of our Universe can be found by searching the CMB for matching circles of temperature patterns. A full sky search of the CMB, mapped extremely accurately by NASA’s WMAP satellite, returned no detection of such matching circles and placed a lower bound on the size of the Universe at 24 Gpc. This lower bound can be extended by optimally filtering the WMAP power spectrum. More s...

Geometrical and statistical properties of polarization of CMB are analyzed. Singular points of the vector field which describes CMB polarization are found and classified. Statistical distribution of the singularities is studied. A possible signature of tensor perturbations in CMB polarization is discussed. For a further analysis of CMB statistics Minkowski functionals are used, which present a ...

Axion-CMB scenario is an interesting possibility to explain the temperature anisotropy of cosmic microwave background (CMB) by primordial fluctuations QCD axion \cite{Iso:2020pzv}. In this scenario, radiations are generated energy exchange between axions and radiations, which results in correlation CMB anisotropies. Consequently, cosmological observations stringently constrain a model early his...

We use Bayesian hierarchical models and recent results from the theory of minimax confidence interval estimation to study the effect of prior information in a cosmological inverse problem. We consider the effect of prior information on uncertainty estimates of a linear functional Lx of an infinite-dimensional model x, given noisy observations y = Kx+x. The model represents the cosmic microwave ...

We explore the possibility that the rest frames of CMB, matter and dark energy differ one from another, i.e. they do not converge on very large scales. In such a case, the usual interpretation of the CMB dipole as being due to the relative motion of the observer with respect to the CMB rest frame is not appropriate. Instead, we find that the measured dipole is due to the observer motion relativ...

We describe our methodology for comparing the WMAP measurements of the cosmic microwave background (CMB) and other complementary data sets to theoretical models. The unprecedented quality of the WMAP data, and the tight constraints on cosmological parameters that are derived, require a rigorous analysis so that the approximations made in the modeling do not lead to significant biases. We descri...

A review of the spatially flat cosmological model SU(2)CMB, minimally induced by postulate that cosmic microwave background (CMB) is subject to an SU(2) rather than a U(1) gauge principle, given. Cosmological parameter values, which are determined from Planck CMB power spectra at small angular scales, compared their values in ΛCDM both local and global extractions. As SU(2)CMB leans toward cosm...

BACKGROUND AND PURPOSE Prevalence of cerebral microbleeds (CMB) in white and Asian populations range from 4% to 15%. However, there is no information from indigenous Latin American people. We aimed to assess prevalence and cerebrovascular correlates of CMB in stroke-free older adults living in rural Ecuador. METHODS Of 311 Atahualpa residents aged ≥60 years identified during a door-to-door su...