The injection of secondary particles produced by dark annihilation around redshift ∼ 1000 would inevitably affect the process of recombination, leaving an imprint on cosmic microwave background (CMB) temperature and polarization anisotropies. We show that the most recent CMB measurements provided by the WMAP satellite mission and the ACT telescope place interesting constraints on DM self-annihi...

Abstract We present a new, model-independent approach for measuring non-Gaussianity of the Cosmic Microwave Background (CMB) anisotropy pattern. Our approach is based on the empirical distribution function of the normalized spherical harmonic expansion coefficients alm of a nearly full-sky CMB map, like the ones expected from forthcoming satellite experiments. Using a set of Kolmogorov-Smirnov ...

We review the ability of redshift surveys to provide constraints on the Dark Energy content of the Universe. The matter power spectrum and dynamics at the present epoch are nearly ‘blind’ to Dark Energy, but combined with the CMB they can provide a constraint on the Equation of State parameter w. A representative result from the 2dF galaxy redshift survey combined with the CMB is w < −0.52 (95%...

One of the most powerful tools to probe the existence of cosmic defects in the early universe is through the Cosmic Microwave Background (CMB) radiation. It is well known that computations with causal sources are more involved than the adiabatic counterparts based on inflation, and this fact has in part hampered the development of fine detailed predictions. Analytical modeling, while necessaril...

I present a series of diagrams which illustrate why the cosmic microwave background (CMB) data favor certain values for the cosmological parameters. Various methods to extract these parameters from CMB and non-CMB observations are forming an ever-tightening network of interlocking constraints. I review the increasingly precise constraints in the Ωm−ΩΛ plane and show why more cosmologists now pr...

INTRODUCTION Cerebral microbleed (CMB) is a potent risk factor for overt cerebrovascular disease. Although some studies indicated the possible role of renal dysfunction as a risk factor of CMB, the findings could not be generalized. This study aimed to investigate the association between renal dysfunction and cerebral microbleed (CMB) in neurologically healthy adults. MATERIALS AND METHODS A ...

BACKGROUND AND PURPOSE Cerebral microbleeds (CMB) attributable to cerebral amyloid angiopathy generally occur in lobar regions, whereas those attributable to hypertensive vasculopathy are deep. Inflammation may be an underlying mechanism for CMB, with varying associations according to CMB location. Lipoprotein phospholipase-A2 (Lp-PLA2) is a circulating enzyme marker of vascular inflammation as...

Research on the cosmic microwave background (CMB) is progressing rapidly. New experimental groups are popping up and two new satellites will be launched. The current enthusiasm to measure fluctuations in the CMB power spectrum at angular scales between 0 • .1 and 1 • is largely motivated by the expectation that CMB determinations of cosmological parameters will be of unprecedented precision: co...

We present a fast computer code based on a simple algorithm for simulating realistic 2D distributions of clustered extragalactic point sources (EPS) in flat patches of the sky as well as in the whole sky. By this method we are able to provide new predictions on the angular power spectrum of cosmic microwave background (CMB) fluctuations due to undetected EPS which improve on previous ones. Both...

We present predictions on the angular power spectrum of cosmic microwave background (CMB) fluctuations due to extragalactic point sources (EPS) by using a method for simulating realistic 2D distributions of clustered EPS. Both radio and far–IR selected source populations are taken into account. To analyze different clustering scenarios, we exploit angular power spectra of EPS, P (k), estimated ...