8 papers · 1 filter
New Physics In Clusters of Galaxy: A New Dark Matter Component ?
Marian Douspis
The latest cosmological observables analyses seem to converge to a concordant view of the cosmological model: namely the power law Lambda-CDM. The recent WMAP results comfort this…
Initial power spectrum shape
Marian Douspis
Mainly used to set constraints on cosmological parameters, CMB anisotropies can give information on primordial universe. Unfortunately, initial conditions and late time cosmology a…
Cosmological Parameter Estimation from CMB and X-ray clusters
M. Douspis, A. Blanchard, R. Sadat +1
We present the results of a combined analysis of cosmic microwave background (CMB) and X-ray galaxy clusters baryon fraction to deduce constraints over 6 in flationnary cosmologica…
The baryon fraction in X-Rays galaxy clusters revisited
R. Sadat, A. Blanchard, M. Douspis
One of the most direct way to constrain the matter density of the universe is to measure the baryon content in X-Rays clusters of galaxies. Typical value of the mean gas mass…
CMB Cosmological Parameter Estimation: Methods and Current Results
M. Douspis, J. G. Bartlett, A. Blanchard +1
The majority of present efforts to constrain cosmological parameters with cosmic microwave background (CMB) anisotropy data employ approximate likelihood functions, the time consum…
Constraints on Cosmological Parameters from Current CMB Data
J. G. Bartlett, A. Blanchard, M. Douspis +1
We discuss the constraints one can place on cosmological parameters using current cosmic microwave background data. A standard --minimization over band--power estimates is fir…