Median statistics cosmological parameter values

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Genus statistics on CMB polarization maps and cosmological parameter degeneracy

We apply genus statistics to simulated CMB polarization maps, constructed from secondary-ionization cosmological models in experimental situations comparable to those of forthcoming space experiments. We find that both the cosmic baryon density and the spectral index of density perturbations are strongly anticorrelated to the reionization redshift. Using the Fisher matrix approach we show that ...

متن کامل

Statistics of Cosmological Inhomogeneities

This contribution to the Proceedings is based on the talk given at the Conference on Birth of the Universe and Fundamental Physics, Rome, May 18-21, 1994. Some selected topics of the subject are reviewed: Models of Primordial Fluctuations; Reconstruction of the Cosmological Density Probability Distribution Function (PDF) from Cumulants; PDFs in the Zel’dovich Approximation and from Summarizing ...

متن کامل

Testing Cosmological Models and Understanding Cosmological Parameter Determinations with Metaparameters

Cosmological parameters affect observables in physically distinct ways. For example, the baryon density, ωb, affects the ionization history and also the pressure of the pre-recombination fluid. To investigate the relative importance of different physical effects to the determination of ωb, and to test the cosmological model, we artificially split ωb into two ‘metaparameters’: ωbe which controls...

متن کامل

Compressive parameter estimation via K-median clustering

In recent years, compressive sensing (CS) has attracted significant attention in parameter estimation tasks, including frequency estimation, time delay estimation, and localization. In order to use CS in parameter estimation, parametric dictionaries (PDs) collect observations for a sampling of the parameter space and yield sparse representations for signals of interest when the sampling is suff...

متن کامل

Giant Arc Statistics and Cosmological Parameters

We study with semi-analytical methods the statistics of pronounced arcs caused by lensing of galaxies by foreground galaxy clusters. For the number density and redshift distribution of rich clusters we use Press-Schechter theory, normalized on the basis of empirical data. For the background sources we make use of observational results in the Hubble Deep Field. We present results for three diffe...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Physics Letters B

سال: 2014

ISSN: 0370-2693

DOI: 10.1016/j.physletb.2014.03.059