Primordial power spectrum features and consequences

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود 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

A new search for features in the primordial power spectrum

We develop a new approach toward a high resolution non-parametric reconstruction of the primordial power spectrum using WMAP cosmic microwave background temperature anisotropies that we confront with SDSS large-scale structure data in the range k ∼ 0.01 − 0.1 hMpc. We utilise the standard ΛCDM cosmological model but we allow the baryon fraction to vary. In particular, for the concordance baryon...

متن کامل

Reconstructing the primordial power spectrum

We reconstruct the shape of the primordial power spectrum from the latest cosmic microwave background data, including the new results from the Wilkinson Microwave Anisotropy Probe (WMAP), and large scale structure data from the two degree field galaxy redshift survey (2dFGRS). We tested four parameterizations taking into account the uncertainties in four cosmological parameters. First we parame...

متن کامل

Reconstructing the Primordial Power Spectrum

The combination of Cosmic Microwave Background (CMB) anisotropy measurements and Large-Scale Structure observations has caused dissatisfaction with the standard Cold Dark Matter (sCDM) cosmogony, leading some to advocate a “tilt” of the primordial power spectrum away from scale-invariant (n = 1) to n = 0.8− 0.9. 1 Other CDM cosmogonies have not commonly been tilted but their agreement with the ...

متن کامل

WMAP 3 - year primordial power spectrum

We constrain the form of the primordial power spectrum using Wilkinson Microwave Anisotropy Probe (WMAP) 3-year cosmic microwave background (CMB) data in addition to complementary large-scale structure (LSS) data. We extend the work of the WMAP team (Spergel et al. 2006) to that of a fully Bayesian approach whereby we compute the comparative Bayesian evidence in addition to parameter estimates ...

متن کامل

Features in the primordial power spectrum of double D-term inflation

Recently, there has been some interest for building supersymmetric models of double inflation. These models, realistic from a particle physics point of view, predict a broken-scale-invariant power spectrum of primordial cosmological perturbations, that may explain eventual non-trivial features in the present matter power spectrum. In previous works, the primordial spectrum was calculated using ...

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: Journal of Physics: Conference Series

سال: 2014

ISSN: 1742-6596

DOI: 10.1088/1742-6596/484/1/012058