output
19922026
Showing 2014 · astro-ph.COShow all

9 papers · 2 filters

astro-ph.CO2014★ 2 cited

Probing gravity with PLANCK data on cluster pressure profiles

I. De Martino, M. De Laurentis, F. Atrio-Barandela +1

Analytical -gravity models introduce Yukawa-like corrections to the Newtonian potential in the weak field limit. These models can explain the dynamics of galaxies and cluster…

astro-ph.CO2014★ 5 cited

Mass - concentration relation and weak lensing peak counts

V. F. Cardone, S. Camera, M. Sereno +3

The statistics of peaks in weak lensing convergence maps is a promising tool to investigate both the properties of dark matter haloes and constrain the cosmological parameters. We…

astro-ph.CO2014★ 55 cited

Unveiling secret interactions among sterile neutrinos with big-bang nucleosynthesis

Ninetta Saviano, Ofelia Pisanti, Gianpiero Mangano +1

Short-baseline neutrino anomalies suggest the existence of low-mass ( m \sim O(1)~eV) sterile neutrinos ν_s. These would be efficiently produced in the early universe by oscillatio…

astro-ph.CO2014★ 119 cited

Strongest model-independent bound on the lifetime of Dark Matter

Benjamin Audren, Julien Lesgourgues, Gianpiero Mangano +2

Dark Matter is essential for structure formation in the late Universe so it must be stable on cosmological time scales. But how stable exactly? Only assuming decays into relativist…

astro-ph.CO2014★ 48 cited

Probing nuclear rates with Planck and BICEP2

Eleonora Di Valentino, Carlo Gustavino, Julien Lesgourgues +4

Big Bang Nucleosynthesis (BBN) relates key cosmological parameters to the primordial abundance of light elements. In this paper, we point out that the recent observations of Cosmic…

astro-ph.CO2014★ 47 cited

A Free-Form Lensing Grid Solution for A1689 with New Mutiple Images

Jose M. Diego, T. Broadhurst, N. Benitez +6

Hubble Space Telescope imaging of the galaxy cluster Abell 1689 has revealed an exceptional number of strongly lensed multiply-imaged galaxies, including high-redshift candidates.…

astro-ph.CO2014★ 53 cited

Scalar-Tensor Gravity Cosmology: Noether symmetries and analytical solutions

A. Paliathanasis, M. Tsamparlis, S. Basilakos +1

In this paper, we present a complete Noether Symmetry analysis in the framework of scalar-tensor cosmology. Specifically, we consider a non-minimally coupled scalar field action em…

astro-ph.CO2014★ 70 cited

Non-parametric study of the evolution of the cosmological equation of state with SNeIa, BAO and high redshift GRBs

Sergey Postnikov, Maria Giovanna Dainotti, Xavier Hernandez +1

We study the dark energy equation of state as a function of redshift in a non-parametric way, without imposing any {\it a priori} (ratio of pressure over energy density) fun…

astro-ph.CO2014★ 57 cited

Measurement of the halo bias from stacked shear profiles of galaxy clusters

Giovanni Covone, Mauro Sereno, Martin Kilbinger +1

We present the observational evidence of the 2-halo term in the stacked shear profile of a sample of about 1200 optically selected galaxy clusters based on imaging data and the pub…