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Is there Correlation between Fine Structure and Dark Energy Cosmic Dipoles
We present a detailed analysis (including redshift tomography) of the cosmic dipoles in the Keck+VLT quasar absorber and in the Union2 SnIa samples. We show that the fine structure constant cosmic
Searching for a Cosmological Preferred Axis: Union2 Data Analysis and Comparison with Other Probes
We review, compare and extend recent studies searching for evidence for a preferred cosmological axis. We start from the Union2 SnIa dataset and use the hemisphere comparison method to search for a
COBE versus cosmic strings. An analytical model
Abstract We construct a simple analytical model to study the effects of cosmic strings on the microwave background radiation. Our model is based on counting random multiple impulses inflicted on
PPN Parameter $\gamma$ and Solar System Constraints of Massive Brans-Dicke Theories
Previous solar system constraints of the Brans-Dicke (BD) parameter $\ensuremath{\omega}$ have either ignored the effects of the scalar field potential (mass terms) or assumed a highly massive scalar
Submillimeter spatial oscillations of Newton’s constant: Theoretical models and laboratory tests
We investigate the viability of sub-millimeter wavelength oscillating deviations from the Newtonian potential at both the theoretical and the experimental/observational level. At the theoretical
Large Scale Cosmological Anomalies and Inhomogeneous Dark Energy
A wide range of large scale observations hint towards possible modifications on the standard cosmological model which is based on a homogeneous and isotropic universe with a small cosmological
Tension and constraints on modified gravity parametrizations of $G_{\textrm{eff}}(z)$ from growth rate and Planck data
We construct an updated and extended compilation of growth-rate data based on recent redshift-space distortion measurements. The data set consists of 34 data points and includes corrections for model
A Comparison of cosmological models using recent supernova data
We study the expansion history of the universe up to a redshift of $\mathrm{z}=1.75$ using the 194 recently published SnIa data by Tonry et al. and Barris et al. In particular we find the best fit
Crossing the phantom divide: theoretical implications and observational status
If the dark energy equation of state parameter w(z) crosses the phantom divide line w = −1 (or equivalently if the expression d(H2(z))/dz−3Ω0mH02(1+z)2 changes sign) at recent redshifts, then there
Comparison of the legacy and gold type Ia supernovae dataset constraints on dark energy models
We have performed a comparative analysis of three recent and reliable SnIa datasets available in the literature: the Full Gold (FG) dataset (157 data points 0<z<1.75), a Truncated Gold (TG) dataset