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Is there Correlation between Fine Structure and Dark Energy Cosmic Dipoles

- A. Mariano, L. Perivolaropoulos
- Physics
- 18 June 2012

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… Expand

Searching for a Cosmological Preferred Axis: Union2 Data Analysis and Comparison with Other Probes

- I. Antoniou, L. Perivolaropoulos
- Physics
- 25 July 2010

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… Expand

COBE versus cosmic strings. An analytical model

- L. Perivolaropoulos
- Physics
- 25 August 1992

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… Expand

PPN Parameter $\gamma$ and Solar System Constraints of Massive Brans-Dicke Theories

- L. Perivolaropoulos
- Physics
- 17 November 2009

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… Expand

Submillimeter spatial oscillations of Newton’s constant: Theoretical models and laboratory tests

- L. Perivolaropoulos
- Physics
- 22 November 2016

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… Expand

Large Scale Cosmological Anomalies and Inhomogeneous Dark Energy

- L. Perivolaropoulos
- Physics
- 17 January 2014

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… Expand

Tension and constraints on modified gravity parametrizations of $G_{\textrm{eff}}(z)$ from growth rate and Planck data

- S. Nesseris, G. Pantazis, L. Perivolaropoulos
- Physics
- 30 March 2017

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… Expand

A Comparison of cosmological models using recent supernova data

- S. Nesseris, L. Perivolaropoulos
- Physics
- 26 January 2004

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… Expand

Crossing the phantom divide: theoretical implications and observational status

- S. Nesseris, L. Perivolaropoulos
- Physics, Mathematics
- 4 October 2006

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… Expand

Comparison of the legacy and gold type Ia supernovae dataset constraints on dark energy models

- S. Nesseris, L. Perivolaropoulos
- Physics
- 1 November 2005

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… Expand

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