356 citations · 1.7k across the 14 of their papers we have counts for
14 papers
Hints for possible low redshift oscillation around the best fit CDM model in the expansion history of the Universe
L. Kazantzidis, H. Koo, S. Nesseris +2
We search for possible deviations from the expectations of the concordance CDM model in the expansion history of the Universe by analysing the Pantheon Type Ia Supernovae (SnIa)…
Tension and constraints on modified gravity parametrizations of from growth rate and Planck data
Savvas Nesseris, George Pantazis, Leandros Perivolaropoulos
We construct an updated and extended compilation of growth rate data consisting of 34 points and including corrections for model dependence. In order to maximize the independence o…
A Comparison of Thawing and Freezing Dark Energy Parametrizations
G. Pantazis, S. Nesseris, L. Perivolaropoulos
Dark energy equation of state parametrizations with two parameters and given monotonicity are generically either convex or concave functions. This makes them suitable for fi…
Observational constraints on viable f(R) parametrizations with geometrical and dynamical probes
Spyros Basilakos, Savvas Nesseris, Leandros Perivolaropoulos
We demonstrate that a wide range of viable f(R) parameterizations (including the Hu & Sawicki and the Starobinsky models) can be expressed as perturbations deviating from the LCDM…
Comparison of Recent SnIa datasets
J. C. Bueno Sanchez, S. Nesseris, L. Perivolaropoulos
We rank the six latest Type Ia supernova (SnIa) datasets (Constitution (C), Union (U), ESSENCE (Davis) (E), Gold06 (G), SNLS 1yr (S) and SDSS-II (D)) in the context of the Chevalie…
Is the CMB shift parameter connected with the growth of cosmological perturbations?
S. Basilakos, S. Nesseris, L. Perivolaropoulos
We verify numerically that in the context of general relativity (GR), flat models which have the same and CMB shift parameter but different and also h…