929 citations · 1.3k across the 12 of their papers we have counts for
12 papers
On the homogeneity of SnIa absolute magnitude in the Pantheon+ sample
Leandros Perivolaropoulos, Foteini Skara
We have analysed the Pantheon+ sample using a new likelihood model that replaces the single SnIa absolute magnitude parameter used in the standard likelihood model of Brout et.…
A reanalysis of the latest SH0ES data for : Effects of new degrees of freedom on the Hubble tension
Leandros Perivolaropoulos, Foteini Skara
We reanalyze the recently released SH0ES data for the determination of . We focus on testing the homogeneity of the Cepheid+SnIa sample and the robustness of the results in th…
Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
Elcio Abdalla, Guillermo Franco Abellán, Amin Aboubrahim +200
In this paper we will list a few important goals that need to be addressed in the next decade, also taking into account the current discordances between the different cosmological…
Gravitational transitions via the explicitly broken symmetron screening mechanism
Leandros Perivolaropoulos, Foteini Skara
We generalize the symmetron screening mechanism by allowing for an explicit symmetry breaking of the symmetron potential. A coupling to matter of the form $A(ϕ)=1+\frac{ϕ^2}{…
Hubble tension or a transition of the Cepheid SnIa calibrator parameters?
Leandros Perivolaropoulos, Foteini Skara
We re-analyze the Cepheid data used to infer the value of by calibrating SnIa. We do not enforce a universal value of the empirical Cepheid calibration parameters (Ceph…
Challenges for CDM: An update
Leandros Perivolaropoulos, Foteini Skara
A number of challenges to the standard CDM model have been emerging during the past few years as the accuracy of cosmological observations improves. In this review we discuss in…
Weak gravity on a CDM background
Radouane Gannouji, Leandros Perivolaropoulos, David Polarski +1
We consider Horndeski modified gravity models obeying stability, velocity of gravitational waves equals and quasistatic approximation (QSA) on subhorizon scales. We assum…
Scalar tachyonic instabilities in gravitational backgrounds: Existence and growth rate
L. Perivolaropoulos, F. Skara
It is well known that the Klein Gordon (KG) equation has tachyonic unstable modes on large scales () for in a flat Minkowski…
Tension of the statistic and RSD data with Planck/CDM and implications for weakening gravity
F. Skara, L. Perivolaropoulos
The statistic is a powerful probe for detecting deviations from GR by combining weak lensing (WL), real-space clustering and redshift space distortion (RSD) measurements thus…
Primordial Power Spectra of Cosmological Fluctuations with Generalized Uncertainty Principle and Maximum Length Quantum Mechanics
F. Skara, L. Perivolaropoulos
The existence of the cosmological particle horizon as the maximum measurable length in the universe leads to a generalization of the quantum uncertainty principle (GUP) t…
Reconstructing a Model for Gravity at Large Distances from Dark Matter Density Profiles
L. Perivolaropoulos, F. Skara
Using the Navarro-Frenk-White (NFW) dark matter density profile we reconstruct an effective field theory model for gravity at large distances from a central object by demanding tha…
Constraining power of cosmological observables: blind redshift spots and optimal ranges
L. Kazantzidis, L. Perivolaropoulos, F. Skara
A cosmological observable measured in a range of redshifts can be used as a probe of a set of cosmological parameters. Given the cosmological observable and the cosmological parame…