299 citations · 837 across the 21 of their papers we have counts for
21 papers
Advanced manifold-metric pairs
Pierros Ntelis
This article presents a novel mathematical formalism for advanced manifold--metric pairs, enhancing the frameworks of geometry and topology. We construct various D-dimensional mani…
Analytical CDM dynamics
Pierros Ntelis, Jackson Levi Said
We develop a novel analytical dynamical analysis to derive precise energy density ratio evolutions for the CDM and CDM models, comparing them to the standard CDM model…
Chaotic motion and power spectral density in Schwarzschild Bertotti-Robinson black hole spacetime
Yunqiao Xu, Uktamjon Uktamov, Pierros Ntelis +3
In this paper, we show that in weak field limit Schwarzschild Bertotti-Robinson black hole (Schwarzschild-BR BH) turns into Schwarzschild black hole immersed in external uniform ma…
Euclid preparation. XCVIII. Cosmology Likelihood for Observables in Euclid (CLOE). 5: Extensions beyond the standard modelling of theoretical probes and systematic effects
Euclid Collaboration, L. W. K. Goh, A. Nouri-Zonoz +301
Euclid is expected to establish new state-of-the-art constraints on extensions beyond the standard LCDM cosmological model by measuring the positions and shapes of billions of gala…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
Simple CDM dynamics
Pierros Ntelis, Jackson Levi Said
In this paper, we introduce the CDM model and compare it to the concordance model. We present their respective epoch evolutions, perform a detailed dynamical analysis for each…
Euclid preparation. XLIII. Measuring detailed galaxy morphologies for Euclid with machine learning
Euclid Collaboration, B. Aussel, S. Kruk +255
The Euclid mission is expected to image millions of galaxies with high resolution, providing an extensive dataset to study galaxy evolution. We investigate the application of deep…
A -manifold with -correlators of -objects
Pierros Ntelis
In this paper, we describe a mathematical formalism for a -dimensional manifold with -correlators of types of objects, with cross correlations and contaminants.…
Optimal 1D Ly Forest Power Spectrum Estimation -- II. KODIAQ, SQUAD & XQ-100
Naim Göksel Karaçaylı, Nikhil Padmanabhan, Andreu Font-Ribera +9
We measure the 1D Ly power spectrum from Keck Observatory Database of Ionized Absorption toward Quasars (KODIAQ), The Spectral Quasar Absorption Database (SQUA…
Euclid: Forecasts from redshift-space distortions and the Alcock-Paczynski test with cosmic voids
N. Hamaus, M. Aubert, A. Pisani +127
Euclid is poised to survey galaxies across a cosmological volume of unprecedented size, providing observations of more than a billion objects distributed over a third of the full s…
preparation: XV. Forecasting cosmological constraints for the and CMB joint analysis
Euclid Collaboration, S. Ilić, N. Aghanim +207
The combination and cross-correlation of the upcoming data with cosmic microwave background (CMB) measurements is a source of great expectation since it will provide the l…
Testing the theory of gravity with DESI: estimators, predictions and simulation requirements
Shadab Alam, Christian Arnold, Alejandro Aviles +33
Shortly after its discovery, General Relativity (GR) was applied to predict the behavior of our Universe on the largest scales, and later became the foundation of modern cosmology.…
Functors of actions
P. Ntelis, A. Morris Universitat Bonn - Helmholtz-Institut fur Strahlen und Kernphysik, Bonn +1
In this document, we introduce a novel formalism for any field theory and apply it to the effective field theories of large-scale structure. The new formalism is based on functors…
Euclid: The importance of galaxy clustering and weak lensing cross-correlations within the photometric Euclid survey
I. Tutusaus, M. Martinelli, V. F. Cardone +87
The data from the Euclid mission will enable the measurement of the photometric redshifts, angular positions, and weak lensing shapes for over a billion galaxies. This large datase…
Peculiar velocity cosmology with type Ia supernovae
R. Graziani, M. Rigault, N. Regnault +20
Type Ia Supernovae have yet again the opportunity to revolutionize the field of cosmology as the new generation of surveys are acquiring thousands of nearby SNeIa opening a new era…
Cosmological constraints from cosmic homogeneity
Pierros Ntelis, Adam James Hawken, Stephanie Escoffier +2
In this paper, we study the normalised characteristic scale of transition to cosmic homogeneity, , as a cosmological probe. We use a compilation of SDSS galaxy s…
The scale of cosmic homogeneity as a standard ruler
Pierros Ntelis, Anne Ealet, Stephanie Escoffier +5
In this paper, we study the characteristic scale of transition to cosmic homogeneity of the universe, , as a standard ruler, to constrain cosmological parameters on…
Homogeneity in the search of the Dark Sector
Pierros Ntelis, Anne Ealet
In the era of precision cosmology, we investigate an novel method to probe the Dark Universe. By studying the fractality of the universe, we estimate a characteristic scale of homo…
Exploring cosmic homogeneity with the BOSS DR12 galaxy sample
Pierros Ntelis, Jean-Christophe Hamilton, Jean-Marc Le Goff +16
In this study, we probe the transition to cosmic homogeneity in the Large Scale Structure (LSS) of the Universe using the CMASS galaxy sample of BOSS spectroscopic survey which cov…
The Homogeneity Scale of the universe
Pierros Ntelis
In this study, we probe the cosmic homogeneity with the BOSS CMASS galaxy sample in the redshift region of . We use the normalised counts-in-spheres estimator $\mat…
A 14 Gpc study of cosmic homogeneity using BOSS DR12 quasar sample
Pierre Laurent, Jean-Marc Le Goff, Etienne Burtin +16
The BOSS quasar sample is used to study cosmic homogeneity with a 3D survey in the redshift range . We measure the count-in-sphere, , i.e. the average number o…