4 papers
A Case for an Inhomogeneous Einstein-de Sitter Universe
Peter Raffai, Dominika E. R. Kis, Dávid A. Ködmön +3
We present a local-to-global cosmological framework in which cosmic acceleration emerges from structure formation in an inhomogeneous Einstein-de Sitter (iEdS) universe, without da…
Constraints on AvERA Cosmologies from Cosmic Chronometers and Type Ia Supernovae
Adrienn Pataki, Péter Raffai, István Csabai +2
We constrain AvERA cosmologies in comparison with the flat CDM model using cosmic chronometer (CC) data and the Pantheon+ sample of type Ia supernovae (SNe Ia). The analysis in…
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.…
Cosmic chronometers, Pantheon+ supernovae, and quasars favor coasting cosmologies over the flat CDM model
Peter Raffai, Adrienn Pataki, Rebeka L. Böttger +2
We test and compare coasting cosmological models with curvature parameters in units and the flat CDM model by fitting them to co…