#cosmological observations
topiccosmological observations
3 papers · 1 filter
astro-ph.CO2026
Growth, geometry, and early-universe split of the matter density parameter
Felicitas Keil, Isaac Tutusaus, Alain Blanchard
The paper separates the present‑day matter density parameter Ωₘ into geometric, growth, and early‑universe contributions using DES, Planck, DESI BAO, Pantheon+ supernovae, and RSD…
astro-ph.CO2026
Exploring Hu-Sawicki-like modified gravity with Genetic Algorithms
Chiara De Leo, Elisa Fazzari, Matteo Martinelli +1
The paper uses genetic algorithms to generate and test Hu‑Sawicki‑like f(R) modified‑gravity models against current background cosmological observations, finding only modest deviat…
astro-ph.CO2026
DESI constraints on two-field quintessence with exponential potentials
George Alestas, Marienza Caldarola, Indira Ocampo +2
The paper examines a dark‑energy model with two scalar fields having double‑exponential potentials that together behave like a single shallow potential, and tests its viability usi…