#observational constraints
5 papers · 1 filter
Dark Matter Constraints from Small-Scale Cosmic Structure
Ethan O. Nadler, Keir K. Rogers, Alex Drlica-Wagner
The paper reviews how observations of small‑scale cosmic structures, such as dwarf galaxies and the Lyman‑α forest, constrain the microphysical properties of dark matter models.
Cosmological consequences of scale-dependent Barrow-Tsallis entropy
Giuseppe Gaetano Luciano, Orlando Luongo, Marco Muccino
The paper explores a cosmological model with a scale‑dependent Barrow‑Tsallis entropy, deriving modified Friedmann equations and confronting the model with various early‑ and late‑…
Late-Time Cosmological Tests of a Minisuperspace Generalized-Uncertainty-Principle Deformation
G. G. L. Nashed
The paper examines how a quadratic generalized‑uncertainty‑principle deformation of the FLRW minisuperspace alters the Friedmann equation and uses late‑time observational data (cos…
Constraints on Horndeski Gravity with Phantom Crossing
Krishna Naidoo, James Hallam, Tessa Baker +1
The paper introduces Asymptotic Cubic Galileon (ACG) models, a subclass of Horndeski scalar‑tensor theories that can cross the phantom divide (w = –1) while remaining minimally cou…
How Holographic is the Dark Energy? A Spline Nodal reconstruction approach
Miguel A. Zapata, Gabriela Garcia-Arroyo, Shahnawaz A. Adil +1
The paper investigates a generalized holographic dark energy model by reconstructing its density‑horizon relation with a spline‑based non‑parametric function and tests it against c…