#cosmic microwave background
13 papers · 1 filter
Inflation, Open Universes, and Dark Energy
Anton Chudaykin, Mikhail M. Ivanov, Renata Kallosh +3
The authors analyze how allowing a small negative spatial curvature and/or a time‑varying dark energy equation of state changes the inferred scalar spectral index nₛ from CMB and g…
A Periodically Interacting Dark Sector: Signatures and Constraints from CMB and Cosmic Expansion Data
Marco Antonio Cardoso Alvarez, Micol Benetti, Leila Graef +1
The paper proposes a cosmological model where the interaction between dark matter and dark energy oscillates in sign over time, representing the back‑reaction of super‑Hubble fluct…
Early- and late-time constraints on Wald-Gauss-Bonnet topological dark energy and implications for the and tensions
Stylianos A. Tsilioukas, Fotios K. Anagnostopoulos, Spyros Basilakos +2
The paper investigates Wald‑Gauss‑Bonnet topological dark energy as a late‑time modification to the expansion history, performing early‑ and late‑Universe data analyses that show i…
CAMB v2: cosmological power spectra for high-precision surveys
Antony Lewis
The paper introduces CAMB v2, an updated code that provides fast, high‑precision predictions of lensed CMB and matter power spectra for upcoming surveys, featuring a new treatment…
Non-Primordial Contribution to the Cosmic Microwave Background
Akshith Asundi, Vikram Khaire
The paper investigates whether dust‑enshrouded starbursts at very high redshift can contribute a small non‑primordial component to the cosmic microwave background, using CMB anisot…
Signatures of Modified Gravity on Linear Scales in a Dynamical Dark Energy Background
Yo Toda, Adrià Gómez-Valent
The paper studies how possible deviations from General Relativity on linear scales influence cosmic structure growth in a universe with dynamical dark energy (CPL model), and uses…