From the 1 of 5 linked papers with an AI index.
5 papers
XCDM: a running vacuum strategy for crossing the phantom divide
Joan Solà Peracaula, Adrià Gómez-Valent, Alex González-Fuentes
The paper introduces the ΛXCDM model, a composite running‑vacuum dark energy scenario that naturally crosses the phantom divide and fits recent supernova, BAO, and CMB data better…
Revisiting model-independent constraints on spatial curvature and cosmic ladders calibration: updated and forecast analyses
Arianna Favale, Adrià Gómez-Valent, Marina Migliaccio
Model-independent approaches have gained increasing attention as powerful tools to investigate persistent tensions between cosmological observations and the predictions of CDM.…
Reconstruction of dark energy and late-time cosmic expansion using the Weighted Function Regression method
Alex González-Fuentes, Adrià Gómez-Valent
Recent data from multiple supernova catalogs and DESI, when combined with CMB, suggest a non-trivial evolution of dark energy (DE) at the CL. This evidence is typically q…
Composite Dark Energy and the Cosmological Tensions
Adria Gómez-Valent, Joan Solà Peracaula
The standard cosmological model currently in force, aka CDM, has been plagued with a variety of tensions in the last decade or so, which puts it against the wall. At the core o…
Efficient Compression of Redshift-Space Distortion Data for Late-Time Modified Gravity Models
Yo Toda, Adrià Gómez-Valent, Kazuya Koyama
Current cosmological observations allow for deviations from the standard growth of large-scale structures in the universe. These deviations could indicate modifications to General…