13 papers
Coupled quintessence from an axion dark sector
Rayff de Souza, Edmund J. Copeland, Jailson Alcaniz
Recent observational data arising from the DESI collaboration has hinted at a possible departure from the standard CDM cosmological model, preferring instead the presence of a d…
Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking
Xiaoyun Shao, Facundo Toscano, Diego Garcia Lambas +5
The Cosmic Microwave Background (CMB) reaches homogeneity at relatively modest angular scales compared to the expectation of the standard CDM model revealing an important chall…
Hubble tension and small-scale inhomogeneities on light propagation
Lucila Kraiselburd, Cassio Pigozzo, Susana J. Landau +1
Context. A major observational challenge within the standard cosmological framework is the Hubble tension, a statistically significant () disagreement between the Hubble…
A model-independent assessment of the late-time dark energy density evolution
Rayff de Souza, Agripino Sousa-Neto, Javier E. González +1
Combined measurements of Baryon Acoustic Oscillations (BAO) from the Dark Energy Spectroscopic Survey (DESI), the Cosmic Microwave Background (CMB) and Type Ia Supernovae (SN Ia),…
Thawing quintessence and transient cosmic acceleration in light of DESI
Rayff de Souza, Gabriel Rodrigues, Jailson Alcaniz
Recent analysis of the DESI Collaboration challenges the -Cold Dark Matter (CDM) model, suggesting evidence for a dynamic dark energy. These results are obtained in the con…
Cosmography with DESI DR2 and SN data
Gabriel Rodrigues, Rayff de Souza, Jailson Alcaniz
In this paper, we present a kinematic analysis of the Universe's expansion history using cosmography, with a particular emphasis on the jerk parameter , which is equal to one…