88 citations · 523 across the 35 of their papers we have counts for
35 papers
Testing Statistical Isotropy in the FRB Sky Distribution: A Selection-Function-Aware Framework
Bruno W. N. Ribeiro, Thais Lemos, Carlos A. P. Bengaly +5
We perform a test of statistical isotropy in the Universe using the sky distribution of fast radio bursts (FRBs), based on a compilation of events detected by multiple surve…
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…
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),…
Exploring cosmological constraints on galaxy formation time
Agripino Sousa-Neto, Maria Aldinêz Dantas, Javier E. González +2
The Universe consists of a variety of objects that formed at different epochs, leading to variations in the formation time which represents the time elapsed from the onset of struc…
Forecasting constraints on quintessential inflation from future generation of galaxy and CMB surveys
G. Rodrigues, F. B. M. dos Santos, S. Santos da Costa +5
We investigate the constraining power of future CMB and galaxy surveys on models of quintessential inflation realized within the framework of -attractors. We analyze how these f…
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…
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 challe…
Cosmological-model independent limits on photon mass from FRB and SNe data
Thais Lemos, Rodrigo Gonçalves, Joel Carvalho +1
Electromagnetic emissions from astrophysical sources at cosmological distances can be used to estimate the photon mass, . In this paper, we combine measurements of the dispers…
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 conte…
Reconstructing the redshift evolution of Type Ia supernovae absolute magnitude
Rodrigo von Marttens, Javier Gonzalez, Jailson Alcaniz
This work investigates a potential time dependence of the absolute magnitude of Type Ia Supernovae (SN Ia). Employing the Gaussian Process approach, we obtain the SN Ia absolute ma…
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 c…
Thawing Dark Energy and Massive Neutrinos in Light of DESI
Gabriel Rodrigues, Rayff de Souza, Jamerson Rodrigues +1
Recent analyses have shown that a dynamic dark energy modeled by the CPL parameterization of the dark energy equation of state (EoS) can ease constraints on the total neutrino mass…
Evidence for dynamical dark energy from DESI-DR2 and SN data? A symbolic regression analysis
Agripino Sousa-Neto, Carlos Bengaly, Javier E. Gonzalez +1
Recent measurements of Baryon Acoustic Oscillations (BAO) from the Dark Energy Spectroscopic Survey (DESI DR2), combined with data from the cosmic microwave background (CMB) and Ty…
Stage IV CMB forecasts for warm inflation
F. B. M. dos Santos, G. Rodrigues, R. de Souza +1
We report forecast constraints on warm inflation in the light of future cosmic microwave background (CMB) surveys, with data expected to be available in the coming decade. These ob…
Double-well Inflation: observational constraints and theoretical implications
G. Rodrigues, J. G. Rodrigues, F. B. M. dos Santos +1
We revisit the small field double-well inflationary model and investigate its observational viability in light of the current Cosmic Microwave Background data. In particular, consi…
Cosmological constraints from angular homogeneity scale measurements
Xiaoyun Shao, Carlos A. P. Bengaly, Rodrigo S. Gonçalves +2
In this paper, we obtain new measurements of the angular homogeneity scale () from the BOSS DR12 and eBOSS DR16 catalogs of Luminous Red Galaxies of the Sloan Digital Sky Surv…
ANDES, the high resolution spectrograph for the ELT: science goals, project overview and future developments
A. Marconi, M. Abreu, V. Adibekyan +286
The first generation of ELT instruments includes an optical-infrared high-resolution spectrograph, indicated as ELT-HIRES and recently christened ANDES (ArmazoNes high Dispersion E…
A comparative analysis of dissipation coefficients in warm inflation
F. B. M. dos Santos, R. de Souza, J. S. Alcaniz
In the warm inflation scenario, the early cosmic acceleration is driven by the inflaton coupled to thermal fields, decaying into radiation and leaving a hot universe populated by r…
A search for the fine-structure constant evolution from fast radio bursts and type Ia supernovae data
Thais Lemos, Rodrigo Gonçalves, Joel Carvalho +1
The search for a space-time variation of the fundamental constants has been explored over the years to test our physical theories. In this paper, we use the dispersion measure ($DM…
Is natural inflation in agreement with CMB data?
F. B. M. dos Santos, G. Rodrigues, J. G. Rodrigues +2
Natural inflation is a well-motivated model for the early universe in which an inflaton potential of the pseudo-Nambu-Goldstone form, , can naturally d…
Constraining non-minimally coupled -exponential inflation with CMB data
Felipe Bruno Medeiros dos Santos, Simony Santos da Costa, Raimundo Silva +2
The -exponential inflation is driven by a class of primordial potentials, derived in the framework of braneworld scenarios, that generalizes the well-known power law inflation.…
Measuring the scale of cosmic homogeneity with SDSS-IV DR14 quasars
R. S. Gonçalves, G. C. Carvalho, C. A. P. Bengaly +2
The quasar sample of the fourteenth data release of the Sloan Digital Sky Survey (SDSS-IV DR14) is used to determine the cosmic homogeneity scale in the redshift range $0.80<z<2.24…
Smoothing expansion rate data to reconstruct cosmological matter perturbations
J. E. Gonzalez, J. S. Alcaniz, J. C. Carvalho
The existing degeneracy between different dark energy and modified gravity cosmologies at the background level may be broken by analysing quantities at the perturbative level. In t…
Limits on evolution of the fine-structure constant in runaway dilaton models from Sunyaev-Zeldovich Observations
R. F. L. Holanda, L. R. Colaço, R. S. Gonçalves +1
In this paper, new bounds on possible variations of the fine structure constant, , for a class of runaway dilaton models are performed. By considering a possible evolution with…