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49 papers · 1 filter
A novel approach for the automated segmentation and volume quantification of cardiac fats on computed tomography
Érick Oliveira Rodrigues, FFC Morais, NAOS Morais +3
The deposits of fat on the surroundings of the heart are correlated to several health risk factors such as atherosclerosis, carotid stiffness, coronary artery calcification, atrial…
Type Ia Supernova Magnitude Step from the local Dark Matter Environment
Heinrich Steigerwald, Davi Rodrigues, Stefano Profumo +1
Residuals in the Hubble diagram at optical wavelengths and host galaxy stellar mass are observed to correlate in Type Ia supernovae (SNe Ia) (`magnitude step'). Among possible prog…
Nonconservative unimodular gravity: a viable cosmological scenario
Júlio C. Fabris, Marcelo H. Alvarenga, Mahamadou Hamani-Daouda +1
In this work we review the issue of imposing the conservation of the energy-momentum tensor as a necessary condition to recover the equivalence between the unimodular gravity and G…
Remarks on the black hole shadows in Kerr-de Sitter space times
Eunice Omwoyo, Humberto Belich, Júlio C. Fabris +1
This work is geared towards analysis of shadows cast by Kerr-de Sitter (KdS) and Kerr-de Sitter Revisited (RKdS) black holes. Considering observers in the vicinity of the static ra…
Baryon acoustic oscillations in thin redshift shells from BOSS DR12 and eBOSS DR16 galaxies
Ranier Menote, Valerio Marra
In an age of large astronomical dateset and severe cosmological tensions, the case for model independent analyses is compelling. We present a set of 14 baryon acoustic oscillations…
Bianchi IX gravitational collapse of matter inhomogeneities
Leonardo Giani, Oliver F. Piattella, Alexander Yu. Kamenshchik
We investigate a model of gravitational collapse of matter inhomogeneities where the latter are modelled as Bianchi type IX (BIX) spacetimes. We found that this model contains, as…