3 papers
astro-ph.CO2025
Covariant cosmography in the presence of local structures: comparing exact solutions and perturbation theory
Maharshi Sarma, Christian Marinoni, Basheer Kalbouneh +2
Recent observational evidence of axially symmetric anisotropies in the local cosmic expansion rate motivates an investigation of whether they can be accounted for within the Lemaît…
astro-ph.CO2025
The anisotropic expansion rate of the local Universe and its covariant cosmographic interpretation
Basheer Kalbouneh, Christian Marinoni, Roy Maartens +5
Without making any assumption on the underlying geometry and metric of the local Universe, we provide a measurement of the expansion rate fluctuation field using the Cosmicflows-4…
astro-ph.CO2024
Expanding covariant cosmography of the local Universe: incorporating the snap and axial symmetry
Basheer Kalbouneh, Jessica Santiago, Christian Marinoni +3
Studies show that the model-independent, fully non-perturbative covariant cosmographic approach is suitable for analyzing the local Universe . However, accurately…