65 citations · 492 across the 22 of their papers we have counts for
22 papers
An Attractor-Repeller model of the Local Universe : The -Szekeres spacetime and Perturbation Theory
Maharshi Sarma, Christian Marinoni, Basheer Kalbouneh
The standard linearly perturbed Friedmann-Lemaître-Robertson-Walker (FLRW) framework provides an accurate description of the Universe on large scales but cannot fully capture the n…
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…
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…
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…
Cosmography of the Local Universe by Multipole Analysis of the Expansion Rate Fluctuation Field
Basheer Kalbouneh, Christian Marinoni, Roy Maartens
We establish a relationship between the multipoles of the expansion rate fluctuation field which capture in an accurate way deviations from isotropy in the redshift-distance r…
Covariant cosmography: the observer-dependence of the Hubble parameter
Roy Maartens, Jessica Santiago, Chris Clarkson +2
The disagreement between low- and high-redshift measurements of the Hubble parameter is emerging as a serious challenge to the standard model of cosmology. We develop a covariant c…