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Obinna Umeh

Observed names: Obinna C Umeh, Umeh, O., Umeh, Obinna
ORCID: 0000-0003-3398-9591
Observed ORCID: 0000-0003-3398-9591
OpenAlex ID: A5068629205
Does the growth of structure affect our dynamical models of the Universe? The averaging, backreaction, and fitting problems in cosmology
2011 · Chris Clarkson, George Ellis, et al. · Reports on Progress in Physics · 221
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(Mis)interpreting supernovae observations in a lumpy universe
2012 · Chris Clarkson, George F. R. Ellis, et al. · Monthly Notices of the Royal Astronomical Society · 126
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xPand : an algorithm for perturbing homogeneous cosmologies
2013 · Cyril Pitrou, Xavier Roy, et al. · Classical and Quantum Gravity · 113
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Is backreaction really small within concordance cosmology?
2011 · Chris Clarkson, Obinna Umeh · Classical and Quantum Gravity · 76
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Nonlinear relativistic corrections to cosmological distances, redshift and gravitational lensing magnification: I. Key results
2014 · Obinna Umeh, Chris Clarkson, et al. · Classical and Quantum Gravity · 60
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Nonlinear relativistic corrections to cosmological distances, redshift and gravitational lensing magnification: II. Derivation
2014 · Obinna Umeh, Chris Clarkson, et al. · Classical and Quantum Gravity · 57
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Do we care about the distance to the CMB? Clarifying the impact of second-order lensing
2015 · Camille Bonvin, Chris Clarkson, et al. · Journal of Cosmology and Astroparticle Physics · 49
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A general relativistic signature in the galaxy bispectrum: the local effects of observing on the lightcone
2017 · Obinna Umeh, Sheean Jolicoeur, et al. · Journal of Cosmology and Astroparticle Physics · 41
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The dipole of the galaxy bispectrum
2019 · Chris Clarkson, Eline M de Weerd, et al. · Monthly Notices of the Royal Astronomical Society Letters · 40
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The full-sky angular bispectrum in redshift space
2019 · Enea Di Dio, Ruth Durrer, et al. · Journal of Cosmology and Astroparticle Physics · 40
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Cosmological ensemble and directional averages of observables
2015 · Camille Bonvin, Chris Clarkson, et al. · Journal of Cosmology and Astroparticle Physics · 37
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The Hubble rate in averaged cosmology
2011 · Obinna Umeh, Julien Larena, et al. · Journal of Cosmology and Astroparticle Physics · 35
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What is the distance to the CMB?
2014 · Chris Clarkson, Obinna Umeh, et al. · Journal of Cosmology and Astroparticle Physics · 32
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Detecting the relativistic bispectrum in 21cm intensity maps
2021 · Sheean Jolicoeur, Roy Maartens, et al. · Journal of Cosmology and Astroparticle Physics · 30
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Detecting the relativistic galaxy bispectrum
2020 · Roy Maartens, Sheean Jolicoeur, et al. · Journal of Cosmology and Astroparticle Physics · 30
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The observed galaxy bispectrum from single-field inflation in the squeezed limit
2018 · Kazuya Koyama, Obinna Umeh, et al. · Journal of Cosmology and Astroparticle Physics · 30
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Imprints of local lightcone \ projection effects on the galaxy bispectrum. Part II
2017 · Sheean Jolicoeur, Obinna Umeh, et al. · Journal of Cosmology and Astroparticle Physics · 25
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Non-linear relativistic contributions to the cosmological weak-lensing convergence
2014 · Sambatra Andrianomena, Chris Clarkson, et al. · Journal of Cosmology and Astroparticle Physics · 25
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Local primordial non-Gaussianity in the relativistic galaxy bispectrum
2021 · Roy Maartens, Sheean Jolicoeur, et al. · Journal of Cosmology and Astroparticle Physics · 24
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Imprints of local lightcone projection effects on the galaxy bispectrum. Part III. Relativistic corrections from nonlinear dynamical evolution on large-scales
2018 · Sheean Jolicoeur, Obinna Umeh, et al. · Journal of Cosmology and Astroparticle Physics · 24
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Nonlinear modulation of the HI power spectrum on ultra-large scales. I
2016 · Obinna Umeh, Roy Maartens, et al. · Journal of Cosmology and Astroparticle Physics · 21
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A scale-dependent bias on linear scales: the case for H i intensity mapping at z = 1
2017 · Aurélie Pénin, Obinna Umeh, et al. · Monthly Notices of the Royal Astronomical Society · 20
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Scanning the parameter space of holographic superconductors
2009 · Obinna C Umeh · Journal of High Energy Physics · 20
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Multipoles of the relativistic galaxy bispectrum
2020 · Eline M. de Weerd, Chris Clarkson, et al. · Journal of Cosmology and Astroparticle Physics · 19
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General relativistic effects in the galaxy bias at second order
2019 · Obinna Umeh, Kazuya Koyama, et al. · Journal of Cosmology and Astroparticle Physics · 19
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Works count: 52
Citation count: 1,342
H-index: 21
I10-index: 30
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