C
Cornelius Rampf
Researcher at Centre national de la recherche scientifique
Publications - 64
Citations - 1679
Cornelius Rampf is an academic researcher from Centre national de la recherche scientifique. The author has contributed to research in topics: General relativity & Dark matter. The author has an hindex of 22, co-authored 59 publications receiving 1360 citations. Previous affiliations of Cornelius Rampf include Albert Einstein Institution & Technion – Israel Institute of Technology.
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Cosmological parameters from large scale structure - geometric versus shape information
Jan Hamann,Steen Hannestad,Julien Lesgourgues,Julien Lesgourgues,Julien Lesgourgues,Cornelius Rampf,Yvonne Y. Y. Wong +6 more
TL;DR: In this article, the authors investigated the separate impact of shape and baryon acoustic oscillations on cosmological parameter estimation for current data, and showed that broad-band shape information currently contained in the SDSS DR7 halo power spectrum (HPS) is by far superseded by geometric information derived from the baryonic features.
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Interacting neutrinos in cosmology: exact description and constraints
Isabel M. Oldengott,Thomas Tram,Thomas Tram,Cornelius Rampf,Cornelius Rampf,Yvonne Y. Y. Wong +5 more
TL;DR: In this paper, the effect of neutrino self-interaction on cosmological observations was investigated using the Boltzmann hierarchy for interacting neutrinos, and the effects of the interaction on the cosmic microwave background (CMB) anisotropies were analyzed.
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General relativistic corrections to $N$-body simulations and the Zel'dovich approximation
TL;DR: In this paper, the authors define a new gauge, the $N$-body gauge, in which this relativistic correction vanishes and show that a conventional Newtonian simulation includes all first-order relatvistic contributions (in the absence of radiation) if we identify the coordinates in Newtonian simulations with those in the relativistically-corrected gauge.
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General relativistic weak-field limit and Newtonian N-body simulations
Christian Fidler,Thomas Tram,Cornelius Rampf,Cornelius Rampf,Robert Crittenden,Kazuya Koyama,David Wands +6 more
TL;DR: In this paper, the weak-field limit of general relativity has been interpreted in terms of the weak field limit of the Newtonian motion gauge, allowing the inclusion of radiation perturbations and the non-linear evolution of matter.
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Lagrangian perturbations and the matter bispectrum I: fourth-order model for non-linear clustering
Cornelius Rampf,Thomas Buchert +1 more
TL;DR: In this paper, the Lagrangian perturbation theory of a homogeneous and isotropic universe in the non-relativistic limit is investigated, and the solutions up to the fourth order are derived.