140 citations · 1.4k across the 46 of their papers we have counts for
8 papers · 1 filter
Quasi-spherical collapse of matter in CDM
Cornelius Rampf
We report the findings of new exact analytical solutions to the cosmological fluid equations, namely for the case where the initial conditions are perturbatively close to a spheric…
General relativistic weak-field limit and Newtonian N-body simulations
Christian Fidler, Thomas Tram, Cornelius Rampf +3
We show how standard Newtonian N-body simulations can be interpreted in terms of the weak-field limit of general relativity by employing the recently developed Newtonian motion gau…
Hermann Hankel's "On the general theory of motion of fluids", an essay including an English translation of the complete Preisschrift from 1861
Barbara Villone, Cornelius Rampf
The present is a companion paper to "A contemporary look at Hermann Hankel's 1861 pioneering work on Lagrangian fluid dynamics" by Frisch, Grimberg and Villone (2017). Here we pres…
Interacting neutrinos in cosmology: exact description and constraints
Isabel M. Oldengott, Thomas Tram, Cornelius Rampf +1
We consider the impact of neutrino self-interactions described by an effective four-fermion coupling on cosmological observations. Implementing the exact Boltzmann hierarchy for in…
Shell-crossing in quasi-one-dimensional flow
Cornelius Rampf, Uriel Frisch
Blow-up of solutions for the cosmological fluid equations, often dubbed shell-crossing or orbit crossing, denotes the breakdown of the single-stream regime of the cold-dark-matter…
Quasilinear observables in dark energy cosmologies
Cornelius Rampf, Eleonora Villa, Luca Amendola
What are the fundamental limitations of reconstructing the properties of dark energy, given cosmological observations in the quasilinear regime in a range of redshifts, to be as pr…