220 citations · 1.2k across the 39 of their papers we have counts for
4 papers · 1 filter
Nonlinear modulation of the HI power spectrum on ultra-large scales. I
Obinna Umeh, Roy Maartens, Mario Santos
Intensity mapping of the neutral hydrogen brightness temperature promises to provide a three-dimensional view of the universe on very large scales. Nonlinear effects are typically…
Cosmological ensemble and directional averages of observables
Camille Bonvin, Chris Clarkson, Ruth Durrer +2
We show that at second order, ensemble averages of observables and directional averages do not commute due to gravitational lensing -- observing the same thing in many directions o…
Do we care about the distance to the CMB? Clarifying the impact of second-order lensing
Camille Bonvin, Chris Clarkson, Ruth Durrer +2
It has recently been shown that second-order corrections to the background distance-redshift relation can build up significantly at large redshifts, due to an aggregation of gravit…
Cosmological evolution of the gravitational entropy of the large-scale structure
Giovanni Marozzi, Jean-Philippe Uzan, Obinna Umeh +1
We consider the entropy associated with the large-scale structure of the Universe in the linear regime, where the Universe can be described by a perturbed Friedmann-Lemaître spacet…