Speaker
Barry Ginat
(University of Oxford)
Description
Gravitational collapse in large-scale structure formation is a highly non-linear process, governed by the Vlasov-Poisson system. In this talk, I will describe how this process leads to a flow of structure to small phase-space scales, in a manner which gives rise to a universal power-law scaling of the phase-space power-spectrum at small scales. Then, I will describe how this process leads to a relaxation of the mean field, towards a generalised Lynden-Bell distribution (in 1D). This distribution has a specific power-law tail in energy, which can be derived using statistical mechanical techniques. I will also comment on 3D implications for violent relaxation.
Author
Barry Ginat
(University of Oxford)
Co-authors
Mr
Michael Nastac
(University of Oxford)
Robert Ewart
(Princeton University)
Prof.
Alexander Schekochihin
(University of Oxford)