Accretion as a central engine of the universe
Patrick Hennebelle
CNRS - Université Paris-Saclay

While primordial universe was extremely uniform, it is now deeply structured with huge density contrasts from galaxy clusters to planets. This implies that intense episodes of accretion are taking place recursively at all spatial scales. How does it exactly happen and what role are these accretion events playing ? During the talk I will focus on three particular types of objects, namely the molecular clouds, the proto-stellar clusters and the late proto-planetary discs. For each of these three cases, I will describe how accretion proceeds and how it contributes, together with other physical processes, to drive the evolution of the system.

Date:	Vendredi, 12 mai 2017
Time:	11:00
Where:	Université Laval
	Pavillon Vachon
Contact:	Gilles Joncas