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Cosmological Perturbation Theory for streams of relativistic particles

Name: Cosmological Perturbation Theory for streams of relativistic particles
Start: 2014-11-17T11:30:00+01:00
End: 2014-11-17T12:30:00+01:00
Location: CERN

by Hélène Dupuy

Monday 17 Nov 2014, 11:30 → 12:30 Europe/Zurich

4/2-011 - TH common room (CERN)

4/2-011 - TH common room

CERN

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Description

I will present a new set of equations, designed to study the time evolution of relativistic species in the nonlinear regime. Derivation is based on conservation laws. In this approach, the standard study of a phase-space distribution function is replaced by a study of two macroscopic fields per flow. Focusing on subhorizon scales, all the physical information is eventually encoded in a compact and handy motion equation. Any free-streaming species, relativistic or not, can be included in it. Invariance properties of the different equations will also be discussed.