EPFL/CERN/UNIGE Discussion Sessions

Europe/Zurich
4-2-037 - TH meeting room (CERN)

4-2-037 - TH meeting room

CERN

20
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Description

To prompt collaboration among the different groups in cosmology in the Léman area, we hold a common discussion session every month and a half. In those, recent news in the field are addressed by experts at a level that we can all understand. Please, suggest papers/subjects to the local organizers. The suggested papers for this session are:

 

 

 
    • 15:00 16:00
      Nonlinear relativistic effects in cosmology 1h

      Cosmological processes are traditionally modelled via linear
      perturbation theory around the Friedmann-Lemaître-Robertson-Walker class
      on scales larger than a few hundred Megaparsec, combined with nonlinear
      Newtonian gravity below this scale. Few treatments exist of the
      nonlinear relativistic regime, and their application is generally
      limited to toy models with a high degree of symmetry.

      In this talk, I will review the recent application of numerical
      relativity to the study of this regime in more general settings. After
      an introduction to the techniques of numerical relativity, I will
      describe several cosmological models where nonlinear relativistic
      effects impact on major physical properties, such as the rate of
      expansion, the collapse of gravitational structures, and the propagation
      of light.

      Speaker: Dr. Eloisa Bentivegna
    • 16:15 17:00
      Can the CMB save weak lensing? 45m

      The recent KiDS measurement of galaxy lensing correlated with CMB lensing:
      https://arxiv.org/abs/1703.03383v1

      Also relevant:
      https://arxiv.org/abs/1607.01761
      https://arxiv.org/abs/1601.05720v3

      Speaker: Dr. Jonathan Blazek (EPFL Observatory)