IEA PBH #1

18 mai 2020, 08:00 → 19 mai 2020, 20:00 Europe/Paris

Join Zoom Meeting
https://u-paris.zoom.us/j/91268375577?pwd=SmtWMS9Jd0l3S2RVUm1xL3UwdThRdz09

Meeting ID: 912 6837 5577
Password: 128401

For Kazuya's talks, please connect to:

http://viavca.in2p3.fr/site.html

lundi 18 mai

14:00 → 14:30 Introductory overview

Orateur: Vincent Vennin (APC Paris)

Vennin_kickoff.pdf

14:45 → 15:30 The stochastic-delta N formalism

Orateur: David Wands

Wands_Paris_2020.pptx

15:45 → 16:30 Quantum diffusion and PBHs

Orateur: Chris Pattison

Pattison_PBH_Paris_May_2020.pdf

16:30 → 17:00 Tea/coffee/whisky online break

17:00 → 17:45 Stochastic inflation in phase space

Orateur: Julien Grain (Institut d'Astrophysique Spatiale)

IEAMeeting_18052020.pdf

mardi 19 mai

14:00 → 15:00 APC theory talk: General relativistic weak-field limit and Newtonian N-body simulations

Abstract: Future galaxy surveys such as Euclid, LSST and SKA will cover larger and larger scales where general relativistic effects become important. On the other hand, our study of large scale structure still relies on Newtonian N-body simulations. I show how standard Newtonian N-body simulations can be interpreted in terms of the weak-field limit of general relativity. Our framework allows the inclusion of radiation perturbations and the non-linear evolution of matter. I show how to construct the weak-field metric by combining Newtonian simulations with results from Einstein-Boltzmann codes. I discuss observational effects on weak lensing and ray tracing, identifying important relativistic corrections. Finally, I briefly discuss recent developments of GR simulations in cosmology.

Orateur: Kazuya Koyama

15:15 → 16:00 Turning in the landscape: a new mechanism for generating Primordial Black Holes

Orateur: Jacopo Fumagalli feat Lukas Witkowski (IAP)

Fumagalli_Witkowski_IEA_PBH_1.pdf

16:00 → 16:30 Tea/coffee/whisky online break

16:30 → 17:15 PBHs from the preheating instability

Orateur: Lucas Pinol (Institut d'Astrophysique de Paris)

Preheating instability and PBHs.pdf

17:15 → 18:15 Concluding discussions