Ateliers action Dark Energy 2022

Session

Neutrinos

6 mai 2022, 09:00

Amphithéâtre Gastaut (RDC) (AMU)

2. Review

Eric Armengaud (IRFU - CEA)

06/05/2022 09:00

21. Neutrinos and simulations

Dr Julian Adamek (University of Zurich)

06/05/2022 09:30

TBD Neutrinos

13. Modeling of High Column Density systems in the Ly-α Forests Correlation Function

ting tan

06/05/2022 09:45

The Lyman-α forest is detected as the series of absorption lines in the quasar spectra, caused by the Lyman-α transitions of neutral hydrogen in the low-density, high-redshift intergalactic medium (IGM). It is a biased continuous tracer of the quasi-linear matter density field, and the auto (cross) correlation function of the forests (with quasars) has been used to detect the Baryon Acoustic...

18. Lyman-alpha forest tomography and cross-correlation with cosmic voids

Corentin Ravoux

06/05/2022 10:00

The Lyman-alpha (Lya) forest is a unique probe of large-scale matter fluctuations at high redshift (z>2). In this presentation, I will show how to obtain 3D maps of the matter distribution from Lya data using tomographic reconstruction methods. This field was pioneered by deep, small-field observations. Here, I will present the largest tomographic map of matter fluctuations at z>2 over the...

14. The resilience of the Etherington--Hubble relation

Natalie Hogg (IPhT CEA-Saclay)

06/05/2022 10:15

The Etherington reciprocity theorem, or distance duality relation (DDR), describes the relationship between luminosity and angular diameter distances in pseudo-Riemannian spacetimes where photons are massless and photon number is conserved. In this talk, I will show the first joint constraints on H0 and the DDR with percentage accuracy obtained with late-time data, and use this result to...