Journées de Rencontre Jeunes Chercheurs 2023

Session

Cosmology

24 oct. 2023, 10:00

Présidents de session

Cosmology

• Michel Aguena (APC)

Cosmology

• Michel Aguena (APC)

11. Session overview

Dr Michel Aguena (APC)

24/10/2023 10:00

52. Cosmology with Type Ia Supernovae and the ZTF survey

Madeleine Ginolin (IP2I/IN2P3/CNRS)

24/10/2023 11:00

Cosmology

I will present the construction of a Hubble diagram, especially the standardisation of Type Ia Supernovae luminosity. I will then talk about the ongoing ZTF survey, which is the current state of the art low redshift survey. I will then talk about one of the challenge faced by Supernovae cosmology now: the astrophysics dependency of Type Ia Supernovae.

54. Development of an ultra-fast, likelihood-based, distance inference, for the next generation of type-Ia supernovae surveys

Dylan KUHN

24/10/2023 11:30

Cosmology

As of today, the Hubble diagram, which maps the luminosity distance-redshift relation for type-Ia supernovae (SNe Ia), allows us to infer cosmological parameters such as the Dark Energy equation of state (w) with an accuracy reaching a few per cent. Upcoming SNIa samples with O(30,000) SNe (30 times the current worldwide statistics), will allow us to reach the per cent level and start probing...

57. 21cm emission in primordial clouds with full chemical computation

Hugo Plombat (Laboratoire Univers et Particules de Montpellier)

24/10/2023 12:00

Cosmology

The 21cm hydrogen line is present during all the eras following the cosmological recombination, containing information about both the cosmology and the astrophysical processes at work in the universe.
During this presentation, I will discuss the 21cm emission from collapsing gas clouds. I will particularly take into account the gas cooling due to thermal molecular functions. To do so, one...

26. Talk Cosmo #1

Thomas Sainrat (CentraleSupélec)

47. Talk Cosmo #2

Marie Lynn Abdul Karim (IRFU/DPhP CEA-Saclay)