GDR CoPhy Episode 4

Session

Tuesday Afternoon

2 juin 2026, 14:00

Clermont Ferrand

64. Simons Observatory LAT status

Merry Duparc (ijclab)

02/06/2026 14:00

The Simons Observatory is a new CMB experiment located in the Atacama desert, in Chile. It is composed of 6 Small Aperture Telescopes (SATs) and a Large Aperture Telescope (LAT). Some of these telescopes, including the LAT, have already seen first light.

The LAT aims to make arcminute-resolution maps of 50% of the sky in a wide frequency range from 30 to 280 GHz, with an unmatched depth for...

50. SPT-3G: latest results and future prospects

Lennart Balkenhol

02/06/2026 14:30

SPT-3G is the latest receiver installed on the South Pole Telescope (SPT), a dedicated cosmic microwave background (CMB) telescope at the Amundsen-Scott station in Antarctica. The 16,000 detectors and 10-meter primary mirror allow us to produce low-noise and high-resolution maps of the millimeter-wave sky in temperature and polarisation. These data are rich in cosmological information and...

46. How to measure cosmology from nothing: void-galaxy cross-correlation with DESI

Katayoon GHAEMI (Centre de Physique des Particules de Marseille (CPPM))

02/06/2026 15:00

Cosmic voids provide a novel probe of structure formation and cosmic expansion. They are sensitive to structure growth, dark energy, modified gravity, and sum of neutrino masses. Using the DESI spectroscopic data, we perform void identification and present the preliminary measurements of the void-galaxy cross-correlation function. By measuring the void-galaxy cross-correlation function we can...

45. Cosmology from the Rubin Void Size Function

Pierre BOCCARD (CPPM)

02/06/2026 15:30

Cosmic voids are a powerful tool to extract cosmological constraints and study galaxy properties’ dependence on the environment. This project builds a pipeline for constraining cosmological parameters using the void size function. We will build the void catalogs from the Roman SkySim5000 galaxy catalogs using the publicly available VIDE void finder. The cosmological constraints’ inference...

51. SPT-3G: latest results and future prospects

Dr Lennart Balkenhol (IAP)

SPT-3G is the latest receiver installed on the South Pole Telescope (SPT), a dedicated cosmic microwave background (CMB) telescope at the Amundsen-Scott station in Antarctica. The 16,000 detectors and 10-meter primary mirror allow us to produce low-noise and high-resolution maps of the millimeter-wave sky in temperature and polarisation. These data are rich in cosmological information and...