Swiss Cosmology Days 2025 - ETH Zurich

Session

New Experiments

Jun 6, 2025, 2:00 PM

Siemens Auditorium (HIT E 51) (ETH Zurich)

35. The Hydrogen Intensity and Real-time Analysis eXperiment (HIRAX) - Overview and Metrology

Jennifer Studer (ETH Zurich)

6/6/25, 2:00 PM

New Experiments

The Hydrogen Intensity and Real-time Analysis eXperiment (HIRAX) radio interferometer array aims to observe neutral hydrogen (HI) through intensity mapping (IM) in the redshift range of 0.775-2.55. It is currently being built at the South African Radio Astronomy Observatory (SARAO) Square Kilometer Array (SKA) site in South Africa. HI IM makes it possible to tomographically probe large,...

18. 4MOST Cosmology Redshift Survey: BG and LRG Target Selection

Aurélien Verdier (EPFL)

6/6/25, 2:15 PM

New Experiments

The 4-metre Multi-Object Spectroscopic Telescope is currently being installed on the VISTA Telescope (Paranal) and will start observations of multiple science cases at the end of this year. One of the 18 experiments is the Cosmology Redshift Survey (CRS) which is composed of 4 samples: Bright Galaxies (BG, 0.15 < z < 0.4), Luminous Red Galaxies (LRG, 0.4 < z < 1.0), Quasars (QSO, 0.9 < z <...

3. The future Stage-V Spectroscopic Surveys

Jean-Paul Kneib (EPFL)

6/6/25, 2:30 PM

New Experiments

In this presentation, I will give a status of the next generation Stage-V spectroscopic surveys in preparation. This include in particular the 6.5m Multiplexed Survey Telescope from Tsinghua, the Spectroscopic Stage-V project from LBNL and the European Widefield Spectroscopic Telescope. I will describe the main science motivation of the different projects, and their timelime. I will also...