CosmoFONDUE - Cosmological Fundamental Observables and Novel Discoveries in Universe Evolution

Session

21cm Intensity Mapping

3C

12 Jun 2025, 14:30

Main auditorium (École de physique, Quai Ernest-Ansermet 24, 1205 Genève, Suisse)

75. Fundamental physics with HI in emission and absorption

Matteo Viel

12/06/2025, 14:30

Intensity mapping

talk

Introduction to 21cm physics

54. MeerKLASS: A single-dish HI Intensity Mapping survey

Laura Wolz (University of Manchester)

12/06/2025, 15:00

Intensity mapping

talk

Intensity mapping surveys of neutral hydrogen (HI) are a new way to measure the large-scale matter distribution of our Universe at low spatial resolution over a wide range of redshifts, and thus constrain cosmological parameters such as the Universal expansion. MeerKAT can be used in a “single-dish” mode to access large cosmic scales above 1 degree that are not accessible to the...

37. Foreground removal and angular power spectrum estimation of 21cm signal using harmonic space ILC

Albin Joseph (Arizona State University)

12/06/2025, 15:20

Intensity mapping

talk

Mapping the distribution of neutral atomic hydrogen (HI) in the Universe through its 21 cm emission line provides a powerful cosmological probe to map the large-scale structures and shed light on various cosmological phenomena. The Baryon Acoustic Oscillations at low redshifts can potentially be probed by sensitive HI intensity mapping experiments and constrain the properties of dark energy....

11. Weighing neutrinos with 21cm Intensity Mapping with the SKAO

Gabriele Autieri (SISSA)

12/06/2025, 15:40

Intensity mapping

talk

The large-scale distribution of neutral hydrogen in the late Universe, mapped through the hydrogen 21cm line emission using radio telescopes, holds significant potential to emerge as a key cosmological probe in the coming years. In the work that I’m going to present, we developed a Gaussian likelihood code for the 21cm intensity mapping power spectrum and the 21cm-galaxy clustering...