21 cm Cosmology Workshop

Session

Wednesday Morning - Foregrounds and Sky Model; Session Chair - Albert Stebbins

Aug 31, 2022, 9:00 AM

B343 Sterling Hall (UW Madison)

26. Practical Foreground Removal with CHIME

Richard Shaw (UBC)

8/31/22, 9:00 AM

14. H I constraints from the cross-correlation of eBOSS galaxies and Green Bank Telescope intensity maps

Laura Wolz (Manchester)

8/31/22, 9:25 AM

I will present the joint analysis of HI Intensity Mapping observations with three galaxy samples: the Luminous Red Galaxy (LRG) and Emission Line Galaxy (ELG) samples from the eBOSS survey, and the WiggleZ Dark Energy Survey sample. The H I intensity maps are Green Bank Telescope observations of the redshifted 21cm emission on 100deg2 covering the redshift range 0.6 < z < 1.0. I will show...

8. 21cm Intensity Mapping: opportunities and challenges on the road to the SKA Observatory

Marta Spinelli (ETH)

8/31/22, 9:50 AM

A key point for 21cm Intensity Mapping studies in the post-reionization Universe is the subtraction of the bright foregrounds,orders of magnitude stronger than the pristine cosmological signal. In this talk, I will briefly describe the status of MeerKLASS, an Intensity Mapping survey with the MeerKAT telescope. Moreover, I will report the results of an effort, led by the SKA Intensity Mapping...

7. MeerKAT HI intensity mapping cross-correlations with overlapping galaxy surveys at z~0.4

Steve Cunnington (Manchester/ MeerKAT)

8/31/22, 10:15 AM

I will present details of the first detection of cosmological signal using HI intensity mapping with a multi-dish array. For this we used the 64 dish MeerKAT telescope, a pathfinder for the Square Kilometre Array Observatory (SKAO), operating in single-dish mode, whereby the array is used as a collection of scanning auto-correlation dishes rather than as an interferometer. The detection is...

15. Improved upper limits on the 21-cm signal power spectrum of neutral hydrogen from LOFAR

Florent Mertens (LOFAR)

8/31/22, 10:40 AM

Direct detection of the Epoch of Reionization via the redshifted 21-cm line will have unprecedented implications on the study of structure formation in the early Universe. This exciting goal is challenged by the difficulty of extracting the feeble 21-cm signal buried under bright astrophysical foregrounds and contaminated by numerous systematics. The LOFAR-EoR project has recently made...