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21 cm Cosmology Workshop

August 30, 2022 to September 2, 2022
UW Madison
America/Chicago timezone
The workshop focuses on sharing recent progress and challenges from all the major 21 cm intensity mapping efforts, both EoR and post-EoR, to help this field reach its full potential. We will discuss important common challenges: calibration, sources of local correlated signals, foreground mitigation, cross-correlations, systematics from digital signal processing, validation, and software tools.

Scientific organizing Committee

Session

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

Aug 31, 2022, 9:00 AM
B343 Sterling Hall (UW Madison)

B343 Sterling Hall

UW Madison

475 North Charter Street Madison, WI 53706

Presentation materials

There are no materials yet.

  1. 26. Practical Foreground Removal with CHIME
    Richard Shaw (UBC)
    8/31/22, 9:00 AM
  2. 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...

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  3. 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...

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  4. 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...

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  5. 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...

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