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CMB-HD: Astro2020 RFI Response
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CMB-HD is a proposed ultra-deep (0.5 uk-arcmin), high-resolution (15 arcseconds) millimeter-wave survey over half the sky that would answer many outstanding questions in both fundamental physics of the Universe and astrophysics. This survey would be delivered in 7.5 years of observing 20,000 square degrees, using two new 30-meter-class off-axis cross-Dragone telescopes to be located at Cerro Toco in the Atacama Desert. Each telescope would field 800,000 detectors (200,000 pixels), for a total of 1.6 million detectors.
Forward citations
Cited by 2 Pith papers
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Characterising the epoch of reionisation using the cross-correlation of the kSZ effect and CMB lensing
The kSZ-squared field cross-correlated with CMB lensing is a new observable that, in simulations, is sensitive to the duration and midpoint of reionisation and could be detected by a CMB-HD-like experiment.
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The CMB optical depth constrains the duration of reionization
Fixing reionization's endpoint from Lyα forest data turns the CMB optical depth into a duration probe, placing the high value τ≈0.09 in ~2σ tension with SPT patchy kSZ limits.
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