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SKAO HI intensity mapping: blind foreground subtraction challenge
(University of the Western Cape, 2022)
Neutral Hydrogen Intensity Mapping (H I IM) surveys will be a powerful new probe of cosmology. However, strong astrophysical
foregrounds contaminate the signal and their coupling with instrumental systematics further ...
Planck 2018 results: VI. Cosmological parameters
(EDP Sciences, 2020)
We present cosmological parameter results from the final full-mission Planck measurements of the cosmic microwave background (CMB) anisotropies, combining information from the temperature and polarization maps and the ...
Constraining the reionization history using deep learning from 21-cm tomography with the Square Kilometre Array
(Oxford University Press, 2020)
Upcoming 21-cm surveys with the SKA1-LOW telescope will enable imaging of the neutral hydrogen distribution on cosmological scales in the early Universe. These surveys are expected to generate huge imaging data sets that ...
Evidence for cosmic acceleration with next-generation surveys: A model-independent approach
(Oxford University Press, 2020)
We quantify the evidence for cosmic acceleration using simulations of H(z) measurements from SKA- and Euclid-like surveys. We perform a non-parametric reconstruction of the Hubble parameters and its derivative to obtain ...
Statistical recovery of the BAO scale from multipoles of the beam-convolved 21 cm correlation function
(Royal Astronomical Society, 2021)
Despite being designed as an interferometer, theMeerKAT radio array (a Square Kilometre Array pathfinder) can also be used in
autocorrelation (‘single-dish’) mode, where each dish scans the sky independently. Operating ...
Planck 2018 results: III. High frequency instrument data processing and frequency maps
(EDP Sciences, 2020)
This paper presents the High Frequency Instrument (HFI) data processing procedures for the Planck 2018 release. Major improvements in mapmaking have been achieved since the previous Planck 2015 release, many of which were ...
Planck 2018 results: VIII. Gravitational lensing
(EDP Sciences, 2020)
We present measurements of the cosmic microwave background (CMB) lensing potential using the final Planck 2018 temperature and polarization
data. Using polarization maps filtered to account for the noise anisotropy, we ...
Considerations for optimizing the photometric classification of supernovae from the Rubin observatory
(IOP Publishing, 2022)
The Vera C. Rubin Observatory will increase the number of observed supernovae (SNe) by an order of
magnitude; however, it is impossible to spectroscopically confirm the class for all SNe discovered. Thus,
photometric ...
The Copernican principle in light of the latest cosmological data
(University of the Western Cape, 2022)
We pursue a program to confront observations with inhomogeneous extensions of the FLRW metric. The main idea is to test the Copernican principle (CP) rather than assuming it a priori. We consider the CDM model endowed with ...
Consequences of using a smooth cosmic distance in a lumpy Universe. I.
(American Physical Society, 2022)
How do we appropriately fit a model based on an idealised Friedmann-Lemaˆıtre Robertson-Walker
spacetime to observations made from a single location in a lumpy Universe? We address this question
for surveys that measure ...