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Validation of the HERA Phase I Epoch of Reionization 21 cm Power Spectrum Software Pipeline
(The American Astronomical Society., 2022)
We describe the validation of the HERA Phase I software pipeline by a series of modular tests, building up to an
end-to-end simulation. The philosophy of this approach is to validate the software and algorithms used in ...
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 ...
HERA Phase I Limits on the Cosmic 21 cm Signal: Constraints on Astrophysics and Cosmology during the Epoch of Reionization
(The American Astronomical Society., 2022)
Recently, the Hydrogen Epoch of Reionization Array (HERA) has produced the experiment’s first upper limits on
the power spectrum of 21 cm fluctuations at z ∼ 8 and 10. Here, we use several independent theoretical models ...
Meningitis during COVID -19 pandemic in the Democratic Republic of Congo: A call for concern
(Elsevier, 2022-01-01)
Meningitis is a severe infection and a significant public health challenge. The meningitis outbreak resurfaced amid the coronavirus disease 2019 (COVID-19) pandemic in the Democratic Republic of Congo (DRC). The outbreak ...
Superhorizon Perturbations: A Possible Explanation of the Hubble–Lemaître Tension and the Large-scale Anisotropy of the Universe.
(The American Astronomical Society., 2022)
Current cosmological observations point to a serious discrepancy between the observed Hubble parameter obtained
using direct versus cosmic microwave background radiation measurements. Besides this so-called Hubble–
Lemaître ...
MIGHTEE: Total intensity radio continuum imaging and the COSMOS/XMM-LSS Early Science fields
(University of the Western Cape, 2022)
MIGHTEE is a galaxy evolution survey using simultaneous radio continuum, spectropolarimetry, and spectral line observations from the South African MeerKAT telescope. When complete, the survey will image ∼20 deg2 over the ...
Direction-dependent corrections in polarimetric radio imaging. Iii. A-to-Z solver— Modeling the full jones antenna aperture illumination pattern
(IOP Publishing, 2022)
In this third paper of a series describing direction-dependent corrections for polarimetric radio imaging, we present
the the A-to-Z solver methodology to model the full Jones antenna aperture illumination pattern (AIP) ...
Nickel contamination analysis at cost-effective silver printed paper-based electrodes based on carbon black dimethylglyoxime ink as electrode modifier
(International Association of Physical Chemists, 2022)
Electrochemical detection of metal cations at paper-based sensors has been suggested as an attractive alternative to current spectroscopic and chromatographic detection techniques due to the ease of ...
Improvement of hydriding kinetics of LaNi5-type metal alloy through substitution of nickel with tin followed by palladium deposition
(Indian Academy of Sciences, 2022)
Hydrogen absorption performances of LaNi5 alloy are sensitive to the surface reactions with poisonous gases,
such as oxygen, readily forming oxides/hydroxides. In this study, we report the studies on the hydrogen ...
Extremely broad lyαline emission from the molecular intragroup medium in Stephan’s quintet: evidence for a turbulent cascade in a highly clumpy multiphase medium?
(IOP Publishing, 2022)
We present Hubble Space Telescope Cosmic Origin Spectrograph (COS) UV line spectroscopy and integral-field
unit (IFU) observations of the intragroup medium in Stephan’s Quintet (SQ). SQ hosts a 30 kpc long shocked ...