223 citations · 511 across the 4 of their papers we have counts for
6 papers
EnsAI: An Emulator for Atmospheric Chemical Ensembles
Michael Sitwell
Ensemble-based methods for data assimilation and emission inversions are a popular way to encode flow-dependency within the model error covariance. While most ensemble methods do n…
Canadian Hydrogen Intensity Mapping Experiment (CHIME) Pathfinder
Kevin Bandura, Graeme E. Addison, Mandana Amiri +31
A pathfinder version of CHIME (the Canadian Hydrogen Intensity Mapping Experiment) is currently being commissioned at the Dominion Radio Astrophysical Observatory (DRAO) in Pentict…
Coaxing Cosmic 21cm Fluctuations from the Polarized Sky using m-mode Analysis
J. Richard Shaw, Kris Sigurdson, Michael Sitwell +2
In this paper we continue to develop the m-mode formalism, a technique for efficient and optimal analysis of wide-field transit radio telescopes, targeted at 21 cm cosmology. We ex…
The Imprint of Warm Dark Matter on the Cosmological 21-cm Signal
Michael Sitwell, Andrei Mesinger, Yin-Zhe Ma +1
We investigate the effects of warm dark matter (WDM) on the cosmic 21-cm signal. If dark matter exists as WDM instead of cold dark matter (CDM), its non-negligible velocities can i…
Quantization of Perturbations in an Inflating Elastic Solid
Michael Sitwell, Kris Sigurdson
A sufficiently rigid relativistic elastic solid can be stable for negative pressure values and thus is capable of driving a stage of accelerated expansion. If a relativistic elasti…
All-Sky Interferometry with Spherical Harmonic Transit Telescopes
J. Richard Shaw, Kris Sigurdson, Ue-Li Pen +2
In this paper we describe the spherical harmonic transit telescope, a novel formalism for the analysis of transit radio telescopes. This all-sky approach bypasses the curved sky co…