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Sky-averaged 21-cm signal extraction using multiple antennas with an SVD framework: the REACH case
Anchal Saxena, P. Daniel Meerburg, Eloy de Lera Acedo +2
In a sky-averaged 21-cm signal experiment, the uncertainty on the extracted signal depends mainly on the covariance between the foreground and 21-cm signal models. In this paper, w…
Astrophysical Constraints from the SARAS3 non-detection of the Cosmic Dawn Sky-Averaged 21-cm Signal
H. T. J. Bevins, A. Fialkov, E. de Lera Acedo +4
Observations of the redshifted 21-cm line of atomic hydrogen have resulted in several upper limits on the 21-cm power spectrum and a tentative detection of the sky-averaged signal…
A General Bayesian Framework to Account for Foreground Map Errors in Global 21-cm Experiments
Michael Pagano, Peter Sims, Adrian Liu +3
Measurement of the global 21-cm signal during Cosmic Dawn (CD) and the Epoch of Reionization (EoR) is made difficult by bright foreground emission which is 2-5 orders of magnitude…
The REACH radiometer for detecting the 21-cm hydrogen signal from redshift 7.5 to 28
E. de Lera Acedo, D. I. L. de Villiers, N. Razavi-Ghods +31
Observations of the 21-cm line from primordial hydrogen promise to be one of the best tools to study the early epochs of the Universe: the Dark Ages, the Cosmic Dawn, and the subse…
Cosmological constraints on decaying axion-like particles: a global analysis
Csaba Balázs, Sanjay Bloor, Tomás E. Gonzalo +8
Axion-like particles (ALPs) decaying into photons are known to affect a wide range of astrophysical and cosmological observables. In this study we focus on ALPs with masses in the…
Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
Elcio Abdalla, Guillermo Franco Abellán, Amin Aboubrahim +200
In this paper we will list a few important goals that need to be addressed in the next decade, also taking into account the current discordances between the different cosmological…
Impact of the Primordial Stellar Initial Mass Function on the 21-cm Signal
T. Gessey-Jones, N. S. Sartorio, A. Fialkov +6
Properties of the first generation of stars (Pop III), such as their initial mass function (IMF), are poorly constrained by observations and have yet to converge between simulation…
A Comprehensive Bayesian re-analysis of the SARAS2 data from the Epoch of Reionization
H. T. J. Bevins, E. de Lera Acedo, A. Fialkov +4
We present a Bayesian re-analysis of the sky-averaged 21-cm experimental data from SARAS2 using nested sampling implemented with polychord, spectrally smooth foreground modelling i…