Marta Spinelli

TL;DR: In this paper, a model-independent method for estimating the spatial curvature of the universe is proposed, based on avoiding the DE-dominated regime and nonparametric modeling of the DE equation of state.

TL;DR: In this article, the authors investigate the impact of galactic polarized foregrounds on the extraction of the global 21 cm signal through realistic sky and dipole simulations both in a low frequency band from $50$ to $100$~MHz, where a 21~cm absorption profile is expected, and in a higher frequency band ($100-200$ ~MHz), the presence of a polarized contaminant with complex frequency structure can bias the amplitude and the shape of the reconstructed signal parameters in both bands.

TL;DR: In this paper, the authors show that the coupling between beam sidelobes and the foreground structure can complicate the cleaning of the MeerKAT beam and show that this effect is constrained to a narrow region in parallel space and can be reduced if the maps are carefully re-smoothed to a common lower resolution.

TL;DR: In this article, the authors presented simulations of the polarized synchrotron emission in the $50-200$~MHz range, obtained from the observed properties of diffuse polarized emission at low frequencies.

TL;DR: In this paper, the first blind foreground subtraction challenge for neutral hydrogen intensity mapping (HI IM) was held and nine foreground cleaning pipelines joined the Challenge, based on statistical source separation algorithms, blind polynomial fitting, and an astrophysical-informed parametric fit to foregrounds.