3 papers
astro-ph.CO2026
Methodological Frontiers in 21-cm Intensity Mapping: the Treatment of Systematics and Foreground Contamination
Marta Spinelli, Matilde Barberi-Squarotti, José Luis Bernal +29
The distribution of neutral hydrogen (HI) in the post-reionization universe traces the cosmic large-scale structure and therefore serves as a powerful cosmological probe. An effici…
astro-ph.IM2025
LCS: A Learnlet-Based Sparse Framework for Blind Source Separation
V. Bonjean, A. Gkogkou, J. L. Starck +1
Blind source separation (BSS) plays a pivotal role in modern astrophysics by enabling the extraction of scientifically meaningful signals from multi-frequency observations. Traditi…
astro-ph.CO2025
Foreground removal in HI 21 cm intensity mapping under frequency-dependent beam distortions
Athanasia Gkogkou, Victor Bonjean, Jean-Luc Starck +2
Neutral hydrogen (HI) intensity mapping with single-dish experiments is a powerful approach for probing cosmology in the post-reionization epoch. However, the presence of bright fo…