@misc{gkogkou2025foregroundremovalhi21, title={Foreground removal in HI 21 cm intensity mapping under frequency-dependent beam distortions}, author={Athanasia Gkogkou and Victor Bonjean and Jean-Luc Starck and Marta Spinelli and Panagiotis Tsakalides}, year={2025}, eprint={2511.13328}, archivePrefix={arXiv}, primaryClass={astro-ph.CO}, url={https://arxiv.org/abs/2511.13328}, }