CO enhancement by magnetohydrodynamic waves - Striations in the Polaris Flare R. Skalidis, K. Gkimisi, K. Tassis, G. V. Panopoulou, V. Pelgrims, A. Tritsis and P. F. Goldsmith A&A, 673 (2023) A76 Published online: 10 May 2023 DOI: 10.1051/0004-6361/202345880