Battle of the CH motions: aliphatic versus aromatic contributions to astronomical PAH emission and exploration of the aliphatic, aromatic, and ethynyl CH stretches. - Esposito, Vincent J; Bejaoui, Salma; Billinghurst, Brant E; Boersma, Christiaan; Fortenberry, Ryan C; Salama, Farid (Monthly Notices of the Royal Astronomical Society, 2024)