The structure and characteristic scales of molecular clouds Sami Dib, Sylvain Bontemps, Nicola Schneider, Davide Elia, Volker Ossenkopf-Okada, Mohsen Shadmehri, Doris Arzoumanian, Frédérique Motte, Mark Heyer, Åke Nordlund and Bilal Ladjelate A&A, 642 (2020) A177 Published online: 19 October 2020 DOI: 10.1051/0004-6361/202038849