Chemical analysis of prestellar cores in Ophiuchus yields short timescales and rapid collapseStefano Bovino, Alessandro Lupi, Andrea Giannetti, Giovanni Sabatini, Dominik R. G. Schleicher, Friedrich Wyrowski and Karl M. MentenA&A, 654 (2021) A34DOI: https://doi.org/10.1051/0004-6361/202141252