6053 20240109101008.0 10.1051/0004-6361/202244605 DOI SCART-2023-0014 Drimmel, Ronald A new resonance-like feature in the outer disc of the Milky Way 2023 Modern astrometric and spectroscopic surveys have revealed a wealth of structure in the phase space of stars in the Milky Way, with evidence of resonance features and non-equilibrium processes. Using Gaia DR3, we present evidence of a new resonance-like feature in the outer disc of the MilkyWay. The feature is most evident in the angular momentum distribution of the young Classical Cepheids, a population for which we can derive accurate distances over much of the Galactic disc.We then search for similar features in the outer disc using a much larger sample of red giant stars, as well as a compiled list of over 31 million stars with spectroscopic line-of-sight velocity measurements. While much less evident in these two older samples, the distribution of stars in action-configuration space suggests that resonance features are present here as well. The position of the feature in action-configuration space suggests that the new feature may be related to the Galactic bar, but other possibilities are discussed. NO Galaxy: kinematics and dynamics Galaxy: structure Galaxy: disc Stars: variables: Cepheids Khanna, Shourya D'Onghia, Elena Tepper-García, Thorsten Bland-Hawthorn, Joss Chemin, Laurent Ripepi, Vincenzo Romero-Gómez, Mercé Ramos, Pau Poggio, Eloisa Andrae, Rene Blomme, Ronny Cantat-Gaudin, Tristan Castro-Ginard, Alfred Clementini, Gisella Fiqueras, Francesca Frémat, Yves Fouesneau, Morgan Lobel, Alex Marshall, Douglas Muraveva, Tatiana Astronomy & Astrophysics 670 2023 A10 (13pp) ronny.blomme@observatoire.be https://ui.adsabs.harvard.edu/abs/2022arXiv220712977D/abstract https://arxiv.org/abs/2207.12977 published in REFERD