000006053 001__ 6053
000006053 005__ 20240109101008.0
000006053 0247_ $$2DOI$$a10.1051/0004-6361/202244605
000006053 037__ $$aSCART-2023-0014
000006053 100__ $$aDrimmel, Ronald
000006053 245__ $$aA new resonance-like feature in the outer disc of the Milky Way
000006053 260__ $$c2023
000006053 520__ $$aModern astrometric and spectroscopic surveys have revealed a wealth of structure in the phase space of stars in the Milky Way, with evidence of resonance features and non-equilibrium processes. Using Gaia DR3, we present evidence of a new resonance-like feature in the outer disc of the MilkyWay. The feature is most evident in the angular momentum distribution of the young Classical Cepheids, a population for which we can derive accurate distances over much of the Galactic disc.We then search for similar features in the outer disc using a much larger sample of red giant stars, as well as a compiled list of over 31 million stars with spectroscopic line-of-sight velocity measurements. While much less evident in these two older samples, the distribution of stars in action-configuration space suggests that resonance features are present here as well. The position of the feature in action-configuration space suggests that the new feature may be related to the Galactic bar, but other possibilities are discussed.
000006053 594__ $$aNO
000006053 6531_ $$aGalaxy: kinematics and dynamics
000006053 6531_ $$aGalaxy: structure
000006053 6531_ $$aGalaxy: disc
000006053 6531_ $$aStars: variables: Cepheids
000006053 700__ $$aKhanna, Shourya
000006053 700__ $$aD'Onghia, Elena
000006053 700__ $$aTepper-García, Thorsten
000006053 700__ $$aBland-Hawthorn, Joss
000006053 700__ $$aChemin, Laurent
000006053 700__ $$aRipepi, Vincenzo
000006053 700__ $$aRomero-Gómez, Mercé
000006053 700__ $$aRamos, Pau
000006053 700__ $$aPoggio, Eloisa
000006053 700__ $$aAndrae, Rene
000006053 700__ $$aBlomme, Ronny
000006053 700__ $$aCantat-Gaudin, Tristan
000006053 700__ $$aCastro-Ginard, Alfred
000006053 700__ $$aClementini, Gisella
000006053 700__ $$aFiqueras, Francesca
000006053 700__ $$aFrémat, Yves
000006053 700__ $$aFouesneau, Morgan
000006053 700__ $$aLobel, Alex
000006053 700__ $$aMarshall, Douglas
000006053 700__ $$aMuraveva, Tatiana
000006053 773__ $$cA10 (13pp)$$pAstronomy & Astrophysics$$v670$$y2023
000006053 8560_ $$fronny.blomme@observatoire.be
000006053 85642 $$ahttps://ui.adsabs.harvard.edu/abs/2022arXiv220712977D/abstract
000006053 85642 $$ahttps://arxiv.org/abs/2207.12977
000006053 905__ $$apublished in
000006053 980__ $$aREFERD