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Impact of Gaia-Sausage-Enceladus merger revealed by a single cosmic clock: thick-to-thin disc transition, gas disc shrinking and bar formation
Natsuki Funakoshi, Daisuke Kawata, Jason L. Sanders +5
Whether the formation of the Galactic bar was connected to the Gaia-Sausage-Enceladus (GSE) merger, the last significant merger experienced by the Milky Way, remains an open questi…
Orbital migration and heating history of the Galactic disc: a transition between the bimodal discs
HanYuan Zhang, Vasily Belokurov, Jason L. Sanders +7
Stellar orbits in the Galactic disc evolve from their birth to the current shape through both radial migration and dynamical heating. The history of their secular evolution is impr…
Thick-to-thin disc transition and gas disc shrinking induced by the Gaia-Sausage-Enceladus merger
Natsuki Funakoshi, Daisuke Kawata, Jason L. Sanders +3
Understanding the Milky Way disc formation requires characterising its structural and kinematic properties as functions of stellar age. Using red giant stars from APOGEE DR17 and G…
Clues to growth and disruption of two neighbouring spiral arms of the Milky Way
Natsuki Funakoshi, Noriyuki Matsunaga, Daisuke Kawata +3
Studying the nature of spiral arms is essential for understanding the formation of the intricate disc structure of the Milky Way. The European Space Agency's Gaia mission has provi…