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Chemical Abundances in the Nuclear Star Cluster of the Milky Way: alpha-Element Trends and Their Similarities with the Inner Bulge
N. Ryde, G. Nandakumar, M. Schultheis +15
A chemical characterization of the Galactic Center is essential for understanding its formation and structural evolution. Trends of alpha-elements, such as Mg, Si, and Ca, serve as…
Rediscovering the Milky Way with orbit superposition approach and APOGEE data I. Method validation
Sergey Khoperskov, Glenn van de Ven, Matthias Steinmetz +9
We introduce a novel orbit superposition method designed to reconstruct the stellar density structure, kinematics, and chemical abundance distribution of the entire Milky Way by le…
The disc origin of the Milky Way bulge: On the high velocity dispersion of metal-rich stars at low latitude
Tristan Boin, Paola Di Matteo, Sergey Khoperskov +5
Previous studies of the chemo-kinematic properties of stars in the Galactic bulge have revealed a puzzling trend. Along the bulge minor axis, and close to the Galactic plane, metal…
Timing the Milky Way bar formation and the accompanying radial migration episode
Misha Haywood, Sergey Khoperskov, Valeria Cerqui +3
We derive the metallicity profile of the Milky Way low- disc population from 2 to 20 kpc from the Galactic centre in 1 Gyr age bins using the astroNN catalogue, and show that it…
Metallicity distributions of halo stars: do they trace the Galactic accretion history?
Alice Mori, Paola Di Matteo, Stefania Salvadori +3
The standard cosmological scenario predicts a hierarchical formation for galaxies. Many substructures were found in the Galactic halo, identified as clumps in kinematic spaces, lik…