Insights from super-metal-rich stars: Is the Milky Way bar young?

S Nepal, C Chiappini, G Guiglion, M Steinmetz… - Astronomy & …, 2024 - aanda.org
Bar formation and merger events can contribute to the rearrangement of stars within the
Galaxy in addition to triggering star formation (SF) epochs. Super-metal-rich (SMR) stars …

Why does the Milky Way have a bar?

S Khoperskov, I Minchev, M Steinmetz… - Monthly Notices of …, 2024 - academic.oup.com
There is no doubt that the Milky Way is a barred galaxy; however, factors that establish its
prominent morphology remain largely elusive. In this work, we attempt to constrain the …

Stellar atmospheric parameters from Gaia BP/RP spectra using uncertain neural networks

CP Fallows, JL Sanders - Monthly Notices of the Royal …, 2024 - academic.oup.com
With the plentiful information available in the Gaia BP/RP spectra, there is significant scope
for applying discriminative models to extract stellar atmospheric parameters and …

Probing the strength of radial migration via churning by using metal-rich red giant stars from APOGEE

C Lehmann, S Feltzing, D Feuillet… - Monthly Notices of the …, 2024 - academic.oup.com
Making use of the APOGEE DR17 catalogue with high quality data for 143 509 red giant
branch stars we explore the strength of different mechanisms that causes a star to radially …

Evolution of lithium in the disc of the Galaxy and the role of novae

S Borisov, N Prantzos, C Charbonnel - Astronomy & Astrophysics, 2024 - aanda.org
Context. Lithium plays a crucial role in probing stellar physics, stellar and primordial
nucleosynthesis, and the chemical evolution of the Galaxy. Stars are considered to be the …

The evolution of lithium in FGK dwarf stars-Influence of planets and Galactic migration

FL de Andrés, R de la Reza, P Cruz… - Astronomy & …, 2024 - aanda.org
This work aims to investigate the behaviour of the lithium abundance in stars with and
without detected planets. Our study is based on a sample of 1332 FGK main-sequence stars …

Abundances of neutron-capture elements in selected solar-type stars

V Sheminova, M Baratella, V D'Orazi - Astronomy & Astrophysics, 2024 - aanda.org
Aims. The primary objective of this study is to accurately determine the abundances of Cu,
Sr, Y, Zr, Ba, La, and Ce in selected solar-type stars. This will allow us to establish …

Timing the Milky Way bar formation and the accompanying radial migration episode

M Haywood, S Khoperskov, V Cerqui… - arXiv preprint arXiv …, 2024 - arxiv.org
We derive the metallicity profile of the Milky Way low-$\alpha $ disc population from 2 to 20
kpc from the Galactic centre in 1 Gyr age bins using the astroNN catalogue, and show that it …