3 papers
astro-ph.GA2025
Asymmetries in stellar streams induced by a galactic merger
Claire Guillaume, Florent Renaud, Nicolas F. Martin +6
Stellar streams are sensitive to perturbations from, e.g., giant molecular clouds, bars and spiral arms, infalling dwarf galaxies, or globular clusters which can imprint gaps, clum…
astro-ph.SR2025
Asteroseismic investigation of HD 140283: The Methuselah star
M. S. Lundkvist, J. R. Larsen, Y. Li +12
HD 140283 is a well-studied metal-poor subgiant and a Gaia benchmark star, often used for testing stellar models due to its proximity, brightness, and low metallicity ([Fe/H] = -2.…
astro-ph.SR2024
The age of the Methuselah star in light of stellar evolution models with tailored abundances
C. Guillaume, G. Buldgen, A. M. Amarsi +5
Context. HD140283, or the Methuselah star, is a well-known reference object in stellar evolution. Its peculiar chemical composition, proximity and absence of reddening makes it an…