Cover Picture: Astron. Nachr. 5/2025

Le résumé fourni par la source

Distribution of known fundamental‐mode classical Cepheids in the Milky Way (data from Pietrukowicz et al. 2021). Top: positions in Galactocentric Cartesian coordinates, colour‐coded by age; bottom: Age versus Galactocentric distance, colour‐coded by metallicity (for objects with spectroscopic [Fe/H] measurements). The age distribution of Milky Way Cepheids is a particularly interesting and puzzling observable in the Galactic astrophysics context. Finding the youngest Cepheids in the inner Galaxy seems to be in conflict with the widely accepted inside‐out formation scenario where by star formation progressively reached the outer regions of the Galaxy over the past billion years. A solution of this puzzle is offered in the paper by F. Anders et al. published in this issue ( e70009 ). image

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.