Une équipe d'astrophysiciens explore les 13 étoiles géantes qui ont la plus faible métallicité des Nuages de Magellan (LMC et SMC). Ils étudient ainsi les premières étapes de la formation de ces galaxies et de leur évolution chimique. Ils ont découvert que ces étoiles sont plus riches que celles de la Voie Lactée en europium, un élément clé de la nucléosynthèse par capture rapide de neutrons, le processus r. Les chercheurs parviennent alors à déterminer l'origine de ce processus. Une étude publiée dans The Astronomical Journal.
Emissions
- Ça Se Passe Là-Haut
- #1252 : Les étoiles pauvres en métaux des Nuages de Magellan sont riches en europium
Publié le par eric simon
Eric Simon
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