T.J.L. de Boer
- High resolution spectroscopy of Red Giant Branch stars and the chemical evolution of the Fornax dwarf spheroidal galaxy
- Semaine de l'Astrophysique: du 3 au 6 juin 2014: Paris Université Diderot
- Book/source title
- SF2A-2014: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics
- Pages (from-to)
- Paris: Société Francaise d’Astronomie et d’Astrophysique
- Document type
- Conference contribution
- Faculty of Science (FNWI)
- Anton Pannekoek Institute for Astronomy (API)
From VLT-FLAMES high-resolution spectra, we determine the abundances of several α, iron-peak and neutron-capture elements in 47 Red Giant Branch stars in the Fornax dwarf speroidal galaxy. We confirm that SNe Ia started to contribute to the chemical enrichment of Fornax at [Fe/H] between -2.0 and - 1.8 dex. Combining these abundances with accurate age estimates, we date the onset of SNe Ia to ≈ 12-10 Gyrs ago. Our results are compatible with an initial mass function that lacks the most massive stars and with a star formation going on throughout the whole history of Fornax.
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