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arxiv: astro-ph/0412423 · v1 · submitted 2004-12-16 · 🌌 astro-ph

Observational evidence for a different IMF in the early Galaxy

Sara Lucatello (1 , 2) , Raffaele G. Gratton (1) , Timothy C. Beers (3) , Eugenio Carretta (1 , 4) (1- INAF OAPD; 2- Dipartimento di Astronomia , Universita' di Padova; 3- MSU; 4- INAF OABO) This is my paper
classification 🌌 astro-ph
keywords earlygalaxystarsdifferentevidenceamongstarguecarbon-enhanced
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The unexpected high incidence of carbon-enhanced, s-process enriched unevolved stars amongst extremely metal-poor stars in the halo provides a significant constraint on the Initial Mass Function (IMF) in the early Galaxy. We argue that these objects are evidence for the past existence of a large population of intermediate-mass stars, and conclude that the IMF in the early Galaxy was different from the present, and shifted toward higher masses.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Observational Signatures and Constraints on the Intermediate Neutron-Capture Process. The Case of the CEMP star TYC 6044-714-1 (RAVE J094921.8-161722)

    astro-ph.SR 2026-05 conditional novelty 5.0

    Abundances and Ba isotopic ratios in TYC 6044-714-1 are best reproduced by s+r nucleosynthesis models; i+s+r models require extreme conditions and fail to match the full pattern.

  2. Observational Signatures and Constraints on the Intermediate Neutron-Capture Process. The Case of the CEMP star TYC 6044-714-1 (RAVE J094921.8-161722)

    astro-ph.SR 2026-05 conditional novelty 4.0

    High-precision abundances and Ba isotopic ratios in TYC 6044-714-1 favor an s+r nucleosynthesis scenario over i-process models, which require implausible conditions and mismatch isotopic data.