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Observational evidence for a different IMF in the early Galaxy | | Sara Lucatello
; Raffaele G. Gratton
; Timothy C. Beers
; Eugenio Carretta
; | | Date: |
16 Dec 2004 | | Journal: | Astrophys.J. 625 (2005) 833-847 | | Subject: | astro-ph | | Affiliation: | 1,2), Raffaele G. Gratton , Timothy C. Beers , Eugenio Carretta (1,4) (1- INAF OAPD; 2- Dipartimento di Astronomia, Universita’ di Padova; 3- MSU; 4- INAF OABO | | Abstract: | 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. | | Source: | arXiv, astro-ph/0412423 | | Services: | Forum | Review | PDF | Favorites | |
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