Partecipanti: Elisabetta Caffau (GEPI, Observatoire de Paris, F)
Abstract
The extremely metal-poor (EMP) stars hold in their atmospheres the fossil record of the chemical composition of the early phases of the Galactic evolution.
The chemical analysis of such objects provides important constraints on these early phases of the Universe. The chemical composition of EMP stars can give insight on the star-formation of low-mass stars from a metal-poor gas and on the masses of the Pop.III first-generation massive stars.
EMP stars are very rare objects; to dig them out large amounts of data have to be considered.A large fraction of EMP stars are C-enhanced and the smaller [Fe/H] value the highestis the fracion of CEMP stars in the sample of EMP stars.It will be here reported on the analysis on several CEMP stars and on ideas on their formation.
See you on thursday in the seminars' room, floor -1, via Ranzani 1, on time at 14h.
Next seminars:
- May 14th, at 14:00 Elena Mazzotta Epifani (INAF, Oss. Astron. Capodimonte)
- May 21st, at 14:00 NO SEMINAR SCHEDULED (overlapping LIX congresso SAIt http://www.sait.it)
- May 28th, at 14:00 Paola Marigo (Univ. di Padova)
The complete list of seminars is available at: http://davide2.bo.astro.it/?page_id=4531
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