Lithium in globular clusters
2010 (English)In: Light Elements in the Universe / [ed] Charbonnel C; Tosi M; Primas F; Chiappini C, Cambridge: Cambridge University Press , 2010, no 268, 249-256 p.Conference paper (Refereed)
I review recent progress in mapping out and understanding the behaviour of stellar surface abundances or human as evidenced by spectroscopic studies of nearby globulin clusters (GCs) It will become clear that these observations necessitate revisions to the canonical picture of stellar and globulin-cluster evolution stars evolve with additional non-convective mixing processes and CCs are not, simple stellar populations In spite of these complications. GCs are excellent test beds for chemical-abundance studies Spectroscopic observations of CC stars of different, evolutionary stages reveal systematic trends of sin face abundances likely caused by atomic diffusion and mixing Correcting for then combined effect, on surface lithium, a stellar solution to the cosmological lithium discrepancy is likely, if not, probable However, a definitive answer can only be given once we know the effective temperatures of win in subdwarfs and subgrants to high accuracy and understand the processes which give rise to the mixing needed to moderate atomic diffusion.
Place, publisher, year, edition, pages
Cambridge: Cambridge University Press , 2010. no 268, 249-256 p.
, IAU Symposium Proceedings Series, ISSN 1743-9213 ; 268
Stills Population II, atmospheres, abundances, diffusion, line formation, globular clusters: individual (M 92. NGC 6397, NGC 6752) cosmology early universe, techniques spectroscopic
IdentifiersURN: urn:nbn:se:uu:diva-136484DOI: 10.1017/S1743921310004205ISI: 000282786900042ISBN: 978-0-521-76506-0OAI: oai:DiVA.org:uu-136484DiVA: diva2:377552
268th Symposium of the International Astronomical Union Geneva, SWITZERLAND, NOV 09-13, 2009