Abundance correlations in mildly metal-poor stars. II. Light elements (C to Ca)

Details Abundance correlations in mildly metal-poor stars. II. Light elements (C to Ca) Abundance correlations in mildly metal-poor stars. II. Light elements (C to Ca)

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...433..285d&link_type=abstract

Astronomy and Astrophysics, Volume 433, Issue 1, April I 2005, pp.285-295

Astronomy and Astrophysics

Astrophysics

3

Stars: Abundances, Stars: Population Ii, Stars: Atmospheres, Nuclear Reactions, Nucleosynthesis, Abundances, Galaxy: Evolution

Scientific paper

Accurate relative abundances have been obtained for carbon, oxygen, sodium, aluminium, silicon, and calcium in a sample of mildly metal-poor stars. This analysis complements a previous study carried out by Jehin et al. ([CITE], A&A, 341, 241), which provided the basis for the EASE scenario. This scenario postulates that field metal-poor stars were born in self-enriched proto-globular cluster clouds. By further investigating the correlations between the different α-element abundances, we propose a modified scenario for the formation of intermediate metallicity stars, in which the stars exhibiting lower than average α/Fe abundance ratios would form in low mass clouds, unable to sustain the formation of very massive stars (M ⪆ 30~M_&sun;). Moreover, the carbon-to-iron ratio is found to decrease as one climbs the so-called Population IIb branch, i.e. when the s-element abundance increases. In the framework of the EASE scenario, we interpret this anticorrelation between the carbon and the s-element abundances as a signature of a hot bottom burning process in the metal-poor AGB stars which expelled the matter subsequently accreted by our Population IIb stars.
Based on observations collected at the European Southern Observatory, La Silla, Chile (ESO Programmes 56.E-0384, 57.E-0400 and 59.E-0257).

Affiliated with

Also associated with

No associations

Rating

Abundance correlations in mildly metal-poor stars. II. Light elements (C to Ca) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Abundance correlations in mildly metal-poor stars. II. Light elements (C to Ca), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abundance correlations in mildly metal-poor stars. II. Light elements (C to Ca) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1451863