English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The first massive stars triggered the onset of chemical evolution byreleasing the first metals (elements heavier than helium) in the Universe. Thenature of these stars and how the early chemical enrichment took place is stilllargely unknown. Rotational-induced mixing in the stellar interior can impactthe nucleosynthesis during the stellar life of massive stars and lead tostellar ejecta having various chemical compositions. We present low andzero-metallicity 20, 25 and 40 $M_{\odot}$ stellar models with various initialrotation rates and assumptions for the nuclear reactions rates. With increasinginitial rotation, the yields of light (from $\sim$ C to Al) and trans-ironelements are boosted. The trans-iron elements (especially elements heavier thanBa) are significantly affected by the nuclear reaction uncertainties. Thechemical composition of the observed CEMP (carbon-enhanced metal-poor) starsCS29528-028 and HE0336+0113 are consistent with the chemical composition of thematerial ejected by a fast rotating 40~$M_{\odot}$ model.

Nucleosynthesis in early rotating massive stars and chemical composition of CEMP stars