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

We review some important observed properties of massive stars. Then wediscuss how mass loss and rotation affect their evolution and help in givingbetter fits to observational constraints. Consequences for nucleosynthesis atdifferent metallicities are discussed. Mass loss appear to be the key featureat high metallicity, while rotation is likely dominant at low and very lowmetallicities. We discuss various indications supporting the view that verymetal poor stars had their evolution strongly affected by rotational mixing.Many features, like the origin of primary nitrogen at low metallicity, that ofthe C-rich extremely metal poor halo stars, of He-rich stars in massiveglobular clusters, of the O-Na anticorrelation in globular clusters may berelated to the existence of a population of very fast rotating metal poor starsthat we tentatively call the {\it spinstars}. A fraction of these {\itspinstars} may also be the progenitors of GRB in very metal poor regions. Theymay avoid pair instability explosion due to the heavy mass loss undergoneduring their early evolutionary phases and be, dependent on their frequency,important sources of ionising photons in the early Universe.

Nucleosynthesis from massive stars 50 years after B2FH