{"paper":{"title":"Evolution of Massive Stars along the Cosmic History","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Andre Maeder, Cristina Chiappini, Cyril Georgy, Georges Meynet, Sylvia Ekstrom","submitted_at":"2009-01-28T16:08:15Z","abstract_excerpt":"Massive stars are \"cosmic engines\" (cf the title of the IAU Symposium 250). They drive the photometric and chemical evolution of galaxies, inject energy and momentum through stellar winds and supernova explosions, they modify in this way the physical state of the interstellar gas and have an impact on star formation. The evolution of massive stars depends sensitively on the metallicity which has an impact on the intensity of the line driven stellar winds and on rotational mixing. We can distinguish four metallicity regimes: 1.- the Pop III regime $0 \\le Z < \\sim 10^{-10}$; 2.- The low metallic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.4489","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}