50 citations · 193 across the 12 of their papers we have counts for
12 papers
The fate of rotating massive stars across cosmic times
R. Hirschi, K. Goodman, G. Meynet +9
The initial mass and metallicity of stars both have a strong impact on their fate. Stellar axial rotation also has a strong impact on the structure and evolution of massive stars.…
Fluorine production in He-burning regions of massive stars during cosmic history
Sophie Tsiatsiou, Georges Meynet, Eoin Farrell +11
The origin of fluorine is still a debated question. AGB stars synthesise this element and likely contribute significantly to its synthesis in the present-day Universe. However, it…
Effects of chemically homogeneous evolution of the first stars on the 21-cm signal and reionization
Boyuan Liu, Daniel Kessler, Thomas Gessey-Jones +6
The first generation of stars, known as Population III (Pop III), played a crucial role in the early Universe through their unique formation environment and metal-free composition.…
Signatures of Rapidly Rotating Stars with Chemically Homogeneous Evolution in the First Galaxies
Boyuan Liu, Yves Sibony, Georges Meynet +1
The James Webb Space Telescope (JWST) has revealed an unexpectedly high abundance of UV luminous galaxies at redshifts , challenging `standard' galaxy formation models…
Grids of stellar models with rotation VIII: Models from 1.7 to 500 at metallicity
Yves Sibony, Kendall G. Shepherd, Norhasliza Yusof +12
Grids of stellar evolution models with rotation using the Geneva stellar evolution code (Genec) have been published for a wide range of metallicities. We introduce the last remaini…
Fast-rotating massive Population~III stars as possible sources of extreme N-enrichment in high-redshift galaxies
Devesh Nandal, Yves Sibony, Sophie Tsiatsiou
We present an analysis of the chemical compositions in high-redshift galaxies, with a focus on the nitrogen-enhanced galaxies GN-z11 and CEERS-1019. We use stellar models of massiv…
Rapidly rotating Population III stellar models as a source of primary nitrogen
Sophie Tsiatsiou, Yves Sibony, Devesh Nandal +12
The first stars might have been fast rotators. This would have important consequences for their radiative, mechanical and chemical feedback. We discuss the impact of fast initial r…
The impact of convective criteria on the properties of massive stars
Yves Sibony, Cyril Georgy, Sylvia Ekström +1
We study the differences between models computed with Ledoux and Schwarzschild criteria on the internal structure, evolutionary track in the Hertzsprung-Russell diagram (HRD), life…
Impact of Population III homogeneous stellar evolution on early cosmic reionisation
Yves Sibony, Boyuan Liu, Charlotte Simmonds +2
Context: Population III (Pop III) stars may be fast rotating. An expected consequence of fast rotation is strong internal mixing that deeply affects their evolutionary tracks in th…
The rotation of planet-hosting stars
Yves Sibony, Ravit Helled, Robert Feldmann
Understanding the distribution of angular momentum during the formation of planetary systems is a key topic in astrophysics. Data from the and mis…
Grids of stellar models with rotation VII: Models from 0.8 to 300 M at super-solar metallicity (Z = 0.020)
Norhasliza Yusof, Raphael Hirschi, Patrick Eggenberger +11
We present a grid of stellar models at super-solar metallicity (Z = 0.020) extending the previous grids of Geneva models at solar and sub-solar metallicities. A metallicity of Z =…
Stellar winds and metal enrichment from fast-rotating Population III stars
Boyuan Liu, Yves Sibony, Georges Meynet +1
Stellar winds from fast-rotating Population III (Pop III) stars have long been suspected to make important contributions to early metal enrichment, as features in the nucleosynthes…