A5093446485- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Geophysics and Gravity Measurements
- Gamma-ray bursts and supernovae
- Geomagnetism and Paleomagnetism Studies
- Nuclear physics research studies
University of Geneva
2023
Context. The first stars might have been fast rotators. This would important consequences for their radiative, mechanical, and chemical feedback. Aims. We discuss the impact of initial rotation on evolution massive Population III models nitrogen oxygen stellar yields. Methods. explore with masses in range 9 M ⊙ ≤ ini 120 , starting an zero-age main sequence equal to 70% critical one. Results. find that physics considered here, our rapidly rotating do not follow a homogeneous evolution. They...
Context. Grids of stellar evolution models with rotation using the Geneva code (G ENEC ) have been published for a wide range metallicities. Aims. We introduce last remaining grid G models, metallicity Z = 10 −5 . study impact this extremely metal-poor initial composition on various aspects evolution, and compare it to results from previous grids at other provide electronic tables that can be used interpolate between tracks population synthesis. Methods. Using same physics as in papers...
Binary evolution codes are essential tools to help in understanding the of binary systems. They contain a great deal physics, for example stellar evolution, interactions, mass transfer, tides, orbital evolution. Since many these processes difficult account detail, we often rely on prescriptions obtained earlier studies. We highlight that impact dynamical tides with radiative damping has been implemented inconsistently respect its original theoretical formulation derive new analytical...
The first stars might have been fast rotators. This would important consequences for their radiative, mechanical and chemical feedback. We discuss the impact of initial rotation on evolution massive Population III models nitrogen oxygen stellar yields. explore with masses in range 9Msol < Mini 120Msol starting an Zero Age Main Sequence equal to 70% critical one. find that physics considered here, our rapidly-rotating do not follow a homogeneous evolution. They lose very little mass case...
Grids of stellar evolution models with rotation using the Geneva code (Genec) have been published for a wide range metallicities. We introduce last remaining grid Genec models, metallicity $Z=10^{-5}$. study impact this extremely metal-poor initial composition on various aspects evolution, and compare it to results from previous grids at other provide electronic tables that can be used interpolate between tracks population synthesis. Using same physics as in papers series, we computed...
Stars with initial mass above roughly 8 $M_ odot $ will evolve to form a core made of iron group elements, at which point no further exothermic nuclear reactions between charged nuclei may prevent the collapse. Electron capture, neutrino losses, and photo-disintegration heavy trigger collapse these stars. Models brink are produced using stellar evolution codes, pre-collapse models be used in study subsequent dynamical (including their explosion as supernovae formation compact remnants such...
Binary evolution codes are essential tools to help in understanding the of binary systems. They contain a great deal physics, for example stellar evolution, interactions, mass transfer, tides, orbital evolution. Since many these processes difficult account detail, we often rely on prescriptions obtained earlier studies. We highlight that impact dynamical tides with radiative damping has been implemented inconsistently respect its original theoretical formulation derive new analytical...