Towards a unified model of stellar rotation II: Model-dependent characteristics of stellar populations

Abstract

Rotation has a number of important effects on the evolution of stars. Apart from structural changes because of the centrifugal force, turbulent mixing and meridional circulation caused by rotation can dramatically affect a star's chemical evolution. This leads to changes in the surface temperature and luminosity as well as modifying its lifetime. Observationally rotation decreases the surface gravity, causes enhanced mass loss and leads to surface abundance anomalies of various chemical isotopes. The replication of these physical effects with simple stellar evolution models is very difficult and has resulted in the use of numerous different formulations to describe the physics. Using stellar evolution calculations based on several physical models we discuss the features of the resulting simulated stellar populations which can help to distinguish between the models.

14 pages, 13 figures. Accepted for publication in MNRAS

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• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• The VLT-FLAMES Tarantula Survey X: Evidence for a bimodal distribution of rotational velocities for the single early B-type stars
• Turbulent transport in radiative zones of stars
• Shear mixing in stellar radiative zones - II. Robustness of numerical simulations
• Shear mixing in stellar radiative zones I. Effect of thermal diffusion and chemical stratification
• The VLT-FLAMES Tarantula Survey: XXVIII. Nitrogen abundances for apparently single dwarf and giant B-type stars with small projected rotational velocities
• How much mass and angular momentum can the progenitors of carbon-enriched stars accrete?
• Rotation and magnetism in intermediate mass stars
• A versatile numerical method for obtaining structures of rapidly rotating baroclinic stars: self-consistent and systematic solutions with shellular-type rotation
• Rotational mixing in carbon-enhanced metal-poor stars with s-process enrichment
• Rotational equilibria by Lagrangian variational principle: toward multi-dimensional stellar evolutions