Journal Article

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

Adrian T. Potter, Christopher A. Tout and Ines Brott

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 423, issue 2, pages 1221-1233
Published in print June 2012 | ISSN: 0035-8711
Published online June 2012 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2012.20952.x
Towards a unified model of stellar rotation – II. Model-dependent characteristics of stellar populations

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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.

Keywords: stars: abundances; stars: chemically peculiar; stars: evolution; stars: general; stars: rotation

Journal Article.  7577 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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