Influence of rotation and magnetic field on the minimum mass of a main-sequence star

Astronomy and Astrophysics – Astronomy

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Electron Gas, Main Sequence Stars, Stellar Gravitation, Stellar Magnetic Fields, Stellar Mass, Stellar Rotation, Angular Momentum, Chemical Composition, Equations Of State, Hertzsprung-Russell Diagram, Nonuniform Magnetic Fields, Poloidal Flux, Stellar Evolution

Scientific paper

The present study examines the influence of rigid-body and differential rotation and of a fine-scale chaotic magnetic field and a poloidal magnetic field on the minimum mass of a main sequence star. Calculations are performed with allowance for two main effects in the equation of state: ionization and dissociation by pressure and the partial degeneracy of the electron gas. It is shown that rotation and a magnetic field with an energy equal to 10-20% of the star's gravitational energy increase the minimum mass of a main sequence star by 1.5-2 times.

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