Evolution of very low-mass stars

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astrophysics, Dwarf Stars, Stellar Evolution, Hertzsprung-Russell Diagram, Stellar Mass, Stellar Models, Stellar Temperature, White Dwarf Stars

Scientific paper

Results of numerical calculations of the contraction phase of a very low-mass star are described. The calculations are based on the latest available equation of state. The results compare well with the observed properties of nearby stars (D is less than 22 pc) in the very faint end of the main sequence. From this work, five objects in the immediate neighborhood of the sun are indicated (from theoretical reasons) that are suggested to be candidates for black dwarfs rather than for hydrogen burning stars. These stars are roughly estimated to have masses of about 0.02 solar mass and to be younger than 25 million years.

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