Evolution of Stars with High Metallicities

Details Evolution of Stars with High Metallicities Evolution of Stars with High Metallicities

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001arep...45..882t&link_type=abstract

Astronomy Reports, Volume 45, Issue 11, November 2001, pp.882-887

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We have calculated evolutionary tracks for stars with high abundances of heavy elements. An abundance increase from the solar level (˜0.02) to 0.1 (for ΔY/ΔZ=0 2.4), which corresponds to the central regions of the disk components of giant galaxies, shifts the main sequence towards lower effective temperatures; however, it does not appreciably affect either the luminosity of the stars or their lifetime on the main sequence. Increasing the heavy-element abundance to 0.2 for ΔY/ΔZ=2.4 shifts the main sequence towards higher effective temperatures, appreciably increases the luminosity of the stars, and substantially accelerates their evolution.

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