Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980azh....57.1105f&link_type=abstract
(Astronomicheskii Zhurnal, vol. 57, Sept.-Oct. 1980, p. 1105-1107.) Soviet Astronomy, vol. 24, Sept.-Oct. 1980, p. 635-637. Tra
Astronomy and Astrophysics
Astronomy
Gravitational Effects, Molecular Clouds, Star Clusters, Stellar Evolution, Stellar Mass Accretion, Contraction, Late Stars, Main Sequence Stars, Protostars, Stellar Mass
Scientific paper
Results are presented for a numerical study of the evolution of a star that has an initial mass of 0.05 solar mass, accretes protocluster cloud material at the rate of 10 to the -7th solar mass/yr during the gravitational contraction stage, and completes its evolution with a final mass of either 0.5 or one solar mass. The study shows that, owing to the effects of accretion on the internal structure of a star during gravitational contraction, stars with a mass of 0.5 or one solar mass may lie below the main sequence by 1-1.5 mag or by 0.25 mag, respectively. It is suggested that the presence of late-type stars below the main sequence in HR diagrams of young clusters may be explained in terms of accretion of protocluster cloud material during the gravitational contraction stage.
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