Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541418u&link_type=abstract
American Astronomical Society, AAS Meeting #215, #414.18; Bulletin of the American Astronomical Society, Vol. 42, p.257
Astronomy and Astrophysics
Astronomy
Scientific paper
We investigate the effect of high and variable accretion rates on the early evolutionary stages of young stars. A high accretion rate has been proposed as an important ingredient in the formation of a massive star and simulations of clustered star-forming environments have shown that accretion is highly variable. Comparing accreting with non-accreting tracks shows substantial differences in the evolution of a young star in the H-R diagram. We find that once accretion is over, for a given stellar mass, the evolution within the H-R diagram is largely independent of the accretion history. However, the pre-main-sequence stellar age strongly depends on the accretion history, even after accretion has stopped. Including a realistic accretion rate, from cluster-scale simulations, shows that the evolution in the H-R diagram is more complicated than what a simple non-accreting track would predict.
Urban Andrea
Yorke Harold W.
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