期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 465, 期 1, 页码 105-110出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw2770
关键词
brown dwarfs; stars: formation; stars: low-mass; stars: luminosity function, mass function
资金
- Swinburne University
- Australian Government
- Australian Research Council [DP130102078, FT130100034]
- Australian Research Council [FT130100034] Funding Source: Australian Research Council
We test the hypothesis that the initial mass function (IMF) is determined by the density probability distribution function (PDF) produced by supersonic turbulence. We compare 14 simulations of star cluster formation in 50 M-circle dot molecular cloud cores where the initial turbulence contains either purely solenoidal or purely compressive modes, in each case resolving fragmentation to the opacity limit to determine the resultant IMF. We find statistically indistinguishable IMFs between the two sets of calculations, despite a factor of 2 difference in the star formation rate and in the standard deviation of log (rho). This suggests that the density PDF, while determining the star formation rate, is not the primary driver of the IMF.
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