The dependence of star formation on initial conditions and molecular cloud structure
The dependence of star formation on initial conditions and molecular cloud structure
复制标题
恒星形成对初始条件和分子云结构的依赖性
DOI:
10.1111/j.1365-2966.2009.14970.x
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发表时间:
2009
影响因子:
4.8
通讯作者:
Bate M
中科院分区:
文献类型:
--
作者:
Bate M
We investigate the dependence of stellar properties on the initial kinematic structure of the gas in star-forming molecular clouds. We compare the results from two large-scale hydrodynamical simulations of star cluster formation that resolve the fragmentation process down to the opacity limit, the first of which was reported by Bate, Bonnell & Bromm. The initial conditions of the two calculations are identical, but in the new simulation the power spectrum of the velocity field imposed on the cloud initially and allowed to decay is biased in favour of large-scale motions. Whereas the calculation of Bate et al. began with a power spectrumP(k) ∝k−4to match the Larson scaling relations for the turbulent motions observed in molecular clouds, the new calculation begins with a power spectrumP(k) ∝k−6.Despite this change to the initial motions in the cloud and the resulting density structure of the molecular cloud, the stellar properties resulting from the two calculations are indistinguishable. This demonstrates that the results of such hydrodynamical calculations of star cluster formation are relatively insensitive to the initial conditions. It is also consistent with the fact that the statistical properties of stars and brown dwarfs (e.g. the stellar initial mass function) are observed to be relatively invariant within our Galaxy and do not appear to depend on environment.
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DOI:
10.1111/j.1365-2966.2004.07377.x
发表时间:
2003
影响因子:
4.8
作者:
P. Clark;I. Bonnell
通讯作者:
I. Bonnell
DOI:
10.1111/j.1365-2966.2005.09105.x
发表时间:
2005
影响因子:
4.8
作者:
P. Clark;I. Bonnell
通讯作者:
I. Bonnell
DOI:
10.1086/339795
发表时间:
2002
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
L. Close;N. Siegler;D. Potter;W. Brandner;J. Liebert
通讯作者:
J. Liebert
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
M. Bate;I. Bonnell;V. Bromm
通讯作者:
V. Bromm
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
L. Close;B. Zuckerman;I. Song;T. Barman;C. Marois;E. Rice;N. Siegler;B. Macintosh;E. Becklin;R. Campbell;J. Lyke;A. Conrad;D. L. Mignant
通讯作者:
D. L. Mignant