Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 411, Issue 4, Pages 2230-2240Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2010.17844.x
Keywords
stars: formation; ISM: bubbles; H II regions
Categories
Funding
- European Commission [MRTN-CT-2006-035890]
- Academy of Sciences of the Czech Republic [AV0Z10030501]
- Centre for Theoretical Astrophysics of the Ministry of Education, Youth and Sports of the Czech Republic [LC06014]
- UK Science and Technology Facilities Council [ST/H001530/1]
- STFC [ST/H001530/1] Funding Source: UKRI
Ask authors/readers for more resources
We use smoothed particle hydrodynamics (SPH) simulations to investigate the gravitational fragmentation of expanding shells through the linear and non-linear regimes. The results are analysed using spherical-harmonic decomposition to capture the initiation of structure during the linear regime, the potential-based method of Smith et al. to follow the development of clumps in the mildly non-linear regime and sink particles to capture the properties of the final bound objects during the highly non-linear regime. In the early, mildly non-linear phase of fragmentation, we find that the clump mass function still agrees quite well with the mass function predicted by the analytic model. However, the sink mass function is quite different, in the sense of being skewed towards high-mass objects. This is because, once the growth of a condensation becomes non-linear, it tends to be growing non-competitively from its own essentially separate reservoir; we call this oligarchic accretion.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available