Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-05-06
Astron.Astrophys. 423 (2004) 169-182
Astronomy and Astrophysics
Astrophysics
15 pages, 8 figures. In press in A&A
Scientific paper
10.1051/0004-6361:20040285
(Abridged) We explore, by means of a large ensemble of SPH simulations, how the level of turbulence affects the collapse and fragmentation of a star-forming core. All our simulated cores have the same, except that we vary (a) the initial level of turbulence (as measured by the ratio of turbulent to gravitational energy, $\alpha_{\rm turb} \equiv U_{\rm turb}/|\Omega| = 0, 0.01, 0.025, 0.05, 0.10 {\rm and} 0.25$) and (b), for fixed $\alpha_{\rm turb}$, the details of the initial turbulent velocity field (so as to obtain good statistics). A low level of turbulence ($\alpha_{\rm turb} \sim 0.05$) suffices to produce multiple systems. As $\alpha_{\rm turb}$ is increased, the number of objects formed and the companion frequency both increase. The mass function is bimodal, with a flat low-mass segment representing single objects ejected from the core before they can accrete much, and a Gaussian high-mass segment representing objects which because they remain in the core grow by accretion and tend to pair up in multiple systems.
Goodwin Simon P.
Ward-Thompson Derek
Whitworth Anthony P.
No associations
LandOfFree
Simulating star formation in molecular cores II. The effects of different levels of turbulence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Simulating star formation in molecular cores II. The effects of different levels of turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simulating star formation in molecular cores II. The effects of different levels of turbulence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-711811