Star formation in molecular cores
III. The effect of the turbulent power spectrum
Dept. of Physics & Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3YB, Wales, UK e-mail: Simon.Goodwin@astro.cf.ac.uk
Received:
10
August
2005
Accepted:
2
February
2006
We investigate the effect of the turbulent power spectrum (
, with 
) on the fragmentation of low-mass
cores, by means of SPH simulations. We adopt initial density profiles and
low levels of turbulence based on observation, and for each n-value we
conduct an ensemble of simulations with different initial seeds for the
turbulent velocity field, so as to obtain reasonable statistics. We find
that when power is concentrated at larger scales (i.e. for larger n),
more protostellar objects form and there is a higher proportion of low-mass
stars and brown dwarfs. This is in direct contrast with the recent results
of Delgado Donate et al., presumably because they adopted much higher
levels of turbulence.
Key words: stars: formation
© ESO, 2006