Star formation in molecular cores

Goodwin, S.A., Whitworth, Anthony Peter ORCID: https://orcid.org/0000-0002-1178-5486 and Ward-Thompson, Derek ORCID: https://orcid.org/0000-0003-1140-2761 2006. Star formation in molecular cores. Astronomy & Astrophysics 452 (2) , pp. 487-492. 10.1051/0004-6361:20054026

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Abstract

We investigate the effect of the turbulent power spectrum ( $P(k) \propto k^{-n}$, with $n = 3,\,4\;{\rm or}\;5$) 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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	stars: formation
Additional Information:	Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0004-6361/ (accessed 16/04/2014)
Publisher:	EDP Sciences
ISSN:	0004-6361
Date of First Compliant Deposit:	30 March 2016
Last Modified:	17 May 2023 10:07
URI:	https://orca.cardiff.ac.uk/id/eprint/46503

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