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Title:
The distribution of ejected brown dwarfs in clusters
Authors:
Goodwin, S. P.; Hubber, D. A.; Moraux, E.; Whitworth, A. P.
Affiliation:
AA(School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3YB, UK), AB(School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3YB, UK), AC(Insititute of Astronomy, Madingley Road, Cambridge, CB, UK), AD(School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3YB, UK)
Publication:
Astronomische Nachrichten, Vol.326, Issue 10, p.1040-1043 (AN Homepage)
Publication Date:
12/2005
Origin:
AN
Keywords:
stars: formation, binaries: general, stars: low-mass, brown dwarfs
DOI:
10.1002/asna.200510469
Bibliographic Code:
2005AN....326.1040G

Abstract

We examine the spatial distribution of brown dwarfs produced by the decay of small-N stellar systems as expected from the embryo ejection scenario. We model a cluster of several hundred stars grouped into 'cores' of a few stars/brown dwarfs. These cores decay, preferentially ejecting their lowest-mass members. Brown dwarfs are found to have a wider spatial distribution than stars, however once the effects of limited survey areas and unresolved binaries are taken into account it can be difficult to distinguish between clusters with many or no ejections. A large difference between the distributions probably indicates that ejections have occurred, however similar distributions sometimes arise even with ejections. Thus the spatial distribution of brown dwarfs is not necessarily a good discriminator between ejection and non-ejection scenarios.
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