The distribution of ejected brown dwarfs in clusters

Details The distribution of ejected brown dwarfs in clusters The distribution of ejected brown dwarfs in clusters

2006-01-12

arxiv.org/abs/astro-ph/0601263v1

Astron.Nachr. 326 (2005) 1040-1043

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures. Includes an.sty file

Scientific paper

10.1002/asna.200510469

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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