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Title:
The formation of brown dwarfs
Authors:
Whitworth, A. P.; Goodwin, S. P.
Affiliation:
AA(School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff CF24 3YB, Wales, UK), AB(School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff CF24 3YB, Wales, UK)
Publication:
Astronomische Nachrichten, Vol.326, Issue 10, p.899-904 (AN Homepage)
Publication Date:
12/2005
Origin:
AN
Keywords:
stars: formation, stars: brown dwarfs
DOI:
10.1002/asna.200510447
Bibliographic Code:
2005AN....326..899W

Abstract

We review four mechanisms for forming brown dwarfs: (i) turbulent fragmentation (producing very low-mass prestellar cores); (ii) gravitational instabilities in discs; (iii) dynamical ejection of stellar embryos from their placental cores; and (iv) photo-erosion of pre-existing cores in HII regions. We argue (a) that these are simply the mechanisms of low-mass star formation, and (b) that they are not mutually exclusive. If, as seems possible, all four mechanisms operate in nature, their relative importance may eventually be constrained by their ability to reproduce the binary statistics of brown dwarfs, but this will require fully 3-D radiative magneto-hydrodynamic simulations.
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