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How do brown dwarves form?

Whitworth, Anthony Peter and Goodwin, S. P. 2005. How do brown dwarves form? Presented at: Low-mass stars and brown dwarfs: IMF, accretion and activity, Volterra, Italy, 17-20 October 2004. Published in: Testi, Leonardo and Natta, Antonella eds. Low-mass Stars and Brown Dwarfs: IMF, Accretion and Activity: Volterra, October 17 - 20, 2004 ; [Workshop "Low-mass Stars and Brown Dwarfs: IMF, Accretion and Activity]. Memorie della Società astronomica italiana , vol. 76 (2). Pisa, Italy: Italian Astronomical Society, pp. 211-216.

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Abstract

We review and evaluate four mechanisms for forming brown dwarves: (i) dynamical ejection of a stellar embryo from its placental prestellar core; (ii) opacity-limited fragmentation of a shock-compressed layer; (iii) gravitational instabilities in discs, triggered by impulsive interactions with other discs or naked stars; and (iv) photo-erosion of pre-existing cores. All these mechanisms can produce free-floating brown dwarves, but only (ii) and (iii) are likely to produce brown dwarves in multiple systems, and (i) has difficulty delivering brown dwarves with discs.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Star Formation - Brown Dwarves
Additional Information: http://sait.oat.ts.astro.it/MmSAI/76/PDF/211.pdf
Publisher: Italian Astronomical Society
ISSN: 0037-8720
Related URLs:
Last Modified: 04 Jun 2017 08:03
URI: http://orca.cf.ac.uk/id/eprint/72303

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