A resolved outflow of matter from a brown dwarf

Emma T. Whelan (), Thomas P. Ray, Francesca Bacciotti, Antonella Natta, Leonardo Testi and Sofia Randich
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Emma T. Whelan: Dublin Institute for Advanced Studies
Thomas P. Ray: Dublin Institute for Advanced Studies
Francesca Bacciotti: Osservatorio Astrofisico di Arcetri, INAF
Antonella Natta: Osservatorio Astrofisico di Arcetri, INAF
Leonardo Testi: Osservatorio Astrofisico di Arcetri, INAF
Sofia Randich: Osservatorio Astrofisico di Arcetri, INAF

Nature, 2005, vol. 435, issue 7042, 652-654

Abstract: Brown dwarfs: star quality Brown dwarfs are intermediate in mass between normal stars and planets. Their mass is so low (less than 70 Jupiter masses) that a brown dwarf's core is too cool to ignite hydrogen, hence they are sometimes called ‘failed stars’. The birth of a normal star is accompanied by both accretion and expulsion of matter. There is growing evidence for small accretion disks around brown dwarfs, so the question arises: do brown dwarfs have outflows too? Whelan et al. show that they do, and that their outflows are miniature versions of those produced by T Tauri stars (precursors to stars like the Sun). This suggests that the outflow phenomenon is universal: it accompanies not only the formation of stars and brown dwarfs but perhaps even planets.

Date: 2005
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DOI: 10.1038/nature03598

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