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Brown dwarf jets: Investigating the universality of jet launching mechanisms at the lowest masses

Published online by Cambridge University Press:  24 February 2011

Emma Teresa Whelan ,
Francesca Bacciotti ,
Tom Ray  and
Catherine Dougados
Emma Teresa Whelan
Affiliation:
Laboratoire d'Astrophysique de Grenoble, UMR 5571, BP 53, 38041 Grenoble Cedex 09, France email: whelane@obs.ujf-grenoble.fr
Francesca Bacciotti
Affiliation:
INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy, Box 515, SE-75120 Uppsala, Sweden email: fran@arcetri.astro.it
Tom Ray
Affiliation:
Dublin Institute for Advanced Studies, Ireland email: tr@cp.dias.ie
Catherine Dougados
Affiliation:
Laboratoire d'Astrophysique de Grenoble, UMR 5571, BP 53, 38041 Grenoble Cedex 09, France email: whelane@obs.ujf-grenoble.fr
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Abstract

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Recently it has become apparent that proto-stellar-like outflow activity extends to the brown dwarf (BD) mass regime. While the presence of accretion appears to be the common ingredient in all objects known to drive jets fundamental questions remain unanswered. The more prominent being the exact mechanism by which jets are launched, and whether this mechanism remains universal among such a diversity of sources and scales. To address these questions we have been investigating outflow activity in a sample of protostellar objects that differ considerably in mass and mass accretion rate. Central to this is our study of brown dwarf jets. To date Classical T Tauri stars (CTTS) have offered us the best touchstone for decoding the launching mechanism. Here we shall summarise what is understood so far of BD jets and the important constraints observations can place on models. We will focus on the comparison between jets driven by objects with central mass <0.1M⊙ and those driven by CTTSs. In particular we wish to understand how the the ratio of the mass outflow to accretion rate compares to what has been measured for CTTSs.

Keywords

stars: low-massbrown dwarfsmass lossISM: jets and outflows
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S275: Jets at all Scales , September 2010 , pp. 396 - 399
Copyright
Copyright © International Astronomical Union 2011

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