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Outflow activity in brown dwarfs

Published online by Cambridge University Press:  01 May 2007

Emma T. Whelan ,
Thomas P. Ray ,
Francesca Bacciotti ,
Sofia Randich ,
Ray Jayawardhana ,
Antonella Natta ,
Leonardo Testi  and
Subu Mohanty
Emma T. Whelan
Affiliation:
Dublin Institute for Advanced Studies email: [email protected]
Thomas P. Ray
Affiliation:
Dublin Institute for Advanced Studies email: [email protected]
Francesca Bacciotti
Affiliation:
Osservatorio Astrofisico di Arcetri
Sofia Randich
Affiliation:
Osservatorio Astrofisico di Arcetri
Ray Jayawardhana
Affiliation:
Department of Astronomy and Astrophysics, University of Toronto
Antonella Natta
Affiliation:
Osservatorio Astrofisico di Arcetri
Leonardo Testi
Affiliation:
Osservatorio Astrofisico di Arcetri
Subu Mohanty
Affiliation:
Harvard-Smithsonian Center for Astrophysics
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Abstract

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While numerous studies have been aimed at understanding the properties of young brown dwarfs relatively little exploration of their potential as drivers of outflows has occurred. Forbidden emission lines are important probes of outflows from young stellar objects, as they trace the shocks which form as an outflow interacts with the ambient medium of its driving source. While forbidden emission was identified in the spectra of young brown dwarfs, indicating the presence of outflows, these lines were weak and confined to the brown dwarf continuum position. Hence their origin in an outflow could not be confirmed. Our approach to this problem, is to analyse the forbidden line regions of brown dwarfs using spectro-astrometry. Spectro-astrometry is a novel technique which allows the user to recover spatial information from a spectrum beyond the limitations of the seeing of the observation. Using this technique we have found two brown dwarf outflows to date. In this chapter we outline this technique, describe our results for the brown dwarfs ρ-Oph 102 and 2MASS1207-3932 and discuss our future plans.

Keywords

2MASSWJ1207334-393254stars: low massbrown dwarfsstars: formationISM: jets and outflows
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S243: Star-Disk Interaction in Young Stars , May 2007 , pp. 357 - 364
Copyright
Copyright © International Astronomical Union 2007

References

Allers, K. N., et al. 2007, The Astrophysical Journal, 657, 511CrossRefGoogle Scholar
Bailey, J. A. 1998, SPIE–The International Society for Optical Engineering, 3355, 932Google Scholar
Briceño, C., Hartmann, L., Stauffer, J., & Martín, E. 1998, The Astronomical Journal, 115, 2074CrossRefGoogle Scholar
Brannigan, E., Takami, M., Chrysostomou, A., & Bailey, J. 2006, Monthly Notices of the Royal Astronomical Society, 367, 315CrossRefGoogle Scholar
Fernández, M., & Comerón, F. 2001, Astronomy and Astrophysics, 380, 264CrossRefGoogle Scholar
Grosso, N., et al. 2007, Astronomy and Astrophysics, 468, 391CrossRefGoogle Scholar
Hartigan, P., Morse, J. A., & Raymond, J. 1994, The Astrophysical Journal, 436, 125CrossRefGoogle Scholar
Jayawardhana, R., Ardila, D. R., Stelzer, B., & Haisch, K. E. Jr., 2003a, The Astronomical Journal, 126, 1515CrossRefGoogle Scholar
Jayawardhana, R., Mohanty, S., & Basri, G. 2003b, The Astrophysical Journal, 592, 282CrossRefGoogle Scholar
Königl, A., & Pudritz, R. E. 2000, Protostars and Planets IV, 759Google Scholar
Lucas, P. W. & Roche, P. F. 2000, Monthly Notices of the Royal Astronomical Society, 314, 858CrossRefGoogle Scholar
Luhman, K. L., Briceño, C., Stauffer, J. R., Hartmann, L., Barradoy Navascués, D. y Navascués, D., & Caldwell, , 2003, The Astrophysical Journal, 590, 348CrossRefGoogle Scholar
Mohanty, S., Jayawardhana, R., & Barradoy Navascués, D. y Navascués, D. 2003, The Astrophysical Journal Letters, 593, L109CrossRefGoogle Scholar
Mohanty, S., Jayawardhana, R., & Basri, G. 2005, The Astrophysical Journal, 626, 498CrossRefGoogle Scholar
Muzerolle, J., Hillenbrand, L., Calvet, N., Briceño, C., & Hartmann, L. 2003, The Astrophysical Journal, 592, 266CrossRefGoogle Scholar
Muzerolle, J., Luhman, K. L., Briceño, C., Hartmann, L., & Calvet, N. 2005, The Astrophysical Journal, 625, 906CrossRefGoogle Scholar
Natta, A., Testi, L., Comerón, F., Oliva, E., D'Antona, F., Baffa, C., Comoretto, G., Gennari, S. 2002, Astronomy and Astrophysics, 393, 597CrossRefGoogle Scholar
Natta, A., Testi, L., Muzerolle, J., Randich, S., Comerón, F., & Persi, P. 2004, Astronomy and Astrophysics, 424, 603CrossRefGoogle Scholar
Scholz, A., & Jayawardhana, R. 2006, The Astrophysical Journal, 638, 1056CrossRefGoogle Scholar
Whelan, E. T., Ray, T. P., & Davis, C. J. 2004, Astronomy and Astrophysics, 417, 247CrossRefGoogle Scholar
Whelan, E. T., Ray, T. P., Bacciotti, F., Natta, A., Testi, L., & Randich, S. 2005, Nature, 435, 652CrossRefGoogle Scholar
Whelan, E. T., Ray, T. P., Randich, S., Bacciotti, F., Jayawardhana, R., Testi, L., Natta, A., Mohanty, S. 2007, The Astrophysical Journal Letters, 659, L45CrossRefGoogle Scholar
Wilking, B. A., Greene, T. P., & Meyer, M. R. 1999, The Astronomical Journal, 117, 469CrossRefGoogle Scholar