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    Probing outflow activity in very low mass stars and brown dwarfs


    Whelan, Emma and Ray, T.P. and Bacciotti, F. and Jayawardhana, R. (2006) Probing outflow activity in very low mass stars and brown dwarfs. New Astronomy Reviews, 49 (10-12). pp. 582-589. ISSN 1387-6473

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    Abstract

    The discovery that newborn very low mass stars and brown dwarfs have optical forbidden line spectra similar to low mass young stars was a strong indication that these objects can also launch outflows. Forbidden lines are the traditional tracers of outflow activity in young stars and observations at these wavelengths have contributed much to the understanding of outflows. However in the case of brown dwarfs, the forbidden emission line regions observed are not well resolved spatially. Thus, their origin in an outflow could not be confirmed. Here, the technique of spectro-astrometry as a means of spatially probing the forbidden emission line regions of very low mass stars and brown dwarfs is introduced. Indeed spectro-astrometric data presented here demonstrates, for the first time, that young brown dwarfs that are actively accreting can drive outflows. Also discussed is the important role adaptive optics will play when it comes to spatially resolving the forbidden emission line regions of sub-stellar objects and the potential for developing spectro-astrometry to a 2D form through integral field spectroscopy.

    Item Type: Article
    Additional Information: The present work was supported in part by the European Community's Marie Curie Actions – Human Resource and Mobility within the JETSET (Jet Simulations, Experiments and Theory) network under contract MRTN-CT-2004 005592.
    Keywords: outflow activity; very low mass stars; brown dwarfs;
    Academic Unit: Faculty of Science and Engineering > Experimental Physics
    Item ID: 9937
    Identification Number: https://doi.org/10.1016/j.newar.2005.10.011
    Depositing User: Emma Whelan
    Date Deposited: 17 Sep 2018 16:03
    Journal or Publication Title: New Astronomy Reviews
    Publisher: Elsevier
    Refereed: Yes
    Funders: European Community Marie Curie Actions
    URI:

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