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    Resolved, expanding jets in the Galactic black hole candidate XTE J1908+094

    253580.pdf (1.833Mb)
    Access Status
    Open access
    Authors
    Rushton, A.
    Miller-Jones, J.
    Curran, P.
    Sivakoff, G.
    Rupen, M.
    Paragi, Z.
    Spencer, R.
    Yang, J.
    Altamirano, D.
    Belloni, T.
    Fender, R.
    Krimm, H.
    Maitra, D.
    Migliari, S.
    Russell, D.
    Russell, T.
    Soria, Roberto
    Tudose, V.
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Rushton, A. and Miller-Jones, J. and Curran, P. and Sivakoff, G. and Rupen, M. and Paragi, Z. and Spencer, R. et al. 2017. Resolved, expanding jets in the Galactic black hole candidate XTE J1908+094. Monthly Notices of the Royal Astronomical Society. 468 (3): pp. 2788-2802.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/stx526
    ISSN
    0035-8711
    School
    Curtin Institute of Radio Astronomy (Physics)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/FT140101082
    Remarks

    This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/54195
    Collection
    • Curtin Research Publications
    Abstract

    Black hole X-ray binaries undergo occasional outbursts caused by changing inner accretion flows. Here we report high angular resolution radio observations of the 2013 outburst of the black hole candidate X-ray binary system XTE J1908+094, using data from the Very Long Baseline Array and European VLBI Network. We show that following a hard-to-soft state transition, we detect moving jet knots that appear asymmetric in morphology and brightness, and expand to become laterally resolved as they move away from the core, along an axis aligned approximately −11° east of north. We initially see only the southern component, whose evolution gives rise to a 15-mJy radio flare and generates the observed radio polarization. This fades and becomes resolved out after 4 days, after which a second component appears to the north, moving in the opposite direction. From the timing of the appearance of the knots relative to the X-ray state transition, a 90° swing of the inferred magnetic field orientation, the asymmetric appearance of the knots, their complex and evolving morphology, and their low speeds, we interpret the knots as working surfaces where the jets impact the surrounding medium. This would imply a substantially denser environment surrounding XTE J1908+094 than has been inferred to exist around the microquasar sources GRS 1915+105 and GRO J1655−40.

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