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    Discovery of radio emission from the symbiotic X-ray binary system GX 1+4

    265470.pdf (289.8Kb)
    Access Status
    Open access
    Authors
    Van den Eijnden, J.
    Degenaar, N.
    Russell, T.
    Miller-Jones, James
    Wijnands, R.
    Miller, J.
    King, A.
    Rupen, M.
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Van den Eijnden, J. and Degenaar, N. and Russell, T. and Miller-Jones, J. and Wijnands, R. and Miller, J. and King, A. et al. 2018. Discovery of radio emission from the symbiotic X-ray binary system GX 1+4. Monthly Notices of the Royal Astronomical Society: Letters. 474 (1): pp. L91-L95.
    Source Title
    Monthly Notices of the Royal Astronomical Society: Letters
    DOI
    10.1093/mnrasl/slx181
    ISSN
    1745-3925
    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/20.500.11937/67979
    Collection
    • Curtin Research Publications
    Abstract

    We report the discovery of radio emission from the accreting X-ray pulsar and symbiotic X-ray binary GX 1+4 with the Karl G. Jansky Very Large Array. This is the first radio detection of such a system, wherein a strongly magnetized neutron star accretes from the stellar wind of an M-type giant companion. We measure a 9 GHz radio flux density of 105.3 ± 7.3 μJy, but cannot place meaningful constraints on the spectral index due to a limited frequency range. We consider several emission mechanisms that could be responsible for the observed radio source. We conclude that the observed properties are consistent with shocks in the interaction of the accretion flow with the magnetosphere, a synchrotron-emitting jet, or a propeller-driven outflow. The stellar wind from the companion is unlikely to be the origin of the radio emission. If the detected radio emission originates from a jet, it would show that strong magnetic fields (≥1012 G) do not necessarily suppress jet formation.

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