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    Disc-jet coupling in low-luminosity accreting neutron stars

    253579.pdf (995.2Kb)
    Access Status
    Open access
    Authors
    Tudor, V.
    Miller-Jones, James
    Patruno, A.
    D'Angelo, C.
    Jonker, P.
    Russell, D.
    Russell, T.
    Bernardini, F.
    Lewis, F.
    Deller, A.
    Hessels, J.
    Migliari, S.
    Plotkin, Richard
    Soria, Roberto
    Wijnands, R.
    Date
    2017
    Collection
    • Curtin Research Publications
    Type
    Journal Article
    Metadata
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    Abstract

    In outburst, neutron star X-ray binaries produce less powerful jets than black holes at a given X-ray luminosity. This has made them more difficult to study as they fade towards quiescence. To explore whether neutron stars power jets at low accretion rates (L X ? 10 36 erg s -1 ), we investigate the radio and X-ray properties of three accreting millisecond X-ray pulsars (IGR J17511-3057, SAX J1808.4-3658 and IGR J00291+5934) during their outbursts in 2015, and of the non-pulsing neutron starCenX-4 in quiescence (2015) and in outburst (1979). We did not detect the radio counterpart of IGR J17511-3057 in outburst or of Cen X-4 in quiescence, but did detect IGR J00291+5934 and SAX J1808.4-3658, showing that at least some neutron stars launch jets at low accretion rates. While the radio and X-ray emission in IGR J00291+5934 seem to be tightly correlated, the relationship in SAX J1808.4-3658 is more complicated.We find that SAX J1808.4-3658 produces jets during the reflaring tail, and we explore a toy model to ascertain whether the radio emission could be attributed to the onset of a strong propeller. The lack of a universal radio/X-ray correlation, with different behaviours in different neutron star systems (with various radio/X-ray correlations; some being radio faint and others not), points at distinct disc-jet interactions in individual sources, while always being fainter in the radio band than black holes at the same X-ray luminosity.

    Citation
    Tudor, V. and Miller-Jones, J. and Patruno, A. and D'Angelo, C. and Jonker, P. and Russell, D. and Russell, T. et al. 2017. Disc-jet coupling in low-luminosity accreting neutron stars. Monthly Notices of the Royal Astronomical Society. 470 (1): pp. 324-339.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    URI
    http://hdl.handle.net/20.500.11937/54333
    DOI
    10.1093/mnras/stx1168
    Department
    Department of Physics and Astronomy
    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.

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