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    The accretion-ejection coupling in the black hole candidate X-ray binary MAXI J1836-194

    198276_198276.pdf (818.7Kb)
    Access Status
    Open access
    Authors
    Russell, Thomas
    Soria, Roberto
    Miller-Jones, James
    Curran, Peter
    Markoff, S.
    Russell, D.
    Sivakoff, G.
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Russell, T.D. and Soria, R. and Miller-Jones, J.C.A. and Curran, P.A. and Markoff, S. and Russell, D.M. and Sivakoff, G.R. 2014. The accretion-ejection coupling in the black hole candidate X-ray binary MAXI J1836-194. Monthly Notices of the Royal Astronomical Society. 439 (2): pp. 1390-1402.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/stt2498
    ISSN
    0035-8711
    Remarks

    This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2014 The Authors. Published by Oxford University Press, on behalf of Royal Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/20354
    Collection
    • Curtin Research Publications
    Abstract

    We present the results of our quasi-simultaneous radio, submm, infrared, optical and X-ray study of the Galactic black hole candidate X-ray binary MAXI J1836-194 during its 2011 outburst. We consider the full multiwavelength spectral evolution of the outburst, investigating whether the evolution of the jet spectral break (the transition between optically thick and optically thin synchrotron emission) is caused by any specific properties of the accretion flow. Our observations show that the break does not scale with the X-ray luminosity or with the inner radius of the accretion disc, and is instead likely to be set by much more complex processes. We find that the radius of the acceleration zone at the base of the jet decreases from ˜106 gravitational radii during the hard intermediate state to ˜103 gravitational radii as the outburst fades (assuming a black hole mass of 8 M?), demonstrating that the electrons are accelerated on much larger scales than the radius of the inner accretion disc and that the jet properties change significantly during outburst. From our broad-band modelling and high-resolution optical spectra, we argue that early in the outburst, the high-energy synchrotron cooling break was located in the optical band, between ˜3.2 × 10^14 and 4.5 × 10^14 Hz. We calculate that the jet has a total radiative power of ˜3.1 × 10^36 erg s-1, which is ˜6 per cent of the bolometric radiative luminosity at this time. We discuss how this cooling break may evolve during the outburst, and how that evolution dictates the total jet radiative power. Assuming the source is a stellar mass black hole with canonical state transitions, from the measured flux and peak temperature of the disc component we constrain the source distance to be 4-10 kpc.

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