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    A Connection Between Plasma Conditions Near Black Hole Event Horizons And Outflow Properties

    235473_235473.pdf (818.5Kb)
    Access Status
    Open access
    Authors
    Koljonen, K.
    Russell, D.
    Fernández-Ontiveros, J.
    Markoff, S.
    Russell, T.
    Miller-Jones, James
    Van Der Horst, A.
    Bernardini, F.
    Casella, P.
    Curran, Peter
    Gandhi, P.
    Soria, Roberto
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Koljonen, K. and Russell, D. and Fernández-Ontiveros, J. and Markoff, S. and Russell, T. and Miller-Jones, J. and Van Der Horst, A. et al. 2015. A Connection Between Plasma Conditions Near Black Hole Event Horizons And Outflow Properties. Astrophysical Journal. 814: 139.
    Source Title
    Astrophysical Journal
    DOI
    10.1088/0004-637X/814/2/139
    ISSN
    0004-637X
    School
    Department of Physics and Astronomy
    Remarks

    Copyright © 2015 The American Astronomical Society. Reproduced by permission of the AAS

    URI
    http://hdl.handle.net/20.500.11937/36516
    Collection
    • Curtin Research Publications
    Abstract

    © 2015. The American Astronomical Society. All rights reserved. Accreting black holes are responsible for producing the fastest, most powerful outflows of matter in the universe. The formation process of powerful jets close to black holes is poorly understood, and the conditions leading to jet formation are currently hotly debated. In this paper, we report an unambiguous empirical correlation between the properties of the plasma close to the black hole and the particle acceleration properties within jets launched from the central regions of accreting stellar-mass and supermassive black holes. In these sources the emission of the plasma near the black hole is characterized by a power law at X-ray energies during times when the jets are produced. We find that the photon index of this power law, which gives information on the underlying particle distribution, correlates with the characteristic break frequency in the jet spectrum, which is dependent on magnetohydrodynamical processes in the outflow. The observed range in break frequencies varies by five orders of magnitude in sources that span nine orders of magnitude in black hole mass, revealing a similarity of jet properties over a large range of black hole masses powering these jets. This correlation demonstrates that the internal properties of the jet rely most critically on the conditions of the plasma close to the black hole, rather than other parameters such as the black hole mass or spin, and will provide a benchmark that should be reproduced by the jet formation models.

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