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    Relativistic magnetic reconnection in laser laboratory for testing an emission mechanism of hard-state black hole system

    K. F. F. Law1,2, Y. Abe1, A. Morace1, Y. Arikawa1, S. Sakata1,3, S. Lee1, K. Matsuo1,4, H. Morita1, Y. Ochiai1 et al.

    C. Liu1, A. Yogo1,5, K. Okamoto1, D. Golovin1, M. Ehret6,7, T. Ozaki8, M. Nakai1, Y. Sentoku1, J. J. Santos6, E. d'Humières6, Ph. Korneev9,10, and S. Fujioka1,*

    • 1Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
    • 2Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
    • 3Administration and Technology Center for Science and Engineering, Technology Management Division, Waseda University, 3-4-1 Okubo, Shinjyuku-ku, Tokyo 169-8555, Japan
    • 4Center for Energy Research, University of California, San Diego, La Jolla, California 92093-0417, USA
    • 5PRESTO, Japan Science and Technology Agency, 4-1-8 Honmachi, Kawaguchi, Saitama 332-0012, Japan
    • 6Université de Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, Talence, France
    • 7Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
    • 8National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-Cho, Toki, Gifu 509-5292, Japan
    • 9National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 31 Kashirskoe shosse, Moscow, 115409, Russian Federation
    • 10P. N. Lebedev Physics Institute, Russian Academy of Sciences, 53 Leninskiy Prospekt, Moscow, 119991, Russian Federation

    • *sfujioka@ile.osaka-u.ac.jp
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    Phys. Rev. E 102, 033202 – Published 3 September, 2020

    DOI: https://doi.org/10.1103/PhysRevE.102.033202

    Abstract

    Magnetic reconnection in a relativistic electron magnetization regime was observed in a laboratory plasma produced by a high-intensity, large energy, picoseconds laser pulse. Magnetic reconnection conditions realized with a laser-driven several kilotesla magnetic field is comparable to that in the accretion disk corona of black hole systems, i.e., Cygnus X-1. We observed particle energy distributions of reconnection outflow jets, which possess a power-law component in a high-energy range. The hardness of the observed spectra could explain the hard-state x-ray emission from accreting black hole systems.

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    Phys. Rev. E 102, 033202– Published 3 September, 2020
    • Received 29 August 2019
    • Revised 6 July 2020
    • Accepted 28 July 2020
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