Multi-wavelength observations of the binary system PSR B1259-63/LS 2883 around the 2014 periastron passage

M. Chernyakova, A. Neronov, B. van Soelen, P. Callanan, L. O'Shaughnessy, Iu Babyk, S. Tsygankov, Ie Vovk, R. Krivonos, J. A. Tomsick, D. Malyshev, J. Li, K. Wood, D. Torres, S. Zhang, P. Kretschmar, M. V. McSwain, D. A.H. Buckley, C. Koen

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    Abstract

    © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. We report on the results of the extensive multi-wavelength campaign from optical to GeV γ-rays of the 2014 periastron passage of PSR B1259-63, which is a unique high-mass γ-ray emitting binary system with a young pulsar companion. Observations demonstrate the stable nature of the post-periastron GeV flare and prove the coincidence of the flare with the start of rapid decay of the Hα equivalent width, usually interpreted as a disruption of the Be stellar disc. Intensive X-ray observations reveal changes in the X-ray spectral behaviour happening at the moment of the GeV flare. We demonstrate that these changes can be naturally explained as a result of synchrotron cooling of monoenergetic relativistic electrons injected into the system during the GeV flare.
    Original languageEnglish
    Pages (from-to)1358-1370
    JournalMonthly Notices of the Royal Astronomical Society
    Volume454
    Issue number2
    DOIs
    Publication statusPublished - 1 Jan 2015

    Keywords

    • Gamma rays: stars
    • Pulsars: individual: PSR B1259-63
    • Stars: emission-line, Be
    • X-rays: binaries
    • X-rays: individual: PSR B1259-63

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