Chernyakova, M;Neronov, A;van Soelen, B;Callanan, P;O'Shaughnessy, L;Babyk, I;Tsygankov, S;Vovk, I;Krivonos, R;Tomsick, JA;Malyshev, D;Li, J;Wood, K;Torres, D;Zhang, S;Kretschmar, P;McSwain, MV;Buckley, DAH;Koen, C

2015

December

Monthly Notices Of The Royal Astronomical Society

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

Published

34 ()

GAMMA-RAY EMISSION PULSAR WIND 2RXP J130159.6-635806 DISCOVERY TELESCOPE MISSION VARIABILITY MODEL FERMI

454

1358

1370

We report on the results of the extensive multi-wavelength campaign from optical to GeV gamma-rays of the 2014 periastron passage of PSR B1259-63, which is a unique high-mass gamma-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 Ha 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.

OXFORD

0035-8711

10.1093/mnras/stv1988