High-speed ejecta from the gamma-ray binary PSR B1259–63/LS 2883

  • George G. PavlovEmail author
  • Jeremy Hare
  • Oleg Kargaltsev
A decade of AGILE
Part of the following topical collections:
  1. A Decade of AGILE: Results, Challenges and Prospects of Gamma-Ray Astrophysics
  2. A Decade of AGILE: Results, Challenges and Prospects of Gamma-Ray Astrophysics
  3. A Decade of AGILE: Results, Challenges and Prospects of Gamma-Ray Astrophysics


Observing the famous high-mass, eccentric X-ray and \(\gamma\)-ray binary PSR B1259–63/LS 2883 with Chandra, we detected X-ray emitting clumps moving from the binary with speeds of \(\sim 0.1\,c\), possibly with acceleration. The clumps are being ejected at least once per binary period, 3.4 years, presumably around binary periastrons. The power-law spectra of the clumps can be interpreted as synchrotron emission of relativistic electrons. Here we report the results of 8 observations of the clumps in 2011–2017 (two binary cycles) and discuss possible interpretations of this unique phenomenon.


Pulsars: individual (B1259–63) X-rays: binaries 



Support for this work was provided by NASA through Chandra Awards GO5-16065, GO7-18056 and DD7-18088 issued by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of the National Aeronautics Space Administration under contract NAS8-03060.


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Copyright information

© Accademia Nazionale dei Lincei 2019

Authors and Affiliations

  • George G. Pavlov
    • 1
    Email author
  • Jeremy Hare
    • 2
  • Oleg Kargaltsev
    • 2
  1. 1.Department of Astronomy and AstrophysicsPennsylvania State UniversityUniversity ParkUSA
  2. 2.Department of PhysicsGeorge Washington UniversityWashington, DCUSA

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