AN EXTENDED X-RAY OBJECT EJECTED FROM THE PSR B1259-63/LS2883 BINARY

George Pavlov, Jeremy Hare, Oleg Kargaltsev, Blagoy Rangelov, Martin Durant

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We present the analysis of Chandra X-ray Observatory observations of the eccentric γ-ray binary PSR B1259-63/LS 2883. The analysis shows that the extended X-ray feature seen in previous observations is still moving away from the binary with an average projected velocity of ≈0.07c and shows a hint of acceleration. The spectrum of the feature appears to be hard (photon index Γ ≈ 0.8) with no sign of softening compared to previously measured values. We interpret it as a clump of plasma ejected from the binary through the interaction of the pulsar with the decretion disk of the O-star around periastron passage. We suggest that the clump is moving in the unshocked relativistic pulsar wind (PW), which can accelerate the clump. Its X-ray emission can be interpreted as synchrotron radiation of the PW shocked by the collision with the clump.

Original languageEnglish (US)
Article number192
JournalAstrophysical Journal
Volume806
Issue number2
DOIs
StatePublished - Jun 20 2015

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clumps
pulsars
x rays
softening
O stars
eccentrics
observatory
collision
plasma
rays
observatories
synchrotron radiation
collisions
photons
analysis
interactions

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Pavlov, George ; Hare, Jeremy ; Kargaltsev, Oleg ; Rangelov, Blagoy ; Durant, Martin. / AN EXTENDED X-RAY OBJECT EJECTED FROM THE PSR B1259-63/LS2883 BINARY. In: Astrophysical Journal. 2015 ; Vol. 806, No. 2.
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abstract = "We present the analysis of Chandra X-ray Observatory observations of the eccentric γ-ray binary PSR B1259-63/LS 2883. The analysis shows that the extended X-ray feature seen in previous observations is still moving away from the binary with an average projected velocity of ≈0.07c and shows a hint of acceleration. The spectrum of the feature appears to be hard (photon index Γ ≈ 0.8) with no sign of softening compared to previously measured values. We interpret it as a clump of plasma ejected from the binary through the interaction of the pulsar with the decretion disk of the O-star around periastron passage. We suggest that the clump is moving in the unshocked relativistic pulsar wind (PW), which can accelerate the clump. Its X-ray emission can be interpreted as synchrotron radiation of the PW shocked by the collision with the clump.",
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AN EXTENDED X-RAY OBJECT EJECTED FROM THE PSR B1259-63/LS2883 BINARY. / Pavlov, George; Hare, Jeremy; Kargaltsev, Oleg; Rangelov, Blagoy; Durant, Martin.

In: Astrophysical Journal, Vol. 806, No. 2, 192, 20.06.2015.

Research output: Contribution to journalArticle

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AU - Durant, Martin

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AB - We present the analysis of Chandra X-ray Observatory observations of the eccentric γ-ray binary PSR B1259-63/LS 2883. The analysis shows that the extended X-ray feature seen in previous observations is still moving away from the binary with an average projected velocity of ≈0.07c and shows a hint of acceleration. The spectrum of the feature appears to be hard (photon index Γ ≈ 0.8) with no sign of softening compared to previously measured values. We interpret it as a clump of plasma ejected from the binary through the interaction of the pulsar with the decretion disk of the O-star around periastron passage. We suggest that the clump is moving in the unshocked relativistic pulsar wind (PW), which can accelerate the clump. Its X-ray emission can be interpreted as synchrotron radiation of the PW shocked by the collision with the clump.

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