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Title: The dynamic X-ray nebula powered by the pulsar B1259-63

We present observations of the eccentric γ-ray binary B1259-63/LS 2883 with the Chandra X-ray Observatory. The images reveal a variable, extended (about 4'', or ∼1000 times the binary orbit size) structure, which appears to be moving away from the binary with the velocity of 0.05 of the speed of light. The observed emission is interpreted as synchrotron radiation from relativistic particles supplied by the pulsar. However, the fast motion through the circumbinary medium would require the emitting cloud to be loaded with a large amount of baryonic matter. Alternatively, the extended emission can be interpreted as a variable extrabinary shock in the pulsar wind outflow launched near binary apastron. The resolved variable X-ray nebula provides an opportunity to probe pulsar winds and their interaction with stellar winds in a previously inaccessible way.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. George Washington University, Washington, DC 20052 (United States)
  2. Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16801 (United States)
  3. Department of Medical Biophysics, University of Toronto, Toronto, ON, M5S 2J7 (Canada)
Publication Date:
OSTI Identifier:
22357245
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 784; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AVAILABILITY; EMISSION; IMAGES; INTERACTIONS; NEBULAE; PULSARS; RELATIVISTIC RANGE; STELLAR WINDS; VELOCITY; VISIBLE RADIATION; X RADIATION