Observation of Wisp-like Structures in X-Rays near VELA pulsar

Details Observation of Wisp-like Structures in X-Rays near VELA pulsar Observation of Wisp-like Structures in X-Rays near VELA pulsar

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.8301m&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #83.01; Bulletin of the American Astronomical Society, Vol. 25, p.1420

Astronomy and Astrophysics

Astronomy

Scientific paper

Measurements of Vela pulsar spindown show that Vela is losing rotational energy at a rate of IOmega dot Omega ~ 7 times 10(36) ergs sec(-1) , but only a small fraction (<10(-3) ) of that energy is observed radiating from the pulsar and its compact nebula. The remaining power is probably carried away by a relativistic wind of positrons and electrons, which should interact with the remnant and leave some characteristic emission. We report a ROSAT X-ray observation of previously undetected structures near the Vela pulsar which are evidence for this interaction. Observations reveal: (a) an elliptical wisp, stretching from north to south centered ~ 3.5 pc from the pulsar; (b) a harder x-ray ``trail'' which starts at Vela's apparent birthplace; and (c) a longer hard feature projecting 6.5 pc southward. The wisp can be modeled as a thermal plasma, while the harder features are consistent with power-law emission.

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