Chandra Detection of a Pulsar Wind Nebula Associated with Supernova Remnant 3C 396

  • Olbert C
  • Keohane J
  • Arnaud K
  • et al.
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Abstract

We present a 100 ks observation of the Galactic supernova remnant 3C 396 (G39.2-0.3) with the Chandra X-Ray Observatory that we compare with a 20 cm map of the remnant from the Very Large Array. In the Chandra images, a nonthermal nebula containing an embedded pointlike source is apparent near the center of the remnant that we interpret as a synchrotron pulsar wind nebula surrounding a yet undetected pulsar. From the 2-10 keV spectrum for the nebula [NH= (5.3 ± 0.9) × 1022cm-2, Γ = 1.5 ± 0.3] we derive an unabsorbed X-ray flux of Sx= 1.62 × 10-12ergs cm-2s-1, and from this we estimate the spin-down power of the neutron star to be Ė = 7.2 × 1036ergs s-1. The central nebula is morphologically complex, showing bent, extended structure. The radio and X-ray shells of the remnant correlate poorly on large scales, particularly on the eastern half of the remnant, which appears very faint in X-ray images. At both radio and X-ray wavelengths, the western half of the remnant is substantially brighter than the eastern half.

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Olbert, C. M., Keohane, J. W., Arnaud, K. A., Dyer, K. K., Reynolds, S. P., & Safi-Harb, S. (2003). Chandra Detection of a Pulsar Wind Nebula Associated with Supernova Remnant 3C 396. The Astrophysical Journal, 592(1), L45–L48. https://doi.org/10.1086/377348

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