Chandra observations of the crab-like supernova remnant G21.5-0.9

Patrick Slane, Yang Chen, Norbert S. Schulz, Frederick D. Seward, John Hughes, Bryan M. Gaensler

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Chandra observations of the Crab-like supernova remnant G21.5-0.9 reveal a compact central core and spectral variations indicative of synchrotron burn-off of higher energy electrons in the inner nebula. The central core is slightly extended, perhaps indicating the presence of an inner wind-shock nebula surrounding the pulsar. No pulsations are observed from the central region, yielding an upper limit of ∼40% for the pulsed fraction. A faint outer shell may be the first evidence of the expanding ejecta and blast wave formed in the initial explosion, indicating a composite nature for G21.5-0.9.

Original languageEnglish (US)
Pages (from-to)L29-L32
JournalAstrophysical Journal
Issue number1 PART 2
StatePublished - Apr 10 2000


All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • ISM: individual (G21.5-0.9)
  • Supernova remnants
  • X-rays: ISM

Cite this

Slane, P., Chen, Y., Schulz, N. S., Seward, F. D., Hughes, J., & Gaensler, B. M. (2000). Chandra observations of the crab-like supernova remnant G21.5-0.9. Astrophysical Journal, 533(1 PART 2), L29-L32.