Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.237g&link_type=abstract
Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:
Astronomy and Astrophysics
Astrophysics
Scientific paper
Pulsar-powered supernova remnants (plerions), of which the Crab Nebula is the best-studied example, had otherwise generally been observed only in the radio and X-ray bands. We observed bright, compact plerions with ISO, and report power-law emission which we interpret as synchrotron radiation from G21.5-0.9 and the `Crab twin' 0540-69.3 in the LMC. In the former the spectrum seems consistent with an extrapolation from X-rays, but in the latter suggests an intermediate power-law regime, as seen in the Crab itself. We also present preliminary results of ISO observations of the Crab Nebula which image it in the region of the radio-to-optical break frequency. We discuss the implications of our observations for the origin and history of the synchrotron-emitting particles accelerated in these remnants.
Gallant Yves A.
Tuffs Richard. J.
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