Plerions with Holes? the Unusual Supernova Remnants DA 495 and G76.9+1.0

Details Plerions with Holes? the Unusual Supernova Remnants DA 495 and G76.9+1.0 Plerions with Holes? the Unusual Supernova Remnants DA 495 and G76.9+1.0

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1224a&link_type=abstract

Chandra Proposal ID #04500821

Mathematics

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Chandra Proposal Id #04500821

Scientific paper

We request a total of 50 ks to observe with Chandra two synchrotron nebulae that resemble the Crab in many respects but are unusual in their spectral and morphological properties---most notably, they exhibit distinct minima in radio flux at their geometrical centers. The nebulae appear to be best described as old plerionic supernova remnants. Our Chandra observations will image the extended, non-thermal radio structures and reveal their spectra, test for the presence of X-ray ``holes'' associated with the radio minima, and unearth any small-scale features (jets, tori) around their central engines. Our results will allow for unambiguous classification of these objects and will test long-held theories of plerion evolution at late times, an observationally unconstrained regime.

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