Chandra Observation of the Eastern Limb of the Cygnus Loop Supernova Remnant

Astronomy and Astrophysics – Astrophysics

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Scientific paper

We present initial results from a Chandra/ACIS observation of the XA region on the eastern limb of the Cygnus Loop supernova remnant. The Cygnus Loop is a cavity remnant in which the supernova blast wave has only relatively recently encountered the walls of the cavity; the XA region is the result of the blast wave encountering a large cloud protruding into the cavity. This region is particularly bright and soft in the X-ray band; it was imaged on the back-illuminated ACIS S3 chip in order to exploit the CCD's better low energy response. XA is one of the most advanced examples of cloud/shock interactions in the remnant, and it has a complex morphology. We use the imaging and spectral capabilities of the Chandra/ACIS together with narrow band optical images to elucidate the structure of the region and the shock properties.

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