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CCD soft X-ray observations of the Puppis a supernova remnantWe present the first images and spectra of an astronomical object, other than the Sun, acquired with a charge coupled device (CCD) imaging X-ray spectrometer. During a 230 s sounding rocket observation, we have acquired moderate-resolution spectra and moderate-resolution images of a portion of the Pup A supernova remnant (SNR). Based on these data, we conclude that the X-ray spectrum of Pup A is inconsistent with any single-temperature equilibrium or nonequilibrium plasma model. We find evidence for variations in the emitting plasma on scales as small as 5.0 min and as large as 30.0 min. The spatial structure of the spectral variations in the remnant is found to be inconsistent with the standard Sedov model for the evolution of a SRN into a homogeneous interstellar medium (ISM). We suggest that the remnant is expanding into a region of the ISM having a density of approximately 1 cm(exp -3) with inhomogeneities on the order of 50%. We have found evidence for the presence of a knot of plasma enriched in neon, but require more data to be conclusive.
Document ID
19950033972
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Berthiaume, G. D.
(Pennsylvania State University University Park, PA, United States)
Burrows, D. N.
(Pennsylvania State University University Park, PA, United States)
Garmire, G. P.
(Pennsylvania State University University Park, PA, United States)
Nousek, J. A.
(Pennsylvania State University University Park, PA, United States)
Date Acquired
August 16, 2013
Publication Date
April 10, 1994
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 425
Issue: 1
ISSN: 0004-637X
Subject Category
Astronomy
Accession Number
95A65571
Funding Number(s)
CONTRACT_GRANT: NAG5-100
Distribution Limits
Public
Copyright
Other

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