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Discovery of X-Ray-Emitting O-Ne-Mg-Rich Ejecta in the Galactic Supernova Remnant Puppis AWe report on the discovery of X-ray-emitting O-Ne-Mg-rich ejecta in the middle-aged Galactic O-rich supernova remnant Puppis A with Chandra and XMM-Newton. We use line ratios to identify a low-ionization filament running parallel to the northeastern edge of the remnant that requires super-solar abundances, particularly for O, Ne, and Mg, which we interpret to be from O-Ne-Mg-rich ejecta. Abundance ratios of Ne/O, Mg/O, and Fe/O are measured to be [approx]2, [approx]2, and <0.3 times the solar values. Our spatially resolved spectral analysis from the northeastern rim to the western rim otherwise reveals sub-solar abundances consistent with those in the interstellar medium. The filament is coincident with several optically emitting O-rich knots with high velocities. If these are physically related, the filament would be a peculiar fragment of ejecta. On the other hand, the morphology of the filament suggests that it may trace ejecta heated by a shock reflected strongly off the dense ambient clouds near the northeastern rim.
Document ID
20100037060
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Katsuda, Satoru
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Hwang, Una
Petre, Robert
Park, Sangwook
Mori, Koji
Tsunemi, Hiroshi
Date Acquired
August 25, 2013
Publication Date
May 10, 2010
Publication Information
Publication: The Astrophysical Journal
Volume: 714
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Report/Patent Number
GSFC.JA.4826.2011
Distribution Limits
Public
Copyright
Other

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