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Title:
Revealing the Obscured Supernova Remnant Kesteven 32 with Chandra
Authors:
Vink, Jacco
Affiliation:
AA(Columbia Astrophysics Laboratory, Columbia University, MC 5247, 550 West 120th Street, New York, NY 10027; )
Publication:
The Astrophysical Journal, Volume 604, Issue 2, pp. 693-699. (ApJ Homepage)
Publication Date:
04/2004
Origin:
UCP
ApJ Keywords:
ISM: Supernova Remnants, X-Rays: Individual: Name: Kesteven 32, X-Rays: ISM
DOI:
10.1086/381930
Bibliographic Code:
2004ApJ...604..693V

Abstract

I report here on the analysis and interpretation of a Chandra observation of the supernova remnant Kes 32. Kes 32 is rather weak in X-rays because of a large interstellar absorption, which is found to be ~4×1022 cm-2, larger than previously reported. Spectral analysis indicates that the ionization age of this object is very young, with net~4×109 cm-3 s and a temperature of kTe~1 keV. The X-ray emission peaks at a smaller radius than in the radio. The low ionization age suggests that Kes 32 is a young remnant. However, a young age is in contradiction to the relatively large apparent size, which indicates an age of several thousand years instead of a few hundred years. This problem is discussed in connection with Kes 32's unknown distance and its possible association with the Norma Galactic arm.
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