Revealing the obscured supernova remnant Kesteven 32 with Chandra

被引：16
|
作者：
Vink, J [1 ]
机构：
[1] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA
来源：
ASTROPHYSICAL JOURNAL | 2004年 / 604卷 / 02期
关键词：
supernova remnants; X-rays : individual (Kesteven 32); X-rays : ISM;
D O I：
10.1086/381930
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 similar to4 x 10(22) cm(-2), larger than previously reported. Spectral analysis indicates that the ionization age of this object is very young, with net similar to 4 x 10(9) cm(-3) s and a temperature of kT(e) similar to 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.
引用
收藏
页码：693 / 699
页数：7
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