The discovery of a spatially resolved supernova remnant in M31 with Chandra

被引：22

作者：

Kong, AKH ^{[1
]}

Garcia, MR ^{[1
]}

Primini, FA ^{[1
]}

Murray, SS ^{[1
]}

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

来源：

ASTROPHYSICAL JOURNAL | 2002年 / 580卷 / 02期

基金：

美国国家航空航天局;

关键词：

galaxies : individual (M31); supernova remnants; X-rays : ISM;

D O I：

10.1086/345610

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Chandra observations of M31 allow the first spatially resolved X-ray image of a supernova remnant (SNR) in an external spiral galaxy. CXOM31 J004327.7 + 411829 is a slightly elongated ring-shaped object with a diameter of similar to11" (42 pc). In addition, the X-ray image hints that the chemical composition of the SNR is spatial dependent. The X-ray spectrum of the SNR can be well fitted with a Raymond-Smith model or a nonequilibrium ionization model. Depending on the spectral model, the 0.3-7 keV luminosity is between and 3.2 x 10(36) and 4.5 x 10(37) ergs s(-1). The age of the SNR is estimated to be 3210-22,300 yr, and the number density of ambient gas is similar to0.003-0.3 cm(-3). This suggests that the local interstellar medium around the SNR is low.

引用

页码：L125 / L128

页数：4

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