Chemical enrichment of the complex hot ISM of the Antennae galaxies. I. Spatial and spectral analysis of the diffuse X-ray emission

被引:19
作者
Baldi, A
Raymond, JC
Fabbiano, G
Zezas, A
Rots, AH
Schweizer, F
King, AR
Ponman, TJ
机构
[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[2] Carnegie Observ, Pasadena, CA 91101 USA
[3] Univ Leicester, Theoret Astrophys Grp, Leicester LE1 7RH, Leics, England
[4] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England
关键词
galaxies : individual (NGC 4038/39); galaxies : interactions; galaxies : peculiar; X-rays : galaxies; X-rays : ISM;
D O I
10.1086/497914
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present an analysis of the properties of the hot interstellar medium (ISM) in the merging pair of galaxies known as the Antennae (NGC 4038/4039), performed using the deep, co-added similar to 411 ks Chandra ACIS-S data set. These deep X-ray observations and Chandra's high angular resolution allow us to investigate the properties of the hot ISM with unprecedented spatial and spectral resolution. Through a spatially resolved spectral analysis, we find a variety of temperatures (from 0.2 to 0.7 keV) and NH (from Galactic to 2x10(21) cm(-2)). Metal abundances for Ne, Mg, Si, and Fe vary dramatically throughout the ISM from subsolar values (similar to 0.2) up to several times solar.
引用
收藏
页码:113 / 133
页数:21
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