Abundance gradients and the role of supernovae in M87

被引：58
|
作者：
Gastaldello, F [1 ]
Molendi, S [1 ]
机构：
[1] CNR, IASF, I-20133 Milan, Italy
来源：
ASTROPHYSICAL JOURNAL | 2002年 / 572卷 / 01期
关键词：
galaxies : abundances; galaxies : clusters : general; galaxies : individual (M87); X-rays : galaxies;
D O I：
10.1086/340283
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We make a detailed measurement of the metal abundance profiles and metal abundance ratios of the inner core of M87/Virgo observed by XMM-Newton during the performance veri cation phase. We use multi-temperature models for the inner regions, and we compare the plasma codes APEC and MEKAL. We confirm the strong heavy-element gradient previously found by ASCA and BeppoSAX, but also find a significant increase in light elements, in particular O. This fact, together with the constant O/Fe ratio in the inner 9', indicates an enhancement of contribution in the core of the cluster, not only by Type Ia supernovae but also by Type II supernovae.
引用
收藏
页码：160 / 168
页数：9
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