Galactic 26Al:: probe of supernovae and pulsars

被引：0
|
作者：
Wang, W. [1 ]
机构：
[1] Max Planck Inst Extraterr Phys, D-85740 Garching, Germany
来源：
ASTROPHYSICS OF COMPACT OBJECTS | 2007年 / 968卷
关键词：
ISM : abundances; nuelcosynthesis; gamma-rays : observations;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Al-26 is an unstable isotope with the mean lifetime of 1 Myr. It is mainly synthesized in massive stars, before and during their evolution to core-collapse supernovae. Since the gamma-ray line is transparent to the interstellar medium, studies of Al-26 could probe the nucleosynthesis activity and supernova explosions in the whole Galaxy in last few million ears. INTEGRAL/SPI has a high spectral resolution to study the 1809 keV gamma-my line from Al-26. We have detected Al-26 from the Galactic plane and nearby star-formation regions. From Al-26 measurements, we obtain the current Galactic core-collapse supernova rate of 1.9 events per century. Correlation between the distribution of Al-26 candidate sources and the distributions of detected SNRs and pulsars in the Galaxy is discussed.
引用
收藏
页码：185 / 187
页数：3
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