Galactic <26>Al: probe of supernovae and pulsars
<26>Al 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 <26>Al could probe the nucleosynthesis activity and supernova explosions in the whole Galaxy in last few million years. INTEGRAL/SPI has a high spectral resolution to study the 1809 keV gamma-ray line from <26>Al. We have detected <26>Al from the Galactic plane and nearby star-formation regions. From <26>Al measurements, we obtain the current Galactic core- collapse supernova rate of 1.9 events per century. Correlation between the distribution of <26>Al candidate sources and the distributions of detected SNRs and pulsars in the Galaxy is discussed.
ISM abundances-nucleosynthesis-Gamma-rays observations
W. Wang
Max-Planck-Institut fur extraterrestrische Physik, Postfach 1603, 85740 Garching, Germany National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 China
国际会议
紧凑型物体的天体物理学国际会议(International Conference on Astrophysics of Compact Objects)
安徽黄山
英文
185-187
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）