文章基本信息

标题：Galactic 26Al, 60Fe and 60Fe/26Al gamma-ray flux ratio from massive stars
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作者：M. Suades
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2007
卷号：2007
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The radioactive nucleus 60Fe has been recently detected in the Galaxy for the first time, with the RHESSI (Reuven Ramaty High Energy Solar Spectroscopic Imager) satellite and with the SPI spectrometer onboard INTEGRAL (International Gamma-Ray Astrophysics Laboratory). In addition, galactic emission from 26Al has been confirmed and observed with excellent energetic resolution with these two missions. In the light of these advances, an analysis of these two radioactive isotopes and the g-ray line flux ratio between them is presented, under the assumption that massive stars are the sole contributors. We discuss the range of uncertainty of the yields derived from theoretical stellar models and focus on the influence of metallicity on them. Comparison between theoretical and observed 60Fe/26Al flux ratios is a potential tool to claim a global need of extra sources of 26Al, as well as to discard or support some prescriptions for the mass loss rate affecting the ejection of the synthesized 26Al and 60Fe into the interstellar medium. However, the broad range of theoretical 60Fe/26Al ratios obtained prevents to extract accurate constraints on theoretical models of massive stars.