کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1780122 1523796 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
26Al production from magnetically induced extramixing in AGB stars
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
26Al production from magnetically induced extramixing in AGB stars
چکیده انگلیسی

We discuss nucleosynthesis results obtained following the recent suggestion that extramixing phenomena in red giants might be driven by magnetic buoyancy. We explore for this model the production of the short-lived radioactive isotope 26Al and of stable light nuclei, considering both the case of the general buoyancy of flux tubes and that of the intermittent release of magnetized unstable structures. We show that abundant 26Al can be produced, up to, and above, the highest levels measured in presolar grains. This level would be also sufficient to explain the early solar system 26Al as coming from a nearby AGB star of low mass. The case of fast-moving instabilities is the most efficient, reaching almost the same effectiveness as hot bottom burning (HBB).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy Reviews - Volume 52, Issues 7–10, October 2008, Pages 412–415
نویسندگان
, ,