کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1779311 1021990 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Very late thermal pulses influenced by accretion in planetary nebulae
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
Very late thermal pulses influenced by accretion in planetary nebulae
چکیده انگلیسی
We consider the possibility that a mass of ∼10-5-10-3M⊙ flows back from the dense shell of planetary nebulae and is accreted by the central star during the planetary nebula phase. This backflowing mass is expected to have a significant specific angular momentum even in (rare) spherical planetary nebulae, such that a transient accretion disk might be formed. This mass might influence the occurrence and properties of a very late thermal pulse (VLTP), and might even trigger it. For example, the rapidly rotating outer layer, and the disk if still exist, might lead to axisymmetrical mass ejection by the VLTP. Unstable burning of accreted hydrogen might result in a mild flash of the hydrogen shell, also accompanied by axisymmetrical ejection.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy - Volume 14, Issue 8, November 2009, Pages 654-658
نویسندگان
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