کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1854521 1035840 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Internal conversion electrons and supernova light curves
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Internal conversion electrons and supernova light curves
چکیده انگلیسی

Radioactive decays contribute significantly to the re-heating of supernova ejecta. Previous works mainly considered the energy deposited by γγ-rays and positrons produced by 56Ni, 56Co, 57Ni, 57Co, 44Ti, and 44Sc. We point out that Auger and internal conversion electrons constitute an additional heat source. At late times, these electrons can contribute significantly to supernova light curves for reasonable nucleosynthetic yields. In particular, the internal conversion electrons emitted in the decay of 57Co are an important heating channel for supernovae that have become largely transparent to γγ-rays. We show that when the heating by these electrons is accounted for, the slowing down of the light curves of SN 1998bw and SN 2003hv is naturally obtained for typical nucleosynthetic yields. Additionally, we show that for SN 1987A the effects of internal conversion electrons are likely significant for the derivation of 44Ti yields from its late time bolometric light curve.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Particle and Nuclear Physics - Volume 66, Issue 2, April 2011, Pages 329–334
نویسندگان
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