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arXiv 1012.4647astro-ph.SR
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内转换电子和超新星光变曲线

Internal conversion electrons and supernova light curves

I. R. Seitenzahl

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7 pages, 4 figures, 1 tables, to appear in Prog. Part. Nucl. Phys
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摘要：

放射性衰变对超新星喷出物的再加热有很大的贡献。以前的工作主要考虑了由56 Ni、56 Co、57 Ni、57 Co、44 Ti和44 Sc产生的伽马射线和正电子沉积的能量。我们指出俄歇电子和内转换电子构成了一个附加热源。在后期，这些电子可以对超新星的光变曲线做出重要贡献，以获得合理的核合成产额。特别是，在57 Co衰变中发射的内部转换电子是超新星的重要加热通道，这些超新星对伽马射线基本上是透明的。我们表明，当这些电子加热占，SN 1998bw和SN 2003hv的光变曲线的减慢自然得到典型的核合成产量。此外，我们表明，SN 1987 A的内部转换电子的影响可能是显着的衍生44钛产量从其后期的辐射热光变曲线。

英文摘要：

Radioactive decays contribute significantly to the re-heating of supernova ejecta. Previous works mainly considered the energy deposited by gamma-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 gamma-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.

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