Supernova 1987 A. A cold, dusty and rusty supernova
Supernova 1987 A. A cold, dusty and rusty supernova
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Supernova 1987 A. 寒冷、尘土飞扬、锈迹斑斑的超新星
DOI：
10.1093/mnras/255.4.671
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
J. Graham
中科院分区：
文献类型：
--
作者：
J. Spyromilio;J. Graham
本文模拟了超新星1987 A喷出物中单电离铁的禁戒线的近红外辐射。发现直到1989年2月，相对较高的激发跃迁，如在7150 A处的α 4 F-α 2 G多重峰所产生的跃迁，是令人惊讶地强。推测的温度和电子密度表明Fe +的质量约为10 - 3 M Ω。我们没有发现中性或双电离铁强发射的证据。假设SN 1987 A的喷出物中含有0.07 M的铁，我们的结果表明，大部分铁不能在我们的波长范围内发射
The near-infrared emission from forbidden lines of singly ionized iron in the ejecta of Supernova 1987A was modelled. It is found that as late as 1989 February, relatively high excitation transitions such as those arising from the a 4 F-a 2 G multiplet at 7150 A are surprisingly strong. The inferred temperature and electron density imply a mass of Fe + of order 10 -3 M ⊙ . We do not find evidence for strong emission by neutral or doubly ionized iron. Given that 0.07 M ⊙ of iron are believed to be present in the ejecta of SN 1987A, our results suggest that the bulk of the iron is unable to emit in our wavelength range