超新星诞生时的一波光
M C Bersten1,2,3, G Folatelli1,2,3, F García2,4,5
1Instituto de Astrofísica de La Plata (IALP), CONICET, Argentina.
Nature
|February 23, 2018
概括
科学家们偶然发现了一颗IIb型超新星 (SN 2016gkg),显示出快速的光学亮度. 这使得人们能够详细研究这颗爆炸的恒星
科学领域:
- 天文学与天体物理学
- 恒星进化
- 超新星物理学
背景情况:
- 超新星爆炸的巨大恒星很难研究.
- 早期的电磁辐射提供了关于恒星演变和结构的关键数据.
- 超新星的不可预测性往往阻止了这一关键早期阶段的观测.
研究的目的:
- 在超新星爆炸过程中研究大质量恒星的特性.
- 分析电磁辐射在冲击后出现的最初几分钟到几个小时.
- 了解超新星的最外层结构和冲击突发物理.
主要方法:
- 偶然发现和频繁的光学观测IIb型超新星 (SN 2016gkg).
- 开发水力动力学模型来模拟超新星爆炸阶段.
- 快速变白的分析 (大约) 每天40度) 探测原始物质的特性.
主要成果:
- 超新星祖先最外层的详细描述.
- 关于冲击波出现的物理知识.
- 在不同物理阶段成功建模了超新星的演变.
结论:
- 超新星的快速亮化提供了一个独特的窗口.
- 水力动力学模型成功地复制了观测到的超新星进化.
- 冲击传播可以独立于爆炸触发机制进行研究.
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