一个类型Ia的超新星在超发光的短暂SN 2006gy的心脏
Anders Jerkstrand1,2, Keiichi Maeda3,4, Koji S Kawabata5
1Max Planck Institute for Astrophysics, Karl-Schwarzschild-Straße 1, 85748 Garching, Germany. anders.jerkstrand@astro.su.se.
Science (New York, N.Y.)
|January 25, 2020
概括
超亮的超新星,如SN 2006gy,可能是标准的Ia型超新星与周围恒星物质相互作用的结果. 这种相互作用可以解释在这些宇宙爆炸中观察到的极端能量输出和丰富的铁光谱.
科学领域:
- 天体物理学
- 太空爆炸
- 恒星的演变
背景情况:
- 超发光超新星 (SLSNe) 的能量输出高达正常超新星的100倍.
- 对于SLSNe的原始物和能量来源的了解仍然很少.
- SN 2006gy是一个具有不寻常光谱特征的SLSN的显著例子.
研究的目的:
- 调查超级光超新星辐射的极端能量来源.
- 为了确定这些能量短暂的恒星祖先.
- 解释SN 2006gy所观察到的光谱特征,特别是它的铁线.
主要方法:
- 对SN 2006gy进行光谱分析以确定元素组成.
- 一个与环恒星物质相互作用的Ia型超新星模型.
- 模型光曲线和光谱与SN 2006gy的观测数据的比较.
主要成果:
- 在SN 2006gy的光谱中识别出中性铁线,表明大量的铁 (约0.3太阳质量) 在高速膨胀 (1500公里/秒).
- 一个标准的Ia型超新星撞击环恒星物质的模型成功地复制了SN 2006gy的光曲线和晚期铁占主导地位的光谱.
- 在原始二进制系统中,共同的外进化被提出为同步外射出和超新星爆炸的机制.
结论:
- 一个Ia型超新星与环恒星物质的相互作用为观测到的SN 2006gy的特性提供了可行的解释.
- 共同的外进化为这些明亮的短暂生物的祖先系统提供了潜在的途径.
- 这项研究揭示了驱动超光超新星及其原始系统的机制.
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