一个神秘的长时间的马射线爆发没有伴随着一个明亮的超新星
M Della Valle1, G Chincarini, N Panagia
1INAF, Osservatorio Astrofisico di Arcetri, largo E. Fermi 5, I-50125 Firenze, Italy. massimo@arcetri.astro.it
Nature
|December 22, 2006
概括
长时间的马射线爆发 (GRBs) 不一定总是信号一个明亮的超新星. 这项研究发现GRB 060614缺乏明亮的超新星,这表明一些GRBs的另类起源.
科学领域:
- 天体物理学 天体物理学
- 宇宙爆炸,宇宙爆炸.
- 高能天文学 高能天文学
背景情况:
- 长时间的马射线爆发 (GRBs) 通常与巨大的恒星死亡和超新星有关.
- 以前的GRB和超新星之间的联系是有限的.
- GRB 060614是最近发现的GRB之一,呈现出明显的时间轮.
研究的目的:
- 为了研究长时间的马射线爆发GRB 060614和潜在的超新星之间的联系.
- 为了确定任何伴随GRB 060614.4的超新星的光学亮度.
- 如果没有检测到超新星,探索长时间GRB的替代起源.
主要方法:
- 进行了对GRB 060614的深度光学观测.
- 对任何相关超新星的绝对视觉大小设置严格的限制.
- 将观察到的光学辐射与已知的GRB相关超新星进行了比较.
主要成果:
- 对于GRB 060614没有检测到任何新兴的超新星,直到 -13.7.7 的绝对视觉大小.
- 任何相关的超新星在光学上至少比之前观察到的GRB超新星微弱100倍.
- 来自GRB 060614的光学辐射明显比典型超新星协会的预期暗得多.
结论:
- 这些发现挑战了长时间的GRB和明亮的超新星之间的普遍联系.
- GRB 060614表明,一些长GRB可能起源于非常微弱的超新星.
- 另外,GRB 060614可能是由不同于核心崩超新星的现象产生的.
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