An enigmatic long-lasting γ-ray burst not accompanied by a bright supernova
An enigmatic long-lasting γ-ray burst not accompanied by a bright supernova
复制标题
DOI：
10.1038/nature05374
复制
发表时间：
2006-12-21
期刊：
影响因子：
64.8
通讯作者：
Stella, L.
中科院分区：
文献类型：
--
作者：
Della Valle, M.;Chincarini, G.;Stella, L.
伽马射线暴(GRB)是来自遥远宇宙的软伽马射线的短暂、强烈的闪光。长持续时间的伽玛暴(持续时间超过S 2)被认为起源于大质量恒星1的死亡，主要是基于伽玛暴和超新星(2-7)之间的一些坚实的联系。伽玛暴060614是已发现的最接近的伽玛暴之一，它由一个5-S的硬尖峰组成，然后是更柔和、更明亮的发射，其持续时间类似于S。在这里，我们报告了对伽马射线暴060614的深度光学观测，发现没有绝对视觉等亮于M-V=-13.7时出现的超新星。因此，在光学波长上，任何与伽马暴060614有关的超新星都比与伽玛暴有关的其他超新星至少弱100倍(10)。这表明，一些持续时间较长的伽玛暴可能与非常微弱的超新星有关，也可能是由不同的现象产生的。
Gamma-ray bursts (GRBs) are short, intense flashes of soft gamma-rays coming from the distant Universe. Long-duration GRBs ( those lasting more than similar to 2 s) are believed to originate from the deaths of massive stars 1, mainly on the basis of a handful of solid associations between GRBs and supernovae(2-7). GRB 060614, one of the closest GRBs discovered, consisted of a 5-s hard spike followed by softer, brighter emission that lasted for similar to 100 s (refs 8, 9). Here we report deep optical observations of GRB 060614 showing no emerging supernova with absolute visual magnitude brighter than M-V = -13.7. Any supernova associated with GRB 060614 was therefore at least 100 times fainter, at optical wavelengths, than the other supernovae associated with GRBs(10). This demonstrates that some long-lasting GRBs can either be associated with a very faint supernova or produced by different phenomena.