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A 'kilonova' associated with the short-duration γ-ray burst GRB130603B

机译:与短时γ射线暴GRB130603B相关的“千伏”

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摘要

Short-duration γ-ray bursts are intense flashes of cosmic γ-rays, Lasting less than about two seconds, whose origin is unclear. The favoured hypothesis is that they are produced by a relativistic jet created by the merger of two compact stellar objects (specifically two neutron stars or a neutron star and a black hole). This is supported by indirect evidence such as the properties of their host galaxies, but unambiguous confirmation of the model is still lacking. Mergers of this kind are also expected to create significant quantities of neutron-rich radioactive species, whose decay should result in a faint transient, known as a 'kilonova', in the days following the burst. Indeed, it is speculated that this mechanism may be the predominant source of stable r-process elements in the Universe. Recent calculations suggest that much of the kilonova energy should appear in the near-infrared spectral range, because of the high optical opacity created by these heavy r-process elements. Here we report optical and near-infrared observations that provide strong evidence for such an event accompanying the short-duration γ-ray burst GRB 130603B. If this, the simplest interpretation of the data, is correct, then it confirms that compact-object mergers are the progenitors of short-duration γ-ray bursts and the sites of significant production of r-process elements. It also suggests that kilonovae offer an alternative, unbeamed electromagnetic signature of the most promising sources for direct detection of gravitational waves.%哈勃太空望远镜对短时间γ-射线暴SGRBHrn130603B(由美国国家航空航天局的Swift卫星rn上搭载的Burst Alert Telescope于2013年6月3rn日探测到)的位置所做的观测,为有关这种射rn线暴起源的人们所青睐的模型(两个紧凑型天rn体的合并)提供了支持。Nial Tanvir等人分别在rn射线暴发生后大约9天和30天在可见光和近红rn外波长对其位置进行了成像观察,发现了存在rn一个暗的、快速瞬变的或称为“kilonova”的天rn体的迹象。对这些数据的最简单的解读是,该rn射线暴是紧凑型天体的一次合并。作者提出,rn这样的合并可能是通过r-process的核合成大量rn生成重元素的地方。
机译:短时间的γ射线爆发是宇宙γ射线的强烈闪光,持续不到两秒钟,其起源尚不清楚。最受支持的假设是它们是由相对论性射流产生的,该相对论性射流是由两个紧凑的恒星物体(特别是两个中子星或一个中子星和一个黑洞)合并而成的。间接证据(例如其宿主星系的属性)对此提供了支持,但仍缺乏对模型的明确确认。此类合并也有望产生大量中子富集的放射性物质,这些物质的衰变将在爆发后的几天内产生微弱的瞬变,称为“基洛诺娃”。实际上,据推测,这种机制可能是宇宙中稳定r过程元素的主要来源。最近的计算表明,由于这些繁重的r加工元素产生的高光学不透明性,千光子能的大部分应出现在近红外光谱范围内。在这里,我们报告光学和近红外观测,这些观测为伴随短时间γ射线猝发GRB 130603B发生的此类事件提供了有力的证据。如果这是对数据最简单的解释是正确的,则表明紧凑的物体合并是短时γ射线爆发的先驱,是r过程元素大量产生的场所。它还表明千伏星为直接检测引力波提供了最有前途的信号源的替代性,无波束的电磁特征。%哈勃太空望远镜对短时间γ-射线暴SGRBHrn130603B的Burst Alert Telescope于2013年6月3日日探测到)的位置处理的观察,为有关这种射rn线暴起源的人们所青睐的模型(两个小型天体的合并)提供了支持。NialTanvir等人分别在rn射线暴发生后大约9天和30天在可见光和近红rn外部波长位置位置进行了成像观察,发现了存在rn一个暗的,快速瞬变的或称为“对这些数据的最简单的解释是,该rn射线暴是微观型天体的一次合并。作者提出,rn此类的合并可能是通过r-process的核合成大量rn生成重元素的地方。

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  • 来源
    《Nature》 |2013年第7464期|547-549b1|共4页
  • 作者单位

    Department of Physics and Astronomy, University of Leicester, University Road, Leicester LEI 7RH, UK;

    Department of Physics, University of Warwick, Coventry CV4 7AL, UK;

    Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218, USA;

    Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark;

    Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218, USA;

    Department of Physics and Astronomy, University of Leicester, University Road, Leicester LEI 7RH, UK;

    Department of Physics, University of Warwick, Coventry CV4 7AL, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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