Production of Nickel-56 in black hole-neutron star merger accretion disk outflows

Production of Nickel-56 in black hole-neutron star merger accretion disk outflows
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黑洞-中子星合并吸积盘流出中产生镍 56

DOI:
10.1088/0954-3899/41/4/044006
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发表时间:
2013
期刊:
arXiv: Solar and Stellar Astrophysics
影响因子:
--
通讯作者:
H. Janka
H. Janka
中科院分区:
--
文献类型:
--
作者:
R. Surman;O. L. Caballero;G. McLaughlin;O. Just;H. Janka

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紧凑天体合并事件的可能结果是中心黑洞被快速增加的碎片环包围。这个碎片盘是元素合成的丰富来源,其结果需要预测单个事件的电磁对应,并了解合并对星系化学演化的贡献。在这里,我们研究了一个二维,时间依赖的黑洞-中子星合并吸积盘模型背景下的磁盘流出核合成。我们使用该模型的两个时间快照来检验来自圆盘的中微子通量的演化对元素合成的影响。虽然早期磁盘快照中的中微子通量似乎有利于富含中子的流出,但到后期快照时,情况正好相反。因此,我们发现在流出物中有大量的镍-56。
The likely outcome of a compact object merger event is a central black hole surrounded by a rapidly accreting torus of debris. This disk of debris is a rich source of element synthesis, the outcome of which is needed to predict electromagnetic counterparts of individual events and to understand the contribution of mergers to galactic chemical evolution. Here we study disk outflow nucleosynthesis in the context of a two-dimensional, time-dependent black hole-neutron star merger accretion disk model. We use two time snapshots from this model to examine the impact of the evolution of the neutrino fluxes from the disk on the element synthesis. While the neutrino fluxes from the early-time disk snapshot appear to favor neutron-rich outflows, by the late-time snapshot the situation is reversed. As a result we find copious production of Nickel-56 in the outflows.
DOI: 10.1093/mnras/stt2503
发表时间: 2014-03-01
影响因子: 4.8
作者:
Grossman, Doron;Korobkin, Oleg;Piran, Tsvi
通讯作者: Piran, Tsvi
DOI: 10.1111/j.1365-2966.2012.21859.x
发表时间: 2012-11-01
影响因子: 4.8
作者:
Korobkin, O.;Rosswog, S.;Winteler, C.
通讯作者: Winteler, C.