The effect of jet–ejecta interaction on the viewing angle dependence of kilonova light curves
The effect of jet–ejecta interaction on the viewing angle dependence of kilonova light curves
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喷射与喷射相互作用对千新星光变曲线视角依赖性的影响
DOI：
10.1093/mnras/stab042
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发表时间：
2021
影响因子：
4.8
通讯作者：
Quataert, Eliot
中科院分区：
文献类型：
--
作者：
Klion, Hannah;Duffell, Paul C;Kasen, Daniel;Quataert, Eliot
两颗中子星的合并会产生放射性重核的外流。在合并后的一秒钟内，中心残骸预计也会发射出一股相对论性喷流，这股喷流会冲击加热并破坏一部分放射性喷出物。在几个小时内，放射性物质的辐射会产生紫外线、光学和红外线瞬变（千诺瓦）。我们使用的一套2D相对论流体动力学模拟射流喷出物相互作用的初始条件为多维Monte Carlo辐射输运模拟所产生的视角依赖的光变曲线和光谱合并后开始。我们发现，在这个时间尺度上，射流冲击加热不影响我们调查的射流参数的kilonova排放。然而，射流对喷出物密度结构的破坏确实改变了光变曲线。喷流在球状的喷出物中切割出一条通道，露出了炽热的内部区域。从喷流轴附近（约30 °）看，千诺瓦星的亮度比喷流轴亮几倍，而且更蓝。这种影响的强度取决于射流参数，因为更严重的干扰喷出物的光变曲线更强烈的影响。光变曲线和光谱在紫外线中的变化也比在光学中的变化更大。
The merger of two neutron stars produces an outflow of radioactive heavy nuclei. Within a second of merger, the central remnant is expected to also launch a relativistic jet, which shock-heats and disrupts a portion of the radioactive ejecta. Within a few hours, emission from the radioactive material gives rise to an ultraviolet, optical, and infrared transient (a kilonova). We use the endstates of a suite of 2D relativistic hydrodynamic simulations of jet–ejecta interaction as initial conditions for multidimensional Monte Carlo radiation transport simulations of the resulting viewing angle-dependent light curves and spectra starting atafter merger. We find that on this time-scale, jet shock heating does not affect the kilonova emission for the jet parameters we survey. However, the jet disruption to the density structure of the ejecta does change the light curves. The jet carves a channel into the otherwise spheroidal ejecta, revealing the hot, inner regions. As seen from near (≲30°) the jet axis, the kilonova is brighter by a factor of a few and bluer. The strength of this effect depends on the jet parameters, since the light curves of more heavily disrupted ejecta are more strongly affected. The light curves and spectra are also more heavily modified in the ultraviolet than in the optical.
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影响因子：
64.8
作者：
Kasen, Daniel;Metzger, Brian;Ramirez-Ruiz, Enrico
通讯作者：
Ramirez-Ruiz, Enrico
DOI：
10.3847/1538-4357/aae084
发表时间：
2018-06
期刊：
The Astrophysical Journal
影响因子：
--
作者：
P. Duffell;E. Quataert;D. Kasen;Hannah Klion
通讯作者：
P. Duffell;E. Quataert;D. Kasen;Hannah Klion
DOI：
10.1086/155148
发表时间：
1977
期刊：
The Astrophysical Journal
影响因子：
--
作者：
J. Lattimer;F. Mackie;D. Ravenhall;D. Schramm
通讯作者：
D. Schramm
DOI：
10.3847/2041-8213/aa9c84
发表时间：
2017-10
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
V. Villar;J. Guillochon;E. Berger;B. Metzger;P. Cowperthwaite;M. Nicholl;K. Alexander;P. Blanchard-P.-Blanchar
通讯作者：
V. Villar;J. Guillochon;E. Berger;B. Metzger;P. Cowperthwaite;M. Nicholl;K. Alexander;P. Blanchard-P.-Blanchar
影响因子：
4.8
作者：
Gottlieb, Ore;Nakar, Ehud;Piran, Tsvi
通讯作者：
Piran, Tsvi