Photospheric Emission from Collapsar Jets in 3D Relativistic Hydrodynamics
Photospheric Emission from Collapsar Jets in 3D Relativistic Hydrodynamics
复制标题
3D 相对论流体动力学中塌缩星喷流的光球发射
DOI：
10.1088/2041-8205/814/2/l29
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Maxim V.
中科院分区：
文献类型：
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作者：
Ito;Hirotaka; Matsumoto;Jin; Nagataki;Shigehiro; Warren;Donald C.; Barkov;Maxim V.
本文基于相对论流体动力学模拟和三维后处理辐射传输计算，探讨了从大质量恒星包层爆发的相对论喷流的光球辐射。为了研究三维（3D）动力学对发射的影响，两种模型的注入条件被认为是在祖星星的中心喷流：一个周期性的岁差和另一个没有岁差。我们表明，由于与恒星信封的相互作用，以及由于岁差，喷流内开发的结构，产生的排放有显着的印记。特别是，我们发现，中央引擎的岁差活动的签名是不模糊的，可以直接观察到的光变曲线作为一个周期性的信号。我们还表明，非热的功能，这可以解释观测到的伽玛射线暴，产生的光谱，即使只有热光子最初注入和非热粒子的影响不被考虑。
We explore the photospheric emission from a relativistic jet breaking out from a massive stellar envelope based on relativistic hydrodynamical simulations and post-process radiation transfer calculations in three dimensions. To investigate the impact of three-dimensional (3D) dynamics on the emission, two models of injection conditions are considered for the jet at the center of the progenitor star: one with periodic precession and another without precession. We show that structures developed within the jet due to the interaction with the stellar envelope, as well as due to the precession, have a significant imprint on the resulting emission. Particularly, we find that the signature of precession activity by the central engine is not smeared out and can be directly observed in the light curve as a periodic signal. We also show that non-thermal features, which can account for observations of gamma-ray bursts, are produced in the resulting spectra even though only thermal photons are injected initially and the effect of non-thermal particles is not considered.