GW170817、GRB170817A与AT2017gfo的第一性原理双中子星并合模型
A first-principles binary neutron star merger model of GW170817, GRB170817A, and AT2017gfo
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中文总结 AI 辅助
本研究针对GW170817等多信使观测的双中子星并合事件，采用第一性原理模拟方法，构建统一模型重现对应天体信号，建立了跨多信使观测的双中子星并合解释框架。
中文摘要 AI 辅助
双中子星并合事件GW170817的多信使观测，与其电磁对应体GRB170817A、AT2017gfo一道，是天体物理学的里程碑，但对其统一的物理解释仍未明确。我们开展了基于第一性原理的广义相对论磁流体动力学中微子辐射转移并合模拟，后续结合核合成计算与光子辐射转移，生成千新星光变曲线。结果显示，大尺度发电机同时产生各向等效光度约10^51 erg·s^-1的相对论喷流，以及约0.08倍太阳质量的富中子抛射物，重现了GRB170817A的余辉与AT2017gfo的千新星光变曲线。本研究建立了用于解释双中子星并合在引力波、伽马射线暴与千新星观测中统一的第一性原理框架。
英文摘要
The multimessenger observation of the binary neutron star merger event GW170817, associated with its electromagnetic counterparts GRB170817A and AT2017gfo, marked a milestone in astrophysics, yet its unified physical explanation remains elusive. We conduct an end-to-end simulation based on a first-principles general-relativistic magnetohydrodynamics neutrino-radiation transfer merger simulation, followed by nucleosynthesis calculations and photon radiative transfer to generate kilonova light curves. We show that the large-scale dynamo simultaneously produces a relativistic jet with an isotropic-equivalent luminosity of $\sim 10^{51}~{\rm erg~s^{-1}}$ and $\approx 0.08M_\odot$ of neutron-rich ejecta, reproducing the GRB170817A afterglow and the AT2017gfo kilonova light curves. Our results establish a unified first-principles framework for interpreting binary neutron star mergers across gravitational wave, gamma-ray burst, and kilonova observations.
