利用SKA-Mid高分辨率观测探测太阳日冕的物理特性
Probing the Physics of the Solar Corona with High-Resolution Observations using SKA-Mid
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中文总结 AI 辅助
本文研究SKA-Mid望远镜探测太阳日冕结构与演化的能力，通过模拟合成其可用波段射电辐射，发现其AA4配置可揭示太阳大气精细结构，更长基线能为日冕结构提供新观测约束，是高分辨率太阳天文台的互补设备。
中文摘要 AI 辅助
本文研究了SKA-Mid望远镜探测太阳日冕结构与演化的能力。通过太阳耀斑的辐射磁流体动力学模拟，我们合成了SKA-Mid可用波段的射电辐射。SKA-Mid观测将为等离子体过程提供重要约束，这些过程对包括耀斑/爆发、磁重联、粒子加速和回旋发射过程在内的多种天体物理环境至关重要。采用AA4配置的观测将揭示太阳大气中的精细结构，使SKA-Mid成为光学、红外和极紫外波长下运行的其他高分辨率太阳天文台的互补望远镜。对日冕散射的估算表明，在典型条件下，角展宽而非仪器分辨率（10 GHz时为0.1角秒）将限制最精细结构的探测。角展宽的程度取决于日冕湍流的性质，而SKA-Mid的更长基线将为日冕结构提供新的观测约束。
英文摘要
We examine the capability of the SKA-Mid telescope for probing solar coronal structure and evolution. Using radiative magnetohydrodynamics simulations of a solar flare, we synthesise radio emission in bands available to SKA-Mid. SKA-Mid observations would provide important constraints on plasma processes that are important to diverse astrophysical environments, including flares/eruptions, magnetic reconnection, particle acceleration, and gyro-emission processes. Observations with the AA4 configuration would reveal fine-scale structures in the solar atmosphere, making SKA-Mid a complementary telescope to other high resolution solar observatories operating at optical, infrared, and XUV wavelengths. Estimates of coronal scattering suggest that angular broadening rather than instrumental resolution (0.1'' at 10 GHz) will limit the detection of the finest structure under typical conditions. The extent of angular broadening depends on the nature of turbulence in the corona, and the longer baselines of SKA-Mid will serve to provide new observational constraints on coronal structure.
