MRI: Development of High Order Solar Adaptive Optics

本项目将建立一个最先进的自适应光学系统，对太阳光球层和色球层中的高空间频率结构进行优化成像。利用我们目前对等离子体物理的理解，对太阳光球层进行了理论磁流体动力学模拟，预测太阳大气层磁化等离子体中的压力标度高度和光子平均自由程具有100 Km的物理标度距离。 此外，使用散斑干涉术的太阳针状体，揭示了磁场在光球和色球之间的能量传输的作用的信息表明存在紧密缠绕的等离子体场，与目前的望远镜无法解决的意见。 对太阳的高分辨率研究将帮助我们确定1）恒星大气的动力学是如何由磁场与恒星等离子体的相互作用驱动的。2)发电机过程如何产生和放大磁场。3)磁场是如何被破坏的。4)什么物理机制负责加热日冕，太阳常数的变化，触发耀斑和日冕物质抛射。 太阳是离地球最近的星星，也是唯一可以详细研究的星星。***

RimmeleAST0079482AbstractThis project will build a state of the art adaptive optics system optimized to image the high spatial frequency structure in the solar photosphere and chromosphere. Theoretical magneto-hydrodynamics modeling of the solar photosphere using our current understanding of plasma physics, predicts that the pressure scale heights and the photon mean free path in the magnetized plasma of the solar atmosphere has a physical scale distance of 100Km. Also observations using speckle interferometry of the solar spicules which reveal information about the role of magnetic field in energy transport between the photosphere and the chromosphere indicate the presence of tightly wound plasma fields, unresolved with current telescopes. High-resolution studies of the sun will help us determine 1) how the dynamics of stellar atmospheres are driven by the interaction of the magnetic fields with the stellar plasma. 2) How magnetic fields are generated and amplified by dynamo processes. 3) How the magnetic fields are destroyed. 4) What physical mechanisms are responsible for heating the corona, variations in the solar constant, triggering flares and coronal mass ejections. The sun is the nearest star to the earth and the only star that can be studied in detail. ***