Travel grant for ROSA DST/Sacramento Peak Observations: Magnetic mapping of the chromosphere - Magneto-seismology of bright points

从太阳光球到日冕的等离子体温度快速上升至1- 2mk，这仍然是太阳物理学中一个未解决的问题。很明显，亚光球运动的机械能以某种方式被输送到太阳高层大气中，在那里它可能被消散，导致周围等离子体的加热。磁场在能量传输中起着关键作用，因为：磁场(i)勾勒出磁流体动力学（MHD）波导的形状；（ii）引导MHD波；（iii）确定连接拓扑；(4)有助于等离子体加热。这种能量传输的一个可行的设想是，对流运动和太阳全球振荡可能在（亚）光球层激发MHD波，然后这些MHD波可能通过色球层传播，携带相关能量进入日冕。如果MHD波在能量传输过程中发挥作用，那么从这些波在太阳低层大气中产生的地方进行观测跟踪是非常重要的。为了揭示磁性结构中存储的可用自由能，理解磁性拓扑的性质（例如，无力或无力，螺旋度等）也是至关重要的。在此，我们提出(1)在磁亮点观测和跟踪从光球到色球的MHD波；（ii）接下来，通过亮点的磁震学，我们不仅将确定这些重要特征的性质（潜在的或不潜在的），而且还将首次构建它们的三维磁图。

The rapid rise of plasma temperature up to 1-2 MK from the solar photosphere towards the corona is still an unresolved problem in solar physics. It is clear that the mechanical energy of sub-photospheric motions is transported somehow into the upper solar atmosphere, where it may be dissipated leading to the heating of the ambient plasma. A key role in the energy transport is played by the magnetic field because: the magnetic field (i) outlines the shape of magnetohydrodynamic (MHD) waveguides; (ii) guides MHD waves; (iii) determines connectivity topology; and (iv) contributes to plasma heating. A viable scenario of this energy transport is that the convective motions and solar global oscillations may excite MHD waves in the (sub-)photosphere, which may then propagate through the chromosphere carrying relevant energy into the corona. If MHD waves play a role in the energy transport process(es), it is of great importance that these waves are tracked observationally from where they are generated in the lower solar atmosphere. It is also of fundamental importance to understand the nature of magnetic topology (e.g. force free or non-force free, helicity, etc.) in order to reveal the available free energy stored in magnetic structures. Here we propose (i) observing and tracking MHD waves from photosphere to chromosphere in magnetic bright points; (ii) Next, by means of magneto-seismology of bright points, we will determine not just the nature of these important features (potential or not) but will also construct for the first time their 3D magnetic map.