Title: Oscillatory reconnection as a plasma diagnostic in the solar corona Show Chinese title

Title: 日冕中振荡重联作为等离子体诊断方法

Abstract: Oscillatory reconnection is a relaxation process in magnetised plasma, with an inherent periodicity that is exclusively dependent on the properties of the background plasma. This study focuses on the seismological prospects of oscillatory reconnection in the solar corona. We perform three sets of parameter studies (for characteristic coronal values of the background magnetic field, density and temperature) using the PLUTO code to solve the fully compressive, resistive MHD equations for a 2D magnetic X-point. From each parameter study, we derive the period of the oscillatory reconnection. We find that this period is inversely proportional to the characteristic strength of the background magnetic field and the square root of the initial plasma temperature, while following a square root dependency upon the equilibrium plasma density. These results reveal an inverse proportionality between the magnitude of the Alfv\'en speed and the period, as well as the background sound speed and the period. Furthermore, we note that the addition of anisotropic thermal conduction only leads to a small increase in the mean value for the period. Finally, we establish an empirical formula that gives the value for the period in relation to the background magnetic field, density and temperature. This gives us a quantified relation for oscillatory reconnection, to be used as a plasma diagnostic in the solar corona, opening up the possibility of using oscillatory reconnection for coronal seismology. Show Chinese abstract

Abstract: 振荡重联是磁化等离子体中的一个松弛过程，具有固有的周期性，该周期性仅依赖于背景等离子体的特性。 本研究关注太阳日冕中振荡重联的地震学前景。 我们使用PLUTO代码进行三组参数研究（针对背景磁场、密度和温度的日冕特征值），以求解二维磁X点的完全压缩、电阻MHD方程。 从每组参数研究中，我们推导出振荡重联的周期。 我们发现该周期与背景磁场的特征强度成反比，并与初始等离子体温度的平方根成比例，而与平衡等离子体密度的平方根成比例。 这些结果揭示了阿尔芬速度大小与周期之间以及背景声速与周期之间的反比例关系。 此外，我们注意到各向异性热传导的加入只会导致周期平均值的轻微增加。 最后，我们建立了一个经验公式，用于根据背景磁场、密度和温度来确定周期的值。 这为我们提供了振荡重联的量化关系，可用于太阳日冕中的等离子体诊断，为利用振荡重联进行日冕地震学打开了可能性。