论文标题
使用有限元模型来限制（16）Psych的可能内部布局的数值方法
A numerical approach using a finite element model to constrain the possible interior layout of (16) Psyche
论文作者
论文摘要
小行星（16）的心理是最大的M型小行星，在主皮带小行星中具有高雷达反照率。该物体可能是金属和硅酸盐的混合物，因为其散装密度低于金属材料，并且观察结果推断了表面上存在硅酸盐材料。在这里，当心理结构由球形铁核和两种类型的富含硅酸盐的层（由压缩过程引起的压缩和未压缩的层）时，我们会在数值上研究内部布局。我们开发了一种逆问题算法，以确定布局分布，从而结合了有限的元素方法，以限制了限制的限制，从而限制了限制的限制。半径为72 km，由压缩区和未压缩区域组成的硅酸盐层具有高达68 km的厚度，以支撑在最近的雷达观察中检测到的局部金属浓度，我们对最小核心的构成了更多的约束，却占据了34-40％的层次。金属材料的来源最终。
Asteroid (16) Psyche is notable for the largest M-type asteroid and has the high radar albedo among the main-belt asteroids. The object is likely a mixture of metal and silicates because of its lower bulk density than metallic materials and observations inferring the existence of silicate materials on the surface. Here, we numerically investigate the interior layout when the structure of Psyche consists of a spherical iron core and two types of silicate-rich layers (compressed and uncompressed ones resulting from the compaction process. We develop an inverse problem algorithm to determine the layout distribution by combining a Finite Element Model approach that accounts for density variations and constrains pressure-based crushing conditions. The results show that given the crushing limit of 10 MPa the smallest core size likely reaches 72 km in radius, and the silicate-rich layer, consisting of both compressed and uncompressed regions, has a thickness ranging up to 68 km. To support the localized metal concentration at the crater-like region detected in the recent radar observation, we give more constraints on the minimum core size which takes up to 34 - 40 % of the entire size of Psyche. Our study also addresses that the ferrovolcanic surface eruptions could still be a source of metal-rich materials. Finally, while the differentiated structure having a spherical core condition is just part of potential scenarios, the present study infers that the core and compressed layer conditions likely control the surface condition.
