A New Development of Chondrule Formation Theory : Based on a Comparison with Cosmic Spherules

大多数陨石中都含有球粒，其形成机制至今仍不清楚。为了阐明其形成过程，我们研究了类似于球粒的硅酸盐小颗粒宇宙球粒的形成过程。首先，我们测量每个宇宙球体的形状、化学成分和质地。我们发现它们之间有明显的相关性。此外，我们发现，利用粒子在地球大气中的运动和粒子的加热/冷却理论，可以定量地理解这种相关性。基于这些认识，我们期待对球粒形成机制的新研究能够得到发展。

Formation mechanism of chondrules, which are included in most of meteorites, has not been understood clearly. To elucidate the formation process, we approach to the formation process of cosmic spherules that are silicate small particles similar to chondrules. First, we measure the shape, chemical composition, and texture of each cosmic spherule. We find a clear correlation among them. Also, we find that the correlation can be understood quantitatively using a theory of the motion of the particle in the Earth atmosphere and the heating/cooling to the particle. Based on these understandings, we expect new studies on the formation mechanism of chondrules should be developed.