The Velocity-Size Relation for Members of Asteroid Families

• Main Authors: Huang, Ya-Huei, 黃雅惠
• Other Authors: Jiang, Ing-Guey
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/26451639061296213815

碩士 === 國立清華大學 === 物理學系 === 98 === Asteroid families are thought to be formed through collisional events that a catastrophic impact kicks on the parent body and produces many fragments ejected away. The ejection-velocities of these fragments might be related with their sizes. Through the observed and theoretically produced velocities of asteroids, we study the original ejection-velocities of fragments, and investigate the implied vleocity-size relation of asteroid families. Three models were proposed, Takagi model, Nakamura one-impact model and Nakamura two-impact model separately. In Vesta family, we found that maybe it didn't exist the velocity-size relation or most members were produced from low impact-velocity events of the collisional era.