Possible origin of the Damocloids: the scattered disk or a new region?  

作　　者：Su Wang Hai-Bin Zhao Jiang-Hui Ji Sheng Jin Yan Xia Hao Lu Min Wang Jin-Sheng Yao 

机构地区：[1]Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Research in Astronomy and Astrophysics》2012年第11期1576-1584,共9页天文和天体物理学研究（英文版）

基　　金：Wang S. is supported by the National Natural Science Foundation of China (Grant Nos. 10925313 and 10833001);the China Post doctoral Science Foundation (Grant No. 2011M500962);Z.H.B is supported by the National Natural Science Foundation of China (Grant Nos. 10503013 and 10933004);J.J.H is grateful for support by the National Natural Science Foundation of China (Grant Nos. 11273068, 10973044 and 10833001);the Natural Science Foundation of Jiangsu Province (Grant No. BK2009341);the Foundation of Minor Planets of Purple Mountain Observatory;the innovative and inter disciplinary program by CAS (Grant No. KJZD-EW-Z001)

摘　　要：The Damocloids are a group of unusual asteroids that recently added a new member： 2010 EJ104. The dynamical evolution of the Damocloids may reveal a connection from the Main Belt to the Kuiper Belt and beyond the scattered disk. According to our simulations, two regions may be considered as possible origins of the Damocloids： the scattered disk, or a part of the Oort cloud, which will be perturbed to a transient region located between 700 AU and 1000 AU. Based on their potential origin, the Damocloids can be classified into two types, depending on their semi-major axes, and about 65.5% of the Damocloids are classified into type I which mainly originate from the Oort cloud. Whether the Damocloids are inactive nuclei of the Halley Family of Comets may depend on their origin. KThe Damocloids are a group of unusual asteroids that recently added a new member： 2010 EJ104. The dynamical evolution of the Damocloids may reveal a connection from the Main Belt to the Kuiper Belt and beyond the scattered disk. According to our simulations, two regions may be considered as possible origins of the Damocloids： the scattered disk, or a part of the Oort cloud, which will be perturbed to a transient region located between 700 AU and 1000 AU. Based on their potential origin, the Damocloids can be classified into two types, depending on their semi-major axes, and about 65.5% of the Damocloids are classified into type I which mainly originate from the Oort cloud. Whether the Damocloids are inactive nuclei of the Halley Family of Comets may depend on their origin. K

关 键 词：methods numerical -- celestial mechanics -- minor planets  asteroids Damocloids 

分 类 号：P185.81[天文地球—天文学] TP333.35[自动化与计算机技术—计算机系统结构]