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arXiv 1408.7080astro-ph.EP
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外主带V型光度候选者的动力学演化

Dynamical evolution of V-type photometric candidates in the outer Main-belt

Mariela E. Huaman, Valerio Carruba, Rita Cassia Domingos

摘要:

V型小行星的特征是在1.0和2.0 $μm$处有两个吸收带,通常被认为是分异或部分分异天体的地壳部分。大多数V型小行星都是在主带内发现的,被认为是灶神星动力家族的当前或过去成员。最近,在中央和外部主带中已经确定了几个V型光度候选者。虽然最近对中央主带中V型光度候选者的动力学演化进行了研究,但对整个外主带中玄武岩物质的轨道演化关注较少。在这里,我们确定了已知的和新的V型光度候选人在这一地区,并研究其轨道演化的引力和非引力的影响下。假设至少有三个可能与(349)Dembowska,(221)Eos和(1459)Magnya的母天体有关的本地源,原则上可以解释该区域V型测光候选者的当前轨道分布。

英文摘要:

V-type asteroids, characterized by two absorption bands at 1.0 and 2.0 $μm$, are usually thought to be portions of the crust of differentiated or partially differentiated bodies. Most V-type asteroids are found in the inner main belt and are thought to be current or past members of the Vesta dynamical family. Recently, several V-type photometric candidates have been identified in the central and outer main belt. While the dynamical evolution of V-type photometric candidates in the central main belt has been recently investigated, less attention has been given to the orbital evolution of basaltic material in the outer main belt as a whole. Here we identify known and new V-type photometric candidates in this region, and study their orbital evolution under the effect of gravitational and non-gravitational forces. A scenario in which a minimum of three local sources, possibly associated with the parent bodies of (349) Dembowska, (221) Eos, and (1459) Magnya, could in principle explain the current orbital distribution of V-type photometric candidates in the region.

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