在火星交叉人群中首次确认V型小行星
The first confirmation of V-type asteroids among the Mars crosser population
摘要：
火星穿越区域构成了一条将小行星从内主带穿越太空运送到地球的路径。虽然内主带和穿越地球的小行星群都含有相当大比例的V类小行星，但到目前为止，在火星穿越区域只发现了两颗这样的V类小行星。在这项工作中，我们寻找属于V类的小行星在人口中的火星穿越小行星，以支持替代路径的交付这些机构进入地球穿越区域。我们使用斯隆数字巡天移动物体目录中的观测结果在火星穿越区域选择了18颗候选V型小行星。然后，我们使用南方天体物理研究望远镜（SOAR）观察了其中4个候选者的可见光谱。我们还对观测到的小行星的轨道演化进行了数值模拟。我们证实，观测到的小行星中有3颗属于V类，其中一颗可能会沿着一条路径，在数千万年内与地球相撞。
英文摘要：
The Mars crossing region constitutes a path to deliver asteroids from the Inner Main Belt to the Earth crossing space. While both the Inner Main Belt and the population of Earth crossing asteroids contains a significant fraction of asteroids belonging to the V taxonomic class, only two of such V-type asteroids has been detected in the Mars crossing region up to now. In this work, we searched for asteroids belonging to the V class among the population of Mars crossing asteroids, in order to support alternative paths to the delivery of this bodies into the Earth crossing region. We selected 18 candidate V-type asteroids in the Mars crossing region using observations contained in the Sloan Digital Sky Survey Moving Objects Catalog. Then, we observed 4 of these candidates to take their visible spectra using the Southern Astrophysical Research Telescope (SOAR). We also performed the numerical simulation of the orbital evolution of the observed asteroids. We confirmed that 3 of the observed asteroids belong to the V class, and one of these may follow a path that drives it to an Earth collision in some tens of million years.
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