论文标题
中型木星特洛伊木马人口中的ALMA搜索高反照率物体
An ALMA search for high albedo objects among the mid-sized Jupiter Trojan population
论文作者
论文摘要
我们从中型（直径15-40 km）木星木马小行星的样品中使用ALMA测量值870 $ $ M $ M的热发射，以在该人群中搜索高反照率物体。我们使用热模型计算每个对象的直径和反照率，该模型还结合了{同时} Zwicky瞬态设施光度法，以准确测量ALMA观察时的绝对幅度。我们发现，尽管许多反照率低于Wise报告的，但几个小型木马具有高反照率，从Alma和Wise中独立测量。这些高反照率物体的数量大致与对最近受到大规模影响的物体数量的期望相一致，这表明新鲜认证的木星特洛伊木马的内部可能包含诸如ICES等高架材料。
We use ALMA measurements of 870 $μ$m thermal emission from a sample of mid-sized (15-40 km diameter) Jupiter Trojan asteroids to search for high albedo objects in this population. We calculate the diameters and albedos of each object using a thermal model which also incorporates {contemporaneous} Zwicky Transient Facility photometry to accurately measure the absolute magnitude at the time of the ALMA observation. We find that while many albedos are lower than reported from WISE, several small Trojans have high albedos independently measured both from ALMA and from WISE. The number of these high albedo objects is approximately consistent with expectations of the number of objects that recently have undergone large-scale impacts, suggesting that the interiors of freshly-crated Jupiter Trojans could contain high albedo materials such as ices.
