论文标题
确定10 Vesta家族小行星的大小，反照率和热惯性，具有明智/新的观测
Determination of size, albedo and thermal inertia of 10 Vesta family asteroids with WISE/NEOWISE observations
论文作者
论文摘要
在这项工作中，我们根据主要由NASA的热红外数据（主要是NASA的广场红外红外测量探索者（WISE）获得的热红外数据，研究了10 Vesta家族小行星的大小，热惯性，表面粗糙度和几何反照率。在这里，我们表明，所研究的Vesta家族成员的平均热惯性和几何反照率为42 $ \ rm J M^{ - 2} S^{ - 1/2} k^{ - 1} $和0.314和0.314，派生有效直径小于10公里。此外，家庭成员在表面上的粗糙度分数相对较低。 V型Vesta家族成员中热惯性和几何反照率的相似性可能会揭示其在起源和进化中的紧密联系。作为Vesta碎屑事件的碎片，家庭成员可能经历了相似的演化过程，从而导致非常紧密的热性能。最后，我们用不同的体积填充因子估算了它们的岩石晶粒尺寸。
In this work, we investigate the size, thermal inertia, surface roughness and geometric albedo of 10 Vesta family asteroids by using the Advanced Thermophysical Model (ATPM), based on the thermal infrared data acquired by mainly NASA's Wide-field Infrared Survey Explorer (WISE). Here we show that the average thermal inertia and geometric albedo of the investigated Vesta family members are 42 $\rm J m^{-2} s^{-1/2} K^{-1}$ and 0.314, respectively, where the derived effective diameters are less than 10 km. Moreover, the family members have a relatively low roughness fraction on their surfaces. The similarity in thermal inertia and geometric albedo among the V-type Vesta family member may reveal their close connection in the origin and evolution. As the fragments of the cratering event of Vesta, the family members may have undergone similar evolution process, thereby leading to very close thermal properties. Finally, we estimate their regolith grain sizes with different volume filling factors.
