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外文期刊>The astronomical journal
>Determination of Size, Albedo, and Thermal Inertia of 10 Vesta Family Asteroids with WISE/NEOWISE Observations Haoxuan Jiang1,2, Jianghui Ji1,3, and Liangliang Yu4
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Determination of Size, Albedo, and Thermal Inertia of 10 Vesta Family Asteroids with WISE/NEOWISE Observations Haoxuan Jiang1,2, Jianghui Ji1,3, and Liangliang Yu4
In this work, we investigate the size, thermal inertia, surface roughness, and geometric albedo of 10 Vesta family asteroids using the Advanced Thermophysical Model, based on the thermal-infrared data acquired by mainly NASA's Wide-field Infrared Survey Explorer.Here, we show that the average thermal inertia and geometric albedo of the investigated Vesta family members are 42 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 members may reveal their close connection in origin and evolution.As the fragments of the cratering event of Vesta, the family members may have undergone a similar evolutionary process, thereby leading to very close thermal properties.Finally, we estimate their regolith grain sizes with different volume filling factors.
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