论文标题
小行星雷戈尔产生的切向YORP的分析理论
Analytic theory for the tangential YORP produced by the asteroid regolith
论文作者
论文摘要
切向YORP效应是由小行星表面上的结构不对称的热发射产生的辐射压扭矩。这样，以前的作品考虑了小行星表面上不同形状的巨石。 我们研究了小行星雷果石的粗糙界面产生的切向YORP。 我们在略有非平原表面上创建了热传导的近似分析理论。我们分析了有关小行星（162173）Ryugu的小尺度形状的已发表数据，并估计其由于表面粗糙度而导致其切向YORP。 我们得出一个分析公式，该公式以其几何和热性能来表达正弦表面的台风。 Tyorp在统一顺序的热参数和热波长阶的形状不规则之处是最大的。该方程式在Ryugu上的应用预测了Tyorp，这是其正常YORP效应的5-70倍。 小规模的岩石粗糙度对小行星YORP效应的贡献可以与巨石产生的正常YORP和切向YORP相提并论。相同的理论可以描述小行星巨石上的粗糙度，从而在巨石创建的先前考虑的泰尔普中增加了一个新术语。
The tangential YORP effect is a radiation pressure torque produced by asymmetric thermal emission by structures on the asteroid surface. As such structures, previous works considered boulders of different shapes lying on the surface of the asteroid. We study the tangential YORP produced by the rough interface of the asteroid's regolith. We create an approximate analytic theory of heat conduction on a slightly non-flat sinusoidal surface. We analyze the published data on the small-scale shape of the asteroid (162173) Ryugu and estimate its tangential YORP due to the surface roughness. We derive an analytic formula that expresses the TYORP of a sinusoidal surface in terms of its geometric and thermal properties. TYORP is maximal at the thermal parameter of the order of unity and for the shape irregularities of the order of the thermal wavelength. Application of this equation to Ryugu predicts TYORP, which is 5-70 times greater than its normal YORP effect. The contribution of the small-scale regolith roughness to the YORP effect of the asteroid can be comparable to the normal YORP and the tangential YORP produced by boulders. The same theory can describe roughness on the asteroid boulders, thus adding a new term to the previously considered TYORP created by boulders.
