可见光中的消光曲线和Rv的值。第II部分：AN 333、160的附录
The Extinction Curve in the Visible and the Value of Rv. Part II: Addendum to AN 333, 160
摘要：
本文修正和完善了前人对可见光消光曲线形状和Rv值的研究。在观测精度范围内，与1/λ^p成比例的连续可见光/红外消光定律（p接近1（{ \pm }0.4）与可见光中的完全线性定律（p = 1）是无法区分的，但红外曲线的形状可以大大修改。p值略大于1将解释λ > 1μm时消光系数的增加（与p = 1定律相比），并深刻影响Rv值。如果p = 1，则在不存在灰色消光的情况下，Rv必须为4.04。p = 1.25时为3.14，p = 1.30时为3.00，p = 1.40时为2.76。接近1.3的p值也归因于大气气溶胶的消光，这表明这两种现象可能受相似的颗粒尺寸分布的影响。功率消光定律可以将可见光和红外数据协调成单一的、连续的和普遍的星际消光定律。
英文摘要：
This paper corrects and completes a previous study of the shape of the extinction curve in the visible and the value of Rv. A continuous visible/infrared extinction law proportional to 1/λ^p with p close to 1 ({\pm}0.4) is indistinguishable from a perfectly linear law (p = 1) in the visible within observational precision, but the shape of the curve in the infrared can be substantially modified. Values of p slightly larger than 1 would account for the increase of extinction (compared to the p = 1 law) reported for λ > 1μm and deeply affect the value of Rv. In the absence of gray extinction Rv must be 4.04 if p = 1. It becomes 3.14 for p = 1.25, 3.00 for p = 1.30, and 2.76 for p = 1.40. Values of p near 1.3 are also attributed to extinction by atmospheric aerosols, which indicates that both phenomena may be governed by similar particle size distributions. A power extinction law may harmonize visible and infrared data into a single, continuous, and universal, interstellar extinction law.
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