Positive branch of asteroid polarization: Observational data and computer modeling

被引：4
|
作者：
Petrov, D. V. [1 ]
Kiselev, N. N. [1 ]
机构：
[1] Russian Acad Sci, Crimean Astrophys Observ, Crimea, Russia
来源：
SOLAR SYSTEM RESEARCH | 2017年 / 51卷 / 04期
关键词：
asteroids; polarimetry; polarization phase dependence; matrix form; computer modeling; LIGHT-SCATTERING; GRAIN-SIZE; PARTICLES; SURFACE;
D O I：
10.1134/S0038094617040049
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Observations of near-Earth asteroids at large phase angles made it possible to obtain a more complete (for ground-based observations) phase dependence of the polarization of the E-type asteroids' radiation including the maximum of the positive branch of the linear polarization degree. It is shown that the position of the polarization maximum of high-albedo asteroids is noticeably shifted to the decrease of phase angles compared with S-type asteroids. Model calculations of polarimetric properties of random Gaussian particles that simulate dust particles on the regolith surface are carried out. Model calculations show a qualitatively similar behavior pattern of parameters of the positive polarization branch. The influence of the refractive index of individual scattering particles on the size and position of the maximum of the positive branch of the linear polarization degree is investigated within the considered model.
引用
收藏
页码：271 / 276
页数：6
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