论文标题
近红外的小行星偏光相行为：S-和C复合物体
Asteroid Polarimetric-Phase Behavior in the Near-Infrared: S- and C-Complex Objects
论文作者
论文摘要
我们使用palomar 200英寸望远镜上的WIRC+POL仪器对小行星极化相曲线进行了对小行星极化相曲线的调查的第一个结果。我们通过对标准恒星的观察确认WIRC+POL可以达到小行星相曲线表征所需的0.1％精度，并表明C-复合小行星可以作为替代校准源，因为它们显示出比恒星极化标准的波长较小的波长。 S-复合小行星的初始极化相曲线的结果显示，行为的变化是波长从可见的到近红外带的函数，从而扩展了先前观察到的趋势。单个小行星的完全近红外极化相曲线表征将通过探测反照率的波长依赖性和表面材料的折射索引来对这些物体的表面组成产生独特的约束。
We present the first results of our survey of asteroid polarization-phase curves in the near-infrared J and H bands using the WIRC+Pol instrument on the Palomar 200-inch telescope. We confirm through observations of standard stars that WIRC+Pol can reach the 0.1% precision needed for asteroid phase curve characterization, and show that C-complex asteroids could act as an alternate calibration source as they show less wavelength variation than stellar polarized standards. Initial polarization-phase curve results for S-complex asteroids show a shift in behavior as a function of wavelength from visible to near-infrared bands, extending previously observed trends. Full near-infrared polarization-phase curve characterization of individual asteroids will provide a unique constraint on surface composition of these objects by probing the wavelength dependence of albedo and index of refraction of the surface material.
