论文标题
北半球太阳能星的近红外光谱表征
Near-infrared Spectral Characterization of Solar-type Stars in the Northern Hemisphere
论文作者
论文摘要
尽管在过去的几十年中已经对太阳能分析星进行了广泛的研究，但这些研究中的大多数都集中在可见的波长上，尤其是那些识别太阳能分析恒星的那些研究。结果，缺乏特征良好的太阳能类似物，可在近红外观察，这对于研究太阳系对象很重要。我们提出了基于太阳能光谱类型以及V-J和V-K颜色选择的184颗恒星，我们在0.8-4.2微米范围内观察到的光谱以校准我们的小行星观测值。每个恒星都基于光谱与审查的太阳能类似物相似，将每个恒星分为三个等级之一。在我们的一组184颗恒星中，我们报告145个作为可靠的太阳能分析星，21个作为频谱校正后可用的太阳能类似物，具有低阶多项式拟合，而18个不适合用作光谱形状，可变性或低至中分辨率的特征，则不适合用作校准标准。我们得出的结论是，除5个候选人外，所有候选者都是可靠的太阳能类似物，较长的波长范围为2.5至4.2微米。恒星的平均颜色分类为可靠或可用的太阳能类似物为V-J = 1.148，V-H = 1.418和V-K = 1.491，整个组合在R.A.中的分布相当均匀。在DECL中，在-27至+67度之间的天空之间。
Although solar-analog stars have been studied extensively over the past few decades, most of these studies have focused on visible wavelengths, especially those identifying solar-analog stars to be used as calibration tools for observations. As a result, there is a dearth of well-characterized solar analogs for observations in the near-infrared, a wavelength range important for studying solar system objects. We present 184 stars selected based on solar-like spectral type and V-J and V-K colors whose spectra we have observed in the 0.8-4.2 micron range for calibrating our asteroid observations. Each star has been classified into one of three ranks based on spectral resemblance to vetted solar analogs. Of our set of 184 stars, we report 145 as reliable solar-analog stars, 21 as solar analogs usable after spectral corrections with low-order polynomial fitting, and 18 as unsuitable for use as calibration standards owing to spectral shape, variability, or features at low to medium resolution. We conclude that all but 5 of our candidates are reliable solar analogs in the longer wavelength range from 2.5 to 4.2 microns. The average colors of the stars classified as reliable or usable solar analogs are V-J=1.148, V-H=1.418, and V-K=1.491, with the entire set being distributed fairly uniformly in R.A. across the sky between -27 and +67 degrees in decl.
