Effects of noise on the interstellar polarization law
Effects of noise on the interstellar polarization law
复制标题
噪声对星际极化定律的影响
DOI：
10.1093/mnras/202.1.173
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发表时间：
1983
影响因子：
4.8
通讯作者：
A. Al
中科院分区：
文献类型：
--
作者：
D. Clarke;A. Al
根据星际偏振波长依赖性的瑟科夫斯基定律，对编目的四色和七色偏振数据进行了重新评估。已经发现，控制p(λ)曲线的峰度的参数(K)不是恒定在1.15，而是与λmax的值相关，λmax是对应于p(λ)的最大值的波长。研究还发现，相关性的形式很大程度上取决于用于测量 p(λ) 的波长值的选择。涉及数据模拟的数值练习表明，实际数据中发现的相关性可能是 p(λ) 测量中随机噪声的伪影。还有人建议，最近一项完善星际定律的提议至少部分反映了与偏振测量相关的随机噪声的影响。
A re-appraisal has been made of catalogued four- and seven-colour polarimetric data in terms of the Serkowski lawfor the wavelength dependence of interstellar polarization. It has been found that the parameter (K) controlling the peakiness of thep(λ) curve is not a constant at 1.15 but that it is correlated with the value ofλmax, the wavelength corresponding to the maximum value ofp(λ). It has also been found that the form of the correlation depends significantly on the choice of the wavelength values used to measurep(λ).A numerical exercise involving data simulation shows that the correlations found in the real data could be an artifact of the random noise on thep(λ) measurements. It is also suggested that a recent proposal to refine the interstellar law reflects, at least partly, the effects of random noise associated with polarimetric measurements.