用DIRBE/COBE观测黄道带光的近红外偏振特性
Near-infrared Polarization Charateristics of the Zodiacal Light Observed with DIRBE/COBE
摘要：
我们报告了由宇宙背景探测器上的漫红外背景实验（DIRBE）在以1.25、2.2和3.5 $μ$ m为中心的光度带中从太空测量的黄道光（ZL）的近红外偏振。为了限制行星际尘埃的物理性质，我们使用DIRBE每周天空图来研究ZL偏振对太阳伸长（$ε$）、黄道纬度（$β$）和波长（$λ$）的依赖性。我们发现ZL的偏振随$ε$和$β$的函数而变化，与在$λ$ = 550 nm处观察到的偏振一致。而在$(ε$、$β)=(90^{\circ}$、$0^{\circ})$处的偏振与波长的相关性是适度的（从1.25 $μ$ m处的17.7 $\pm$ 0.2%增加到3.5 $μ$ m处的21.0 $\pm$ 0.3%），北极的变化更为明显（在1.25、2.2和3.5 $μ$ m处，分别为23.1 $\pm$ 1.6、35.1 $\pm$ 2.0和39.3 $\pm$ 2.1%）。ZL偏振随波长的变化不能用瑞利散射或大于10 $μ$ m的吸收颗粒来解释。
英文摘要：
We report near-infrared polarization of the zodiacal light (ZL) measured from space by the Diffuse Infrared Background Experiment (DIRBE) on board the Cosmic Background Explorer in photometric bands centered at 1.25, 2.2, and 3.5 $μ$m. To constrain the physical properties of interplanetary dust (IPD), we use DIRBE Weekly Sky Maps to investigate the solar elongation ($ε$), ecliptic latitude ($β$), and wavelength ($λ$) dependence of ZL polarization. We find that the polarization of the ZL varies as a function of $ε$ and $β$, consistent with observed polarization at $λ$ = 550 nm. While the polarization dependence with wavelength at $(ε$, $β)=(90^{\circ}$, $0^{\circ})$ is modest (increasing from 17.7 $\pm$ 0.2% at 1.25 $μ$m to 21.0 $\pm$ 0.3% at 3.5 $μ$m), the variation is more pronounced at the North Ecliptic Pole (23.1 $\pm$ 1.6, 35.1 $\pm$ 2.0 and 39.3 $\pm$ 2.1% at 1.25, 2.2 and 3.5 $μ$m, respectively). The variation of ZL polarization with wavelength is not explained by either Rayleigh scattering or by absorptive particles larger than 10 $μ$m.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
