SKYSURF-4：泛波段哈勃太空望远镜全天表面亮度测量方法与结果
SKYSURF-4: Panchromatic HST All-Sky Surface-Brightness Measurement Methods and Results
AI总结：
SKYSURF项目利用超过14万张HST图像测量0.2-1.6微米全天表面亮度，提出高精度算法，更新近红外弥散光上限，提供该波段最严格的全天限制。
摘要：
弥散的、未分辨的天空提供了哈勃太空望远镜（HST）接收到的大部分光子，但人们对其了解仍然很少。HST档案遗产项目SKYSURF旨在利用超过140,000张HST图像测量0.2-1.6微米的天空表面亮度（sky-SB）。我们描述了一种为SKYSURF设计的sky-SB测量算法，该算法能够从模拟图像中恢复输入的sky-SB，不确定性在1%以内。我们展示了使用该算法对整个SKYSURF数据库进行估算得到的sky-SB测量结果。将我们的sky-SB光谱能量分布（SED）与文献中的测量结果进行比较，显示出总体一致性。我们的SKYSURF SED还揭示了其可能依赖于太阳角度，这表明太阳光子被行星际尘埃非各向同性散射，或者存在黄道光的额外成分。最后，我们基于Carleton等人（2022）的方法更新了近红外波段的弥散光上限，在1.25微米处为0.009 MJy sr$^{-1}$（22 nW m$^{-2}$ sr$^{-1}$），在1.4微米处为0.015 MJy sr$^{-1}$（32 nW m$^{-2}$ sr$^{-1}$），在1.6微米处为0.013 MJy sr$^{-1}$（25 nW m$^{-2}$ sr$^{-1}$）。这些估计提供了该波长范围内迄今为止最严格的全天限制。SKYSURF的sky-SB测量结果已在SKYSURF官方网站上公开，并将用于未来论文中约束弥散光。
英文摘要：
The diffuse, unresolved sky provides most of the photons that the Hubble Space Telescope (HST) receives, yet remains poorly understood. HST Archival Legacy program SKYSURF aims to measure the 0.2-1.6 $μ$m sky surface brightness (sky-SB) from over 140,000 HST images. We describe a sky-SB measurement algorithm designed for SKYSURF that is able to recover the input sky-SB from simulated images to within 1% uncertainty. We present our sky-SB measurements estimated using this algorithm on the entire SKYSURF database. Comparing our sky-SB spectral energy distribution (SED) to measurements from the literature shows general agreements. Our SKYSURF SED also reveals a possible dependence on Sun angle, indicating either non-isotropic scattering of solar photons off interplanetary dust or an additional component to Zodiacal Light. Finally, we update Diffuse Light limits in the near-IR based on the methods from Carleton et al. (2022), with values of 0.009 MJy sr$^{-1}$ (22 nW m$^{-2}$ sr$^{-1}$) at 1.25 $μ$m, 0.015 MJy sr$^{-1}$ (32 nW m$^{-2}$ sr$^{-1}$) at 1.4 $μ$m, and 0.013 MJy sr$^{-1}$ (25 nW m$^{-2}$ sr$^{-1}$) at 1.6 $μ$m. These estimates provide the most stringent all-sky constraints to date in this wavelength range. SKYSURF sky-SB measurements are made public on the official SKYSURF website and will be used to constrain Diffuse Light in future papers.
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。
