SKYSURF-4:哈勃太空望远镜全色全天面亮度测量方法与结果
天体物理仪器与方法
2023-05-17 v3 宇宙学与河外天体物理
摘要
弥漫、未分辨的天空提供了哈勃太空望远镜(HST)接收的大部分光子,但仍知之甚少。HST档案遗留计划SKYSURF旨在从超过140,000张HST图像中测量0.2-1.6 m天空面亮度(sky-SB)。我们描述了一种为SKYSURF设计的sky-SB测量算法,能够从模拟图像中以1%以内的不确定度恢复输入sky-SB。我们给出了使用该算法在完整SKYSURF数据库上估计的sky-SB测量值。将我们的sky-SB光谱能量分布(SED)与文献中的测量比较显示总体一致。我们的SKYSURF SED还揭示了可能对太阳角的依赖,表明太阳系行星际尘埃对太阳光子非各向同性散射或黄道光存在附加成分。最后,我们基于Carleton等人(2022)的方法更新了近红外弥漫光极限,数值为1.25 m处0.009 MJy sr(22 nW m sr)、1.4 m处0.015 MJy sr(32 nW m sr)、1.6 m处0.013 MJy sr(25 nW m sr)。这些估计提供了该波长范围内迄今最严格的全天约束。SKYSURF sky-SB测量已在SKYSURF官方网站公开,并将用于后续论文中约束弥漫光。
引用
@article{arxiv.2210.08010,
title = {SKYSURF-4: Panchromatic HST All-Sky Surface-Brightness Measurement Methods and Results},
author = {Rosalia O'Brien and Timothy Carleton and Rogier A. Windhorst and Rolf A. Jansen and Delondrae Carter and Scott Tompkins and Sarah Caddy and Seth H. Cohen and Haley Abate and Richard G. Arendt and Jessica Berkheimer and Annalisa Calamida and Stefano Casertano and Simon P. Driver and Connor Gelb and Zak Goisman and Norman Grogin and Daniel Henningsen and Isabela Huckabee and Scott J. Kenyon and Anton M. Koekemoer and Darby Kramer and John Mackenty and Aaron Robotham and Steven Sherman},
journal= {arXiv preprint arXiv:2210.08010},
year = {2023}
}
备注
Revised based on helpful comments from the reviewer, and accepted to AJ on April 12th, 2023. Main paper: 18 pages, 9 figures, 4 tables. Appendices: 16 pages, 10 figures, 1 table. Main results shown in Figure 7 and Table 4