面向暗能量科学的 LSST 观测策略优化：DESC 对宽-快-深巡天的建议
天体物理仪器与方法
2018-12-17 v2
摘要
宇宙学是 LSST 的四大科学支柱之一，有望对我们理解暗能量与暗物质带来变革。LSST 暗能量科学合作组（DESC）受命从 LSST 数据推导宇宙学参数约束。LSST 的每种宇宙学探针都深受观测策略选择的影响。本白皮书由代表整个合作组的 LSST DESC 观测策略工作组（OSTF）撰写，旨在提出有益于 LSST 所有宇宙学分析的观测策略建议。它附有 DESC DDF（深钻场）白皮书（Scolnic 等）。我们使用多种度量来理解观测策略对弱引力透镜、大尺度结构、星系团、测光红移、超新星、强引力透镜与千新星测量的影响。为降低系统不确定性，我们得出结论：当前基线观测策略需大幅修改以得到最佳宇宙学约束。我们提供若干关键建议：移动 WFD（宽-快-深）足迹以避开高消光区、以不同滤光片拍摄访问对、将 2×15s 快照改为单次曝光以提升效率、聚焦减少观测间长间隙（>15 天）的策略，以及在 10 年巡天中若干阶段优先保障空间均匀性。
引用
@article{arxiv.1812.00515,
title = {Optimizing the LSST Observing Strategy for Dark Energy Science: DESC Recommendations for the Wide-Fast-Deep Survey},
author = {Michelle Lochner and Daniel M. Scolnic and Humna Awan and Nicolas Regnault and Philippe Gris and Rachel Mandelbaum and Eric Gawiser and Husni Almoubayyed and Christian N. Setzer and Simon Huber and Melissa L. Graham and Renée Hložek and Rahul Biswas and Tim Eifler and Daniel Rothchild and Tarek Allam and Jonathan Blazek and Chihway Chang and Thomas Collett and Ariel Goobar and Isobel M. Hook and Mike Jarvis and Saurabh W. Jha and Alex G. Kim and Phil Marshall and Jason D. McEwen and Marc Moniez and Jeffrey A. Newman and Hiranya V. Peiris and Tanja Petrushevska and Jason Rhodes and Ignacio Sevilla-Noarbe and Anže Slosar and Sherry H. Suyu and J. Anthony Tyson and Peter Yoachim},
journal= {arXiv preprint arXiv:1812.00515},
year = {2018}
}
备注
The LSST DESC response (WFD) to the Call for White Papers on LSST Cadence Optimization. Comments welcome