Cosmology with the Roman Space Telescope : synergies with the Rubin Observatory Legacy Survey of Space and Time
Cosmology with the Roman Space Telescope : synergies with the Rubin Observatory Legacy Survey of Space and Time
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罗马太空望远镜的宇宙学：与鲁宾天文台遗产时空调查的协同作用
DOI：
10.1093/mnras/stab533
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发表时间：
2021
影响因子：
4.8
通讯作者：
Heinrich, Chen
中科院分区：
文献类型：
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作者：
Eifler, Tim;Simet, Melanie;Krause, Elisabeth;Hirata, Christopher;Huang, Hung-Jin;Fang, Xiao;Miranda, Vivian;Mandelbaum, Rachel;Doux, Cyrille;Heinrich, Chen
我们探讨了南西格雷斯罗马空间望远镜和维拉鲁宾天文台的时空遗产调查（LSST）之间的协同作用。具体来说，我们考虑了目前设想的罗马空间望远镜高纬度测量（HLS参考）的测量策略，即2000度2英寸的四个窄光度带被改变为有利于在一个波段快速覆盖LSST区域（到整个LSST深度）的策略。我们发现，在短短5个月的时间里，w波段的一次巡天就可以覆盖整个LSST巡天区域，为LSST第10年黄金星系样本提供高达95%的高分辨率成像。我们探索了第二个，更雄心勃勃的场景，即罗马空间望远镜花费1.5年的时间覆盖LSST区域。对于第二种情况，我们通过联合弱透镜和星系聚类分析来量化暗能量状态方程参数的约束功率。我们的调查模拟是基于罗马空间望远镜的曝光时间计算器和CANDELS星表的红移分布。我们的统计不确定性解释了密度场的高阶相关性，我们包括了广泛的系统效应，如形状和红移测量的不确定性，以及天体物理系统学的建模不确定性，如星系偏差、本征星系对准和重子物理。我们发现，与LSST Y10 （FoMHLSwide= 2.4 FoMLSST）和LSST + HLS （FoMHLSwide= 5.5 FoMHLSref）相比，LSST + HLS联合广泛调查的约束能力显著增加。
We explore synergies between theNancy Grace Roman Space Telescopeand the Vera Rubin Observatory’s Legacy Survey of Space and Time (LSST). Specifically, we consider scenarios where the currently envisioned survey strategy for theRoman Space Telescope’s High Latitude Survey (HLS reference), i.e. 2000 deg2in four narrow photometric bands is altered in favour of a strategy of rapid coverage of the LSST area (to full LSST depth) in one band. We find that in only five months, a survey in theW-band can cover the full LSST survey area providing high-resolution imaging for >95 per cent of the LSST Year 10 gold galaxy sample. We explore a second, more ambitious scenario where theRoman Space Telescopespends 1.5 yr covering the LSST area. For this second scenario, we quantify the constraining power on dark energy equation-of-state parameters from a joint weak lensing and galaxy clustering analysis. Our survey simulations are based on theRoman Space Telescopeexposure-time calculator and redshift distributions from the CANDELS catalogue. Our statistical uncertainties account for higher order correlations of the density field, and we include a wide range of systematic effects, such as uncertainties in shape and redshift measurements, and modelling uncertainties of astrophysical systematics, such as galaxy bias, intrinsic galaxy alignment, and baryonic physics. We find a significant increase in constraining power for the joint LSST + HLS wide survey compared to LSST Y10 (FoMHLSwide= 2.4 FoMLSST) and compared to LSST + HLS (FoMHLSwide= 5.5 FoMHLSref).