Cosmology with the Roman Space Telescope – multiprobe strategies
Cosmology with the Roman Space Telescope – multiprobe strategies
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DOI：
10.1093/mnras/stab1762
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发表时间：
2020-04
影响因子：
4.8
通讯作者：
T. Eifler;H. Miyatake;E. Krause;C. Heinrich;V. Miranda;C. Hirata;Jiachuan Xu;S. Hemmati;M. Simet;P. Capak;A. Choi;O. Doré;C. Doux;X. Fang;R. Hounsell;E. Huff;Hung-Jin Huang;M. Jarvis;J. Kruk;D. Masters;E. Rozo;D. Scolnic;D. Spergel;M. Troxel;A. von der Linden-A.-von der Linden-2126570835;Yun Wang;D. Weinberg;L. Wenzl;Hao-Yi Wu
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文献类型：
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作者：
T. Eifler;H. Miyatake;E. Krause;C. Heinrich;V. Miranda;C. Hirata;Jiachuan Xu;S. Hemmati;M. Simet;P. Capak;A. Choi;O. Doré;C. Doux;X. Fang;R. Hounsell;E. Huff;Hung-Jin Huang;M. Jarvis;J. Kruk;D. Masters;E. Rozo;D. Scolnic;D. Spergel;M. Troxel;A. von der Linden-A.-von der Linden-2126570835;Yun Wang;D. Weinberg;L. Wenzl;Hao-Yi Wu
我们模拟的科学性能的南希格雷斯罗马空间望远镜高纬度调查（HLS）的暗能量和修改的重力。目前设想的1.6年HLS参考勘测将在Y、J、H深度为26.5的多个波段中对2000 deg2进行成像，并使用z = 3以外的无缝光谱覆盖相同区域。深度、多波段测光和深度光谱学的结合将使科学家能够通过各种宇宙学探测器（例如弱透镜、星系团、星系团、BAO、Ia型超新星）测量宇宙的生长和几何形状，同样，它将允许对观测和天体物理系统效应进行精确控制。在本文中，我们探讨了多探头的策略，可以实现，望远镜的仪器功能。我们单独和联合宇宙探测模型和帐户相关的系统和统计的不确定性，由于高阶矩的密度场。我们探索不同层次的观测系统的HLS调查（照片Z和剪切校准），并最终运行一个联合似然分析在N维参数空间。我们发现，仅HLS参考巡天就可以在包括所有探测器的情况下实现>300的标准暗能量FoM。这假设没有来自外部数据集的信息，但是我们假设宇宙是平坦的，并且包括系统学的现实假设。我们对HLS参考调查的研究应该被视为未来社区驱动的努力的一部分，以模拟和优化罗马太空望远镜的科学回报。
We simulate the scientific performance of the Nancy Grace Roman Space Telescope High Latitude Survey (HLS) on dark energy and modified gravity. The 1.6-yr HLS Reference survey is currently envisioned to image 2000 deg2 in multiple bands to a depth of ∼26.5 in Y, J, H and to cover the same area with slit-less spectroscopy beyond z = 3. The combination of deep, multiband photometry and deep spectroscopy will allow scientists to measure the growth and geometry of the Universe through a variety of cosmological probes (e.g. weak lensing, galaxy clusters, galaxy clustering, BAO, Type Ia supernova) and, equally, it will allow an exquisite control of observational and astrophysical systematic effects. In this paper, we explore multiprobe strategies that can be implemented, given the telescope’s instrument capabilities. We model cosmological probes individually and jointly and account for correlated systematics and statistical uncertainties due to the higher order moments of the density field. We explore different levels of observational systematics for the HLS survey (photo-z and shear calibration) and ultimately run a joint likelihood analysis in N-dim parameter space. We find that the HLS reference survey alone can achieve a standard dark energy FoM of >300 when including all probes. This assumes no information from external data sets, we assume a flat universe however, and includes realistic assumptions for systematics. Our study of the HLS reference survey should be seen as part of a future community-driven effort to simulate and optimize the science return of the Roman Space Telescope.