论文标题
开发具有角功率光谱的大规模结构数据分析的统一管道-III。实施多追踪技术来限制中微子质量
Developing a unified pipeline for large-scale structure data analysis with angular power spectra -- III. Implementing the multi-tracer technique to constrain neutrino masses
论文作者
论文摘要
在本文中，我们将多迹线技术应用于基于似然的方法的谐波空间（即\ angular）功率谱。这超出了迄今为止在具有角度统计数据的预测中实现的常规Fisher矩阵形式主义，为将来的开发和直接应用程序打开了可用数据集的窗口。我们还发布了公开可用的代码宇宙的全面修改版本，在该版本中，我们始终包含本系列上一篇论文中介绍的所有附加组件。结果是一个模块化宇宙参数估计套件，用于银河数计数的角功率谱，允许单个和多个示踪剂，包括密度波动，红移空间变形和弱透镜放大倍率。我们证明了通过在发光红星系和发射线星系的多跟踪分析中使用多个示踪剂对参数约束的改进。我们获得了$ 44 \％$ $的增强，对中微子质量的总和2σ$上限。我们的代码可在https://github.com/ktanidis/modified_cosmosis_for_galaxy_number_count_count_angular_power_spectra上公开获得。
In this paper, we apply the multi-tracer technique to harmonic-space (i.e.\ angular) power spectra with a likelihood-based approach. This goes beyond the usual Fisher matrix formalism hitherto implemented in forecasts with angular statistics, opening up a window for future developments and direct application to available data sets. We also release a fully-operational modified version of the publicly available code CosmoSIS, where we consistently include all the add-ons presented in the previous papers of this series. The result is a modular cosmological parameter estimation suite for angular power spectra of galaxy number counts, allowing for single and multiple tracers, and including density fluctuations, redshift-space distortions, and weak lensing magnification. We demonstrate the improvement on parameter constraints enabled by the use of multiple tracers on a multi-tracing analysis of luminous red galaxies and emission line galaxies. We obtain an enhancement of $44\%$ on the $2σ$ upper bound on the sum of neutrino masses. Our code is publicly available at https://github.com/ktanidis/Modified_CosmoSIS_for_galaxy_number_count_angular_power_spectra.
