Stronger together: Joint probes for the measurement of the neutrino mass using the Hyper Suprime-Cam survey

强强联手：使用 Hyper Suprime-Cam 巡天测量中微子质量的联合探测器

• 批准号: 17K14274
• 负责人: Kwan Juliana
• 金额: $ 2.58万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2017
• 资助国家: 日本
• 起止时间: 2017-04-01 至 2019-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17K14274/
• 关键词: cosmology; large scale structure; Weak lensing; cosmological parameters

One of the main goals of this project is to develop an analysis pipeline that could look for the effects of massive neutrinos in cosmological observables such as weak lensing and galaxy clustering. In particular, I proposed to develop a fast prediction scheme based on Gaussian Process regression, called emulators, to make theoretical predictions for these observational quantities based on the halo bias and halo mass function. Another goal was to analyze the redshift space clustering statistics from the Hyper Suprime Cam Survey using the emulators.1.1. Analysis of N-body simulations. I developed tools to analyze the outputs of N-body simulations in redshift space. I measured the monopole and quadrupole correlation functions from N-body simulations using a halo occupation distribution model to model a mock galaxy population. I studied the effect of changing the galaxy properties as well as the effect of adding velocity bias.I further investigated the halo bias by complementing my existing analysis with bias measurements from clustering statistics.1.2. Development of Prediction Tools. I continued to develop prediction tools for the analysis of galaxy clustering data, especially those that can be used in redshift space. I performed a detailed study of the parameter space of galaxy properties needed to be covered by the emulator in order for it to be applied to a survey.I also investigated the possibility of using other statistics, e.g. correlation function, but I found that the sizes of the simulations weren't suffcient.

该项目的主要目标之一是开发一个分析管道，可以在宇宙观测中寻找大质量中微子的影响，如弱透镜效应和星系群集。特别是，我提出了一种基于高斯过程回归的快速预测方案，称为模拟器，基于晕偏和晕质量函数对这些观测量进行理论预测。另一个目标是使用模拟器分析Hyper prime Cam Survey的红移空间聚类统计数据。n体仿真分析。我开发了工具来分析红移空间中n体模拟的输出。我测量了n体模拟的单极子和四极子相关函数，使用晕占分布模型来模拟星系人口。我研究了改变星系属性的效果，以及增加速度偏差的效果。我进一步研究了光环偏差，补充了我现有的分析与来自聚类统计的偏差测量。预测工具的发展。我继续开发用于分析星系团数据的预测工具，特别是那些可以在红移空间中使用的工具。我对模拟器需要覆盖的星系属性参数空间进行了详细的研究，以便将其应用于调查。我还研究了使用其他统计数据的可能性，例如相关函数，但我发现模拟的规模不够。

项目成果

Halo Bias in Massive Neutrino Cosmologies

大质量中微子宇宙学中的光环偏差

• 发表时间: 2018
• 作者: Lawrence Earl;Heitmann Katrin;Kwan Juliana;Upadhye Amol;Bingham Derek;Habib Salman;Higdon David;Pope Adrian;Finkel Hal;Frontiere Nicholas;Juliana Kwan
• 通讯作者: Juliana Kwan

Cosmology from the Dark Energy Survey

暗能量巡天的宇宙学

• 发表时间: 2017
• 作者: Lawrence Earl;Heitmann Katrin;Kwan Juliana;Upadhye Amol;Bingham Derek;Habib Salman;Higdon David;Pope Adrian;Finkel Hal;Frontiere Nicholas;Juliana Kwan;Juliana Kwan;Juliana Kwan
• 通讯作者: Juliana Kwan

The Mira-Titan Universe. II. Matter Power Spectrum Emulation

• DOI: 10.3847/1538-4357/aa86a9
• 发表时间: 2017-05
• 期刊: The Astrophysical Journal
• 作者: E. Lawrence;K. Heitmann;J. Kwan;A. Upadhye;D. Bingham;S. Habib;D. Higdon;A. Pope;H. Finkel;N. Frontiere

Gaussian Processes in Cosmology

宇宙学中的高斯过程

• 发表时间: 2018
• 作者: Lawrence Earl;Heitmann Katrin;Kwan Juliana;Upadhye Amol;Bingham Derek;Habib Salman;Higdon David;Pope Adrian;Finkel Hal;Frontiere Nicholas;Juliana Kwan;Juliana Kwan
• 通讯作者: Juliana Kwan

Cosmology from probes of clustering and weak lensing

来自星团和弱透镜探测的宇宙学

• 发表时间: 2017
• 作者: Lawrence Earl;Heitmann Katrin;Kwan Juliana;Upadhye Amol;Bingham Derek;Habib Salman;Higdon David;Pope Adrian;Finkel Hal;Frontiere Nicholas;Juliana Kwan;Juliana Kwan;Juliana Kwan;Juliana Kwan
• 通讯作者: Juliana Kwan