Large-Scale Statistics from Line Intensity Mapping Simulations

线强度映射模拟的大规模统计

• 批准号: 2108411
• 负责人: Anthony Pullen
• 金额: $ 49.44万
• 依托单位: New York University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2108411&HistoricalAwards=false
• 关键词: Large; Scale; Statistics; Line; Intensity

Line Intensity Mapping (LIM), which measures the aggregate line and continuum spectrum within large conical volumes (light-cones), provides a rapid and deep probe of the evolution of galaxies, the interstellar (ISM) and intergalactic (IGM) media, though this information is subtle and encoded in a complex way. Since deep LIM surveys in a diverse set of optical, radio, and millimeter wave lines probing a wide range of physical processes are underway or will soon be, there is a great need for tools to help connect the observables to physical conditions. The research team will combine multiple emission lines generated by semi-analytic models (SAMs) of galaxy formation with existing cosmological simulations to derive a suite of "mock" intensity maps in a self-consistent manner. By varying the SAMs the resulting simulated data sets will inform the calibration and interpretation of LIM surveys. This research will also support research activities by a postdoctoral researcher and a graduate student, as well as efforts by the principal investigator to develop astronomy/cosmology classes for area majority-minority high-schools in New York City.The research team will use SAMs together with existing cosmological simulations to produce sets of light-cones, mock LIM maps and galaxy surveys out to z = 10 for 2-square degree survey fields in order to compute the LIM auto- and cross-power spectrum and 1-point PDF for the 21 cm HI line, various sub/millimeter wave CO transitions, 158 micron [C II] fine structure line, and Hα. They will also simulate astrophysical parameter estimates with these statistics for realistic representative surveys. These will contain optical photometry which will be used for simulated cross-correlations with galaxy surveys such as the Dark Energy Spectroscopic Instrument (DESI). Scientific deliverables released by the team will include halo catalogs and halo merger trees, galaxy catalogs produced by SAMs, broad-band photometry and line properties for N-body snapshots, source catalogs along light-cones, and multi-wavelength LIM and synthetic cosmic infrared background maps. The full suite of simulated survey catalogs and maps will also allow the team to determine how well these statistical measures can constrain the physical processes driving galaxy formation as well as search for synergies between LIM and traditional galaxy surveys.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

线强度测绘（LIM），测量聚合线和连续光谱在大圆锥体（光锥），提供了一个快速和深入的探索星系的演化，星际（ISM）和星系间（IGM）的媒体，虽然这些信息是微妙的，并以复杂的方式编码。由于正在进行或即将进行各种光学，无线电和毫米波线路的深度LIM调查，以探测各种物理过程，因此非常需要工具来帮助将可观测量与物理条件联系起来。研究小组将联合收割机结合星系形成的半解析模型（SAM）产生的多条发射线与现有的宇宙学模拟，以自洽的方式推导出一套“模拟”强度图。通过改变SAM，得到的模拟数据集将为LIM调查的校准和解释提供信息。这项研究还将支持一名博士后研究员和一名研究生的研究活动，以及首席研究员为纽约市地区少数民族高中开发天文学/宇宙学课程的努力。研究小组将使用SAM和现有的宇宙学模拟来制作光锥组，模拟LIM图和2平方度观测场的z = 10的星系观测，以便计算21 cm HI线的LIM自功率谱和互功率谱以及1点PDF，各种亚/毫米波CO跃迁，158微米[C Ⅱ]精细结构线和Hα。他们还将模拟天体物理参数估计与这些统计现实的代表性调查。其中将包括光学光度测量，用于模拟与暗能量光谱仪（DESI）等星系调查的相互关系。该团队发布的科学成果将包括晕目录和晕合并树、SAM产生的星系目录、N体快照的宽带测光和线属性、沿着光锥的源目录以及多波长LIM和合成宇宙红外背景图。全套的模拟调查目录和地图也将使该团队能够确定这些统计措施如何约束驱动星系形成的物理过程，以及寻找LIM和传统星系调查之间的协同作用。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

An Empirical Representation of a Physical Model for the ISM [C ii], CO, and [C i] Emission at Redshift 1 ≤ z ≤ 9

红移 1 ≤ z ≤ 9 处 ISM [C ii]、CO 和 [C i] 发射物理模型的经验表示

• DOI: 10.3847/1538-4357/ac5d57
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Yang, Shengqi;Popping, Gergö;Somerville, Rachel S.;Pullen, Anthony R.;Breysse, Patrick C.;Maniyar, Abhishek S.
• 通讯作者: Maniyar, Abhishek S.

On Estimating the Cosmic Molecular Gas Density from CO Line Intensity Mapping Observations

从CO谱线强度测绘观测估计宇宙分子气体密度

• DOI: 10.3847/1538-4357/ac5a46
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Breysse, Patrick C.;Yang, Shengqi;Somerville, Rachel S.;Pullen, Anthony R.;Popping, Gergö;Maniyar, Abhishek S.
• 通讯作者: Maniyar, Abhishek S.