Satellite Galaxies as Probes of Local Non-Linear Structure

卫星星系作为局部非线性结构的探测器

基本信息

批准号：
2009397
负责人：
Tereasa Brainerd
金额：
$ 33.54万
依托单位：
Trustees of Boston University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-08-01 至 2024-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2009397&HistoricalAwards=false
关键词：
Satellite Galaxies Probes Local Non

项目摘要

Models of the formation of galaxies over cosmic time predict that large galaxies should host smaller, satellite galaxies. Observations of these satellites disagree with the number and size predicted by the models. Since these satellites are smaller and fainter than their host galaxies, the number of known systems is small. This project will conduct a survey of nearby host galaxies to get a better census of satellite galaxies and therefore better understand if there is a disagreement between models and observations. The project will also try to improve the standards for admissions to graduate school in astronomy with an effort to increasing diversity in the field. They will also provide public outreach for observational astronomy using the Discovery Channel Telescope.The project will use the Sloan Atlas, combined with the SDSS to identify satellite galaxies of 82 host systems. They will also use the Discovery Channel Telescope to increase the number of satellites with known spectroscopic distance. The project will produce a sample of about 1,300 satellite galaxies about these hosts. The sample will be used to perform statistical studies of the intrinsic clustering, spatial anisotropies, and luminosity functions of these satellite galaxies. The results will be compared with the Illustris TNG cosmological simulations. The PI will work with the department to develop a protocol for explicitly including holistic approaches for graduate admissions with the goal of increasing diversity in the graduate student pool. The PI will also host open night observing sessions for the public at Boston University every clear Wednesday night. Additional scientific literacy outreach will be done at the DCT with a 3-day "Space Beyond Earth" event held for BU alumni.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.

在宇宙时间内形成星系的模型预测，大星系应该容纳较小的卫星星系。这些卫星的观察结果不同意模型预测的数量和大小。由于这些卫星比宿主星系较小且淡淡，因此已知系统的数量很少。该项目将对附近的宿主星系进行调查，以获得更好的卫星星系人口普查，因此更好地了解模型和观察之间是否存在分歧。该项目还将试图提高天文学研究生院的招生标准，以增强该领域的多样性。他们还将使用Discovery频道望远镜为观察天文学提供公共外展。该项目将使用Sloan Atlas，并结合SDSS来识别82个主机系统的卫星星系。他们还将使用发现通道望远镜来增加具有已知光谱距离的卫星数量。该项目将为这些宿主提供约1300个卫星星系的样本。该样品将用于对这些卫星星系的内在聚类，空间各向异性和光度功能进行统计研究。结果将与插图TNG宇宙学模拟进行比较。 PI将与部门合作，开发一项明确的协议，包括用于研究生入学的整体方法，目的是增加研究生池的多样性。 PI还将在周三晚上在波士顿大学举行开放式夜晚观察会议。将在DCT上举行为期3天的“超越地球空间”活动，为BU校友举行的其他科学素养外展活动。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响审查标准，被认为值得通过评估来支持。