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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.

宇宙时间内星系形成的模型预测，大星系应该拥有较小的卫星星系。对这些卫星的观测与模型预测的数量和大小不一致。由于这些卫星星系比它们的宿主星系更小、更暗，所以已知的星系数量很少。该项目将对附近的宿主星系进行调查，以更好地对卫星星系进行普查，从而更好地了解模型和观测之间是否存在分歧。该项目还将努力提高天文学研究生院的入学标准，以增加该领域的多样性。他们还将利用探索频道望远镜为观测天文学提供公众宣传。该项目将使用斯隆地图集，结合SDSS来识别82个主系统的卫星星系。他们还将使用探索频道望远镜来增加已知光谱距离的卫星数量。该项目将产生关于这些宿主的大约1300个卫星星系的样本。该样本将用于对这些卫星星系的本征聚类、空间各向异性和光度函数进行统计研究。结果将与Illustris TNG宇宙模拟进行比较。PI将与该部门合作制定一项协议，明确包括研究生招生的整体方法，目标是增加研究生群体的多样性。PI还将在每个晴朗的周三晚上在波士顿大学为公众举办开放的夜间观察会议。另外，DCT还将为波士顿大学校友举办为期3天的“地球之外的空间”活动，以提高科学素养。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。