CAREER: Dwarf Galaxies in Clusters: their structure, globular clusters and dark matter content

职业：星团中的矮星系：它们的结构、球状星团和暗物质含量

• 批准号: 1945310
• 负责人: Laura Sales
• 金额: $ 71.97万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-04-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1945310&HistoricalAwards=false
• 关键词: CAREER; Dwarf; Galaxies; Clusters; their

Although “dark matter” plays an important role in the formation and the complex dynamics of galaxies, there remains a discrepancy between the amount of dark matter predicted versus the amount observed. The PI will conduct a detailed study of the dark matter content of dwarf galaxies found in galaxy clusters. She will use sophisticated computer simulations to improve on current methods, which use observations of globular clusters. These results should lead to insights that could help resolve the controversy concerning the amount of dark matter in the universe. The PI will organize and conduct an annual program on STEM instruction for middle and high school students and their teachers in the Riverside, CA. The instruction will be based upon “hands-on” analysis of astronomical images. Over 4000 middle and high school students are expected participate in this program. This research study will perform detailed hydrodynamical simulations using the Illustris/TNG suite to determine the several paths through which dwarf galaxies start/stop star formation in high density environments, the associated time scales for quenching star formation and its relation to the orbits, mass and in-fall properties of their Galactic Clusters. It will identify the physical processes that drive the differences of dwarf galaxies stellar sizes by comparison with groups and clusters with a control sample of dwarf galaxies simulated in isolation. It will also perform a study on the dark matter content of dwarfs in clusters versus isolated field galaxies and determine if the differences may be traceable to the dynamics of Globular clusters. Finally follow-up zoom-in runs of selected clusters with different resolution and star formation feedback will allow the evaluation of the robustness of the results to numerical choices. The results of these simulations will be used to inform the observations of Globular clusters to correct for the cluster environmental effects when using them to to determine dwarf galaxies dark matter.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.

虽然“暗物质”在星系的形成和复杂的动力学中起着重要的作用，但预测的暗物质数量与观测到的数量之间仍然存在差异。 PI将对星系团中发现的矮星系的暗物质含量进行详细研究。 她将使用复杂的计算机模拟来改进目前使用球状星团观测的方法。这些结果将有助于解决有关宇宙中暗物质数量的争议。PI将组织并开展一项针对加州滨江中学生及其教师的STEM教学年度计划。 该指令将基于对天文图像的“动手”分析。预计将有4000多名初中和高中学生参加这一方案。这项研究将使用Illustris/TNG套件进行详细的流体动力学模拟，以确定矮星系在高密度环境中开始/停止星星形成的几条路径，猝灭星星形成的相关时间尺度及其与其星系团的轨道、质量和落入特性的关系。它将通过与孤立模拟的矮星系控制样本的群体和星系团进行比较，确定驱动矮星系恒星大小差异的物理过程。它还将对星团与孤立场星系中矮星的暗物质含量进行研究，并确定差异是否可追溯到球状星团的动力学。 最后，对具有不同分辨率和星星形成反馈的选定星团进行后续放大运行，将允许评估结果对数值选择的鲁棒性。 这些模拟的结果将用于通知球状星团的观测，以纠正星团环境影响时，使用它们来确定矮星系暗物质。这个奖项反映了NSF的法定使命，并已被认为是值得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的支持。

项目成果

The Next Generation Virgo Cluster Survey. XXXIII. Stellar Population Gradients in the Virgo Cluster Core Globular Cluster System

• DOI: 10.3847/1538-4357/ac63cf
• 发表时间: 2022-04
• 期刊: The Astrophysical Journal
• 作者: Youkyung Ko;E. Peng;Patrick Cot'e;L. Ferrarese;Chengze Liu;A. Longobardi;A. Lançon;R. Muñoz

Degeneracies between self-interacting dark matter and supernova feedback as cusp-core transformation mechanisms

自相互作用暗物质和超新星反馈之间的简并作为尖点-核心转变机制

• DOI: 10.1093/mnras/stac994
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Burger, Jan D.;Zavala, Jesús;Sales, Laura V.;Vogelsberger, Mark;Marinacci, Federico;Torrey, Paul
• 通讯作者: Torrey, Paul

The effects of subgrid models on the properties of giant molecular clouds in galaxy formation simulations

• DOI: 10.1093/mnras/staa3122
• 发表时间: 2020-01
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Hui Li;M. Vogelsberger;F. Marinacci;L. Sales;P. Torrey

H α emission in local galaxies: star formation, time variability, and the diffuse ionized gas

局域星系中的 H α 发射：恒星形成、时间变化和扩散电离气体

• DOI: 10.1093/mnras/stac818
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Tacchella, Sandro;Smith, Aaron;Kannan, Rahul;Marinacci, Federico;Hernquist, Lars;Vogelsberger, Mark;Torrey, Paul;Sales, Laura;Li, Hui
• 通讯作者: Li, Hui

A Near-infrared Look at AGN Feedback in Bulgeless Galaxies

无核球星系中活动星系核反馈的近红外观察

• DOI: 10.3847/1538-4357/ac6870
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Bohn, Thomas;Canalizo, Gabriela;Satyapal, Shobita;Sales, Laura V.
• 通讯作者: Sales, Laura V.