LEAPS-MPS: Where galaxies keep their cool in the heat: A Pathfinder to detect cool cosmic gas filaments and their effects on galaxy properties in clusters.

LEAPS-MPS：星系在高温下保持凉爽的地方：探测冷宇宙气体细丝及其对星团中星系特性的影响的探路者。

• 批准号: 2316862
• 负责人: charlotte welker
• 金额: $ 22.32万
• 依托单位: CUNY New York City College of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2316862&HistoricalAwards=false
• 关键词: LEAPS; MPS; Where; galaxies; keep

On the largest scales, galaxies are found to be arranged along vast networks of filamentary structures, commonly referred to as the cosmic web, that evolved from minute density fluctuations in the very early universe. Recent work by a team including the principal investigator (PI) concluded that cool, low-turbulence gas can flow along the cosmic web and penetrate deep into galaxy clusters and shield galaxies from the hot intra-cluster medium, effectively prolonging their ability to form stars. This research program will allow (1) a more precise characterization of the filamentary "shielding" mechanism on the dynamics and star formation activity of cluster galaxies, with the added potential to (2) indirectly trace the cool gas streams themselves. This program will provide unique research and professional experiences for at least six undergraduate students from groups underrepresented in STEM, with each student acting as a mentor and role model for another student at an earlier career stage.The PI will conduct a follow-up pilot study combining a completed integral-field spectroscopic (IFS) survey of 3,068 low redshift galaxies (SAMI) with mock IFS data cubes for 150,000 galaxies generated using the Horizon-AGN cosmological simulation. The PI and her students will extend the pipeline used to create mock IFS image cubes for simulated galaxies occupying filaments and cluster environments to include newly developed quenching diagnostics. These will be used in conjunction with standard IFS measures of galactic dynamics (e.g., maps of rotational velocity, velocity dispersion, and rotation asymmetry) to find observational signatures best suited to trace galaxy-filament interactions, assess how galaxies are affected by their proximity to intra-cluster filaments, and determine how the merging status of filaments might influence the results. This LEAPS-MPS research program promises to make a significant contribution regarding the interplay between galaxies and the cosmic web.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.

在最大的尺度上，星系被发现是沿着丝状结构的巨大网络排列的，通常被称为宇宙网，它是由早期宇宙中微小的密度波动演变而来的。包括首席研究员（PI）在内的一个团队最近的工作得出结论，凉爽、低湍流的气体可以沿着宇宙网流动，深入星系团，并保护星系免受星系团内热介质的影响，有效地延长了它们形成恒星的能力。这个研究项目将允许(1)对星系团星系动力学和恒星形成活动的丝状“屏蔽”机制进行更精确的表征，并具有(2)间接追踪冷气流本身的附加潜力。该项目将为至少六名来自STEM中代表性不足的群体的本科生提供独特的研究和专业经验，每位学生都将在早期职业阶段为另一名学生提供导师和榜样。PI将进行后续试点研究，结合对3068个低红移星系（SAMI）的完整积分场光谱（IFS）调查，以及使用地平线- agn宇宙学模拟生成的15万个星系的模拟IFS数据立方体。PI和她的学生将扩展用于创建模拟IFS图像立方体的管道，用于模拟占据长丝和星团环境的星系，包括新开发的淬火诊断。这些将与标准的IFS星系动力学测量（例如，旋转速度图、速度色散和旋转不对称）结合使用，以找到最适合追踪星系-细丝相互作用的观测特征，评估星系如何受到它们靠近星系团内细丝的影响，并确定细丝的合并状态如何影响结果。这个leap - mps研究项目有望在星系和宇宙网之间的相互作用方面做出重大贡献。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。