Postdoctoral Fellowship: AAPF: All Shook Up: Understanding the Chemistry, Dynamics, and Kinematics of the Diffuse Interstellar Medium

博士后奖学金：AAPF：一切都震惊了：了解弥漫星际介质的化学、动力学和运动学

• 批准号: 2303902
• 负责人: Daniel Rybarczyk
• 金额: $ 33万
• 依托单位: Rybarczyk, Daniel R
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-07-01 至 2026-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2303902&HistoricalAwards=false
• 关键词: Postdoctoral; Fellowship; AAPF; Shook; Up

Daniel Rybarczyk is awarded an NSF Astronomy and Astrophysics Fellowship to carry out a program of research and education at the University of Wisconsin–Madison. Rybarczyk will use radio/millimeter observations of atomic hydrogen (HI) and various molecular species to study the role of shocks in shaping the structure and chemistry of the diffuse interstellar medium (ISM). Rybarczyk will measure the abundances of these key ISM constituents in regions where molecule formation is just getting under way to understand the first steps in the process of molecular cloud formation, which plays a critical role in star formation and galaxy evolution. Rybarczyk will also conduct an outreach program hosting public school visits (with a focus on schools with students from groups historically underrepresented in STEM fields) to the University of Wisconsin–Madison's Astronomy Department, including its planetarium and Washburn Observatory.Recent work has argued that shocks are crucial to the physical and chemical evolution of the diffuse ISM, playing a vital role in the very first stages of the star formation process, but direct observations of shock tracers in these environments are rare. Rybarczyk will roughly triple the existing sample of diffuse sightlines with observations of the molecule SiO — generally believed to be an unambiguous tracer of interstellar shocks — in the diffuse ISM, targeting directions where shock chemistry is implied by indirect tracers or filamentary structure. These measurements and a comparison to non-equilibrium chemical model predictions will test our understanding of shock chemistry in a low-density regime largely unexplored in the existing literature. Further observations of the molecules HCO+ and CO will complement the SiO measurements, probing the molecular gas content of the diffuse ISM and testing our ability to detect diffuse molecular gas using different tracers.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.

Daniel Rybarczyk 获得美国国家科学基金会天文学和天体物理学奖学金，在威斯康星大学麦迪逊分校开展研究和教育项目，Rybarczyk 将利用对原子氢 (HI) 和各种分子物种的无线电/毫米波观测来研究激波的作用。在塑造弥漫星际介质（ISM）的结构和化学过程中，Rybarczyk 将测量分子形成刚刚开始的区域中这些关键 ISM 成分的丰度。了解分子云形成过程的第一步，分子云在恒星形成和星系演化中发挥着关键作用，Rybarczyk 还将开展一项外展计划，接待公立学校参观活动（重点关注来自 STEM 领域历史上代表性不足的群体的学校）。 ）到威斯康星大学麦迪逊分校天文系，包括其天文馆和沃什伯恩天文台。最近的研究表明，激波对于弥漫性 ISM 的物理和化学演化至关重要，在最初阶段发挥着至关重要的作用。恒星形成过程，但在这些环境中对冲击示踪剂的直接观测很少见，与在弥漫的 ISM 中对 SiO 分子（通常被认为是星际冲击的明确示踪剂）的观测相比，Rybarczyk 的观测值大约是现有的扩散视线样本的三倍。这些测量以及与非平衡化学模型预测的比较将测试我们对很大程度上低密度状态下的冲击化学的理解。对分子 HCO+ 和 CO 的进一步观察将补充 SiO 测量，探测扩散 ISM 的分子气体含量并测试我们使用不同示踪剂检测扩散分子气体的能力。该奖项反映了 NSF 的法定使命，并具有通过使用基金会的智力优点和更广泛的影响审查标准进行评估，被认为值得支持。