Postdoctoral Fellowship: AAPF: Improved Astrochemical Data for Diffuse Cloud Models: Theoretical Dissociative Recombination Rate Coefficients for OH+, H2O+, and H2Cl+

博士后奖学金：AAPF：改进弥散云模型的天体化学数据：OH、H2O 和 H2Cl 的理论解离重组率系数

• 批准号: 2303895
• 负责人: Joshua Forer
• 金额: $ 33万
• 依托单位: Forer, Joshua
• 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: 2023-10-01 至 2026-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2303895&HistoricalAwards=false
• 关键词: Postdoctoral; Fellowship; AAPF; Improved; Astrochemical

Josh Forer is awarded an NSF Astronomy and Astrophysics Fellowship to carry out a program of research and education at Columbia University. Forer will study microscopic chemical reactions that need to be understood to track the evolution of star-forming gas clouds in galaxies. Additionally, Forer will mentor summer research with the women's undergraduate institution Barnard College, participate in Columbia University's Astronomy Public Outreach program of free public talks, and teach high school students with a strong interest in math and physics.Forer will develop theory and code to describe the dissociative recombination (DR) of OH+, H20+, and H2Cl+ at scattering energies relevant to diffuse cloud temperatures. State-selected rovibronic kinetic DR rate coefficients (needed, but not available) of these ions will be produced to place constraints on the relative abundance of molecular hydrogen, the inferred cosmic-ray ionization rate of atomic hydrogen, and the interstellar radiation field. These constraints allow astrochemical models to map the transition of diffuse interstellar clouds from almost purely atomic to increasingly molecular — a crucial early step in star formation.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.

Josh Forer被授予NSF天文学和天体物理学奖学金，在哥伦比亚大学开展研究和教育计划。Forer将研究微观化学反应，需要了解这些反应以跟踪星系中恒星形成气体云的演变。此外，Forer还将指导女子本科院校巴纳德学院的暑期研究，参加哥伦比亚大学的天文学公共推广计划的免费公开讲座，并教授对数学和物理有浓厚兴趣的高中生。Forer将开发理论和代码来描述OH+，H2O+，和H2 Cl+在散射能量有关的扩散云温度。这些离子的状态选择的旋转振动动力学DR速率系数（需要，但不可用）将产生对分子氢的相对丰度，原子氢的推断宇宙射线电离率和星际辐射场的约束。这些限制使天体化学模型能够绘制出弥漫的星际云从几乎纯原子到越来越分子化的转变--这是星星形成的关键早期步骤。该奖项反映了NSF的法定使命，并被认为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来支持。