CAREER: A multi-faceted investigation of the astromineralogy and evolution of dust around low- and intermediate mass evolved stars

职业：对低质量和中等质量演化恒星周围尘埃的天文学和演化进行多方面的研究

• 批准号: 0642991
• 负责人: Angela Speck
• 金额: $ 48.86万
• 依托单位: University of Missouri-Columbia
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-05-15 至 2013-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0642991&HistoricalAwards=false
• 关键词: CAREER; multi; faceted; investigation; astromineralogy

CAREER: A multi-faceted investigation of the astromineralogy and evolution of dust around low- and intermediate mass evolved starsAbstractAST-0642991PI: Angela K SpeckDr. Speck will study the precise nature of dust grains around low- and intermediate-mass stars (LIMS) because (1) this is where the dust originates before being expelled into the interstellar medium (ISM) and participating in many other astrophysical processes, and thus knowing its initial states will allow for a more accurate prediction of its fate in and effect on the ISM and beyond and (2) the environment around most of these LIMS is relatively benign and thus has simplified chemistry, which facilitates the understanding of the processes in play. Dr. Speck will use a range of techniques including spectroscopy, imaging and modeling, incorporating new laboratory data and taking into account theoretical models and meteoritic studies to provide knowledge of the nature of dust forming around LIMS. This study will also assess how dust formation changes with stellar evolution. In this way, the effect of chemistry and density on dust formation can be determined, allowing testing and refinement of existing models for dust formation and evolution and which can be applied to many astrophysical environments.One of the major problems in investigating circumstellar dust is that it incorporates so many apparently disparate aspects of the physical sciences (physics, astronomy, geology, and chemistry). In order to provide a background and framework for such knowledge, Dr. Speck will introduce an upper level/graduate astrophysics course in cosmochemistry that will be open to students from other departments as well. Dr. Speck's research is specifically designed to involve students at all levels (undergraduate, masters and doctoral) and therefore breaks down into modular chunks. In this way the research undertaken also allows for training of students at these various levels. Dr. Speck will continue her effort to recruit and mentor female graduate students as well as students from other underrepresented groups.This award is funded by the NSF Division of Astronomical Sciences

职业：对低和中间质量进化的尘埃的尘埃和尘埃演变的多方面调查。斑点将研究低和中间质量恒星周围的粉尘颗粒的精确性质（lim），因为（1）这是尘埃在被驱逐到星际培养基（ISM）之前起源于灰尘的地方，并参与许多其他天体物理过程，因此，最初的状态将允许其对ISM和ESM的效果更加准确，并在ISM和环境中进行了更准确的预测（2），并且在（2）的范围内（2）的影响（2）化学，这有助于对游戏过程中的过程的理解。 Speck博士将使用一系列技术，包括光谱，成像和建模，结合新的实验室数据并考虑理论模型和气象研究，以提供有关LIM周围粉尘形成的性质的知识。 这项研究还将评估尘埃形成如何随着恒星进化而变化。通过这种方式，可以确定化学和密度对粉尘形成的影响，从而可以测试和改进尘埃形成和进化的现有模型，并且可以应用于许多天体物理环境中。研究情节灰尘的主要问题之一是，它在物理科学（物理学，天文学，地质学，化学，和化学，和化学，和化学，地质学和化学）中融合了许多明显不同的方面。 为了提供此类知识的背景和框架，Speck博士将在宇宙化学中引入高层/研究生的天体物理学课程，该课程也将向其他部门的学生开放。 Speck博士的研究是专门设计的，旨在让各个级别的学生（本科，硕士和博士学位），因此分解为模块化的块。通过这种方式，进行的研究还允许在这些不同层面上培训学生。 Speck博士将继续努力招募和指导女性研究生以及其他代表性不足的小组的学生。该奖项由NSF天文学科学部资助