CAREER: The Role of Stellar Feedback in Star Formation

职业：恒星反馈在恒星形成中的作用

• 批准号: 1650486
• 负责人: Stella Offner
• 金额: $ 42.91万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-09-01 至 2017-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1650486&HistoricalAwards=false
• 关键词: CAREER; Role; Stellar; Feedback; Star

The investigator's group will write detailed computer-models of how stars are born from gas in our galaxy. All stars are born in large clouds of gas in galaxies, which condense to form stars and planets. The investigator will write new computer models for the physics that determines the mass of new stars. She will also study how neighboring young stars influence each other and their birth environment by injecting energy into their surroundings. Evidence suggests our Sun formed together with thousands of siblings, which may have shaped our Sun?s properties. However, why stars like our Sun have the masses they do remains debated. Her team will model how stars interact with their birth environment and test different theories for the origin of star masses. The investigator will produce synthetic observations of the models and compare these to telescope observations of star-forming regions in our Milky Way galaxy. The educational goal of the project is to increase participation and diversity in STEM. The investigator will use the World Wide Telescope (WWT) educational software to communicate recent exciting astronomy discoveries to the public. She will use WWT to create interactive labs for several local underserved populations, will also organize research training and organize an annual star formation symposia.The proposal aims to explore two fundamental questions in star formation: How do stars obtain their masses? What sets the star formation rate in molecular clouds? The PI will address these questions by performing multi-physics numerical simulations of forming star clusters including outflow, wind and radiation feedback. The three key science objectives are to 1) constrain the importance of core masses in setting the stellar initial mass function, 2) evaluate the influence of feedback on turbulence and star formation efficiency, and 3) bridge simulations and observations using "apples-to-apples" comparisons. The investigator will produce synthetic observations of the models and compare directly to observations, harnessing thousands of hours of current and planned large- scale surveys probing dense gas, proto-stellar outflows with very fine resolution.

调查员小组将撰写详细的计算机模型，内容涉及星系中的星星如何出生。 所有恒星都出生在星系中的大量气体中，这些气体凝结为形成恒星和行星。 研究人员将为确定新恒星质量的物理学编写新的计算机模型。她还将通过向周围环境注入能量来研究邻近的年轻明星如何相互影响和他们的出生环境。有证据表明，我们的太阳与数千个兄弟姐妹一起形成，这可能塑造了我们的太阳特性。 但是，为什么像我们的太阳这样的明星都有他们所做的群众仍在辩论。她的团队将建模星星如何与他们的出生环境互动，并测试不同理论的星际群众。 研究人员将对模型进行合成观察结果，并将其与我们银河系中的星形区域的望远镜观测值进行比较。 该项目的教育目标是增加STEM的参与和多样性。 研究人员将使用万维网望远镜（WWT）教育软件向公众传达令人兴奋的天文学发现。 她将使用WWT为几个当地服务不足的人群创建互动实验室，还将组织研究培训并组织一年的星级形成研讨会。该提案旨在探索恒星形成中的两个基本问题：恒星如何获得群众？是什么设定了分子云中的恒星形成率？ PI将通过对形成星形簇（包括流出，风和辐射反馈）的多物理数值模拟来解决这些问题。 这三个关键的科学目标是1）限制核心质量在设置出色的初始质量功能中的重要性，2）评估反馈对湍流和恒星形成效率的影响，以及3）使用“苹果对苹果对苹果”比较的桥梁模拟和观察值。 研究者将产生模型的合成观察结果，并直接与观测值进行比较，并利用数千个小时的当前和计划的大规模调查，探测密集的气体，原始史诗般的流出，分辨率非常好。