Rotational and Orbital Angular Momentum Evolution: From Self-Embedded Protostars to T-Tauri Stars

旋转和轨道角动量演化：从自嵌入原恒星到 T-Tauri 恒星

• 批准号: 0206146
• 负责人: Mary Barsony
• 金额: --
• 依托单位: SPACE SCIENCE INSTITUTE
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-15 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0206146&HistoricalAwards=false
• 关键词: Rotational; Orbital; Angular; Momentum; Evolution

AST 0206146PI: Mary BarsonyAn understanding of the processes by which stars and planets form remains one of the fundamental goals of astronomy and astrophysics. Although the broad outline of the process has become clear, much remains unexplained, particularly concerning rotational and orbital angular momentum evolution during the pre-main-sequence lifetime of young stellar objects. How and why do multiple systems form from a single infall envelope? What physical mechanisms regulate the rotation rates of young stellar objects? How do rotational velocities evolve with pre-main-sequence evolutionary state? The PI will carry out two major projects to address these questions: 1) a dedicated, comprehensive program for the determination of protostellar rotational periods via near-infrared photometric monitoring to obtain lightcurves, and 2) a systematic near-and mid-infrared, high angular resolution survey of embedded young stellar objects in a single star-forming cloud to discover and characterize the evolution of binary/multiple systems over timescales of 100,000 to 1 million years. ***

AST 0206146PI：Mary Barsonyan对恒星和行星形成的过程的理解仍然是天文学和天体物理学的基本目标之一。 尽管该过程的广泛概述已经变得清晰，但仍无法解释，尤其是关于年轻恒星物体的前序列寿命期间的旋转和轨道角动量的演变。多个系统如何以及为什么从单个插件形成？ 哪些物理机制调节年轻恒星物体的旋转速率？ 旋转速度如何以预先序列的进化状态发展？ PI将执行两个主要项目来解决以下问题：1）通过近红外光度监测来确定原始的，全面的计划，用于确定原稳固的旋转期，以获得光弯曲，以及2）一个系统的近红外，中等，中等，高的，高的高角度分辨率调查，以嵌入了100次跨度的型号，以发现1000次越过的云量，以发现和构图，以发现和构图，以发现量的单个云量，以远程的范围/跨度的范围/跨度的量化，以远程的范围/跨度的范围/均匀的范围/均匀的范围/表征，以循环的范围/均匀的表征，以循环的形式/表现出偶然的变化。 年。 ***