Young Stars and Strong Stellar Activity

年轻的恒星和强烈的恒星活动

• 批准号: 8911596
• 负责人: Gibor Basri
• 金额: $ 17.49万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-15 至 1993-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8911596&HistoricalAwards=false
• 关键词: Young; Stars; Strong; Stellar; Activity

One of the most exciting topics today in the area of stellar evolution is the formation of new stars and of planetary systems. We have convincing observational evidence that these events take place in interstellar clouds of gas and dust that have been compressed sufficiently (by a still poorly understood process) for gravity to pull together locally and at 100s of places the gas and dust. As the matter collapses, its residual angular momentum causes it to rotate more rapidly, resulting in a central condensation and a surrounding disk. Matter from the disk continues to be accreted by the central condensation, which evolves into a T Tauri star. The surrounding disk that remains may give rise to planets. The Principal Investigator (PI) proposes to continue with the optical and infrared observations and the theoretical research of these young stellar objects, which was previously funded by NSF. In particular, he will focus on T Tauri stars, their variability, and the disks that surround many of them. He will also study the magnetic fields associated with the activity cycles of cool stars.

当今恒星领域最令人兴奋的话题之一 演化是新恒星和行星系统的形成。 我们有令人信服的观测证据表明这些事件 在星际气体和尘埃云中， 充分压缩（通过仍然知之甚少的过程）， 引力在局部和100多个地方将气体和 灰尘 当物质坍缩时，它的剩余角动量 使它旋转得更快， 冷凝和周围的圆盘。 圆盘中的物质 继续被中心凝聚所吸积， 变成金牛座T型星星 周围残留的圆盘 上升到行星。 主要研究者（PI）建议继续 光学和红外观测以及 这些年轻的恒星物体，这是以前由国家科学基金会资助。 特别是，他将专注于金牛T星，他们的可变性， 以及围绕着它们的圆盘。 他还将研究 与冷恒星活动周期相关的磁场。