Research in Infrared and Millimeter Astronomy

红外与毫米天文学研究

• 批准号: 9014399
• 负责人: Steven Beckwith
• 金额: --
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-12-15 至 1993-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9014399&HistoricalAwards=false
• 关键词: Research; Infrared; Millimeter; Astronomy

Recent advances in instrument technology have allowed astronomers their first glimpses of the vestiges of young star formation, circumstellar disks around "T Tauri" stars. A study of both these disks and their central stars is expected to provide fundamental insights into the early evolution of our own solar system. The Principle Investigator (PI) will continue previous research in which he has used infrared and millimeter wavelength interometer arrays to resolve the disk around two T Tauri stars, including clumps of material having masses similar to the planet Jupiter's. In this renewal program the PI will extend his studies to fainter brightnesses and hence will be able to study a statistically stable sample of young stars. The goals are to understand which properties of stars influence disk properties and to examine how the disks evolve in subsamples of progressively older stars. A key question will be to identify the importance of a star's being in a "binary" (a pair of stars born at the same time and orbiting around one another). Current ideas hold that the presence of a close binary star will sweep away the matter from a star and prevent the formation of a disk and hence a system of planets. The PI will test early indications that closely-spaced binaries do not have disks and that single or widely-spaced binaries do. The PI will also extend his observational and data reduction techniques to the infrared-millimeter study of the center of our Galaxy, as well as to shocks in interstellar gas created by the collisions of external galaxies.

仪器技术的最新进展使天文学家 他们第一次瞥见年轻星星形成的痕迹， 围绕着金牛座T星的拱星盘 对这两种情况的研究 盘和它们的中心恒星将提供基本的 对我们太阳系早期演化的深入了解。 的 主要研究者（PI）将继续之前的研究， 他用红外线和毫米波干涉仪 阵列，以解决磁盘周围的两个T金牛星，包括 质量与木星相似的物质团块。 在这个更新计划的PI将扩大他的研究，以微弱 亮度，因此将能够研究一个统计稳定的 年轻恒星的样本 我们的目标是了解 恒星的性质影响盘的性质，并研究如何 这些盘是在逐渐变老的恒星的子样本中演化的。 一个关键 问题将是确定一颗星星存在的重要性， 一个“双星”（一对同时诞生的恒星， 彼此之间）。 目前的观点认为， 近距离双星星星会把星星的物质扫走， 阻止了圆盘的形成，从而阻止了行星系统的形成。 的 PI将测试早期迹象表明，密集的二进制文件不 具有磁盘，而单个或宽间距的二进制文件具有磁盘。 PI还将扩展他的观察和数据简化 技术的红外毫米研究的中心，我们的 银河系，以及冲击产生的星际气体 星系外的碰撞。