Dust Formation, Mass Loss, and Diameters of Evolved Stars Observed with a Long Baseline Infrared Interferometer

用长基线红外干涉仪观测演化恒星的尘埃形成、质量损失和直径

• 批准号: 9315485
• 负责人: William Danchi
• 金额: $ 22.16万
• 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: 1994
• 资助国家: 美国
• 起止时间: 1994-04-15 至 1997-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9315485&HistoricalAwards=false
• 关键词: Dust; Formation; Mass; Loss; Diameters

9315485 Danchi Many luminous red giant stars eject significant amounts of material from their outer layers. This culminates with the star rapidly becoming a white dwarf. Our knowledge of the mechanism by which the mass is ejected is limited. The conditions in the close vicinity of such stars will be studied. The Berkeley Infrared Spatial Interferometer will be used to determine the distribution of warm dust in the regions where the ejection is taking place. Speckle interferometry and VLBA observations will also be carried out. A primary goal is to relate the variations of the stars to the structure of the ejected dust shell and thus shed light on the ejection mechanism. ***

9315485丹池许多明亮的红巨星从外层喷射出大量的物质。 这一过程的高潮是这颗星星迅速变成一颗白色矮星。 我们对物质被抛射的机理的认识是有限的。 将研究这些恒星附近的条件。 伯克利红外空间干涉仪将用于确定正在发生喷射的区域中的暖尘埃的分布。 还将进行散斑干涉测量和VLBA观测。 一个主要的目标是将恒星的变化与喷出的尘埃壳层的结构联系起来，从而阐明喷出机制。 ***