High Resolution Imaging of O-Star Multiple Systems

O-Star 多系统高分辨率成像

• 批准号: 9421606
• 负责人: Zoran Ninkov
• 金额: $ 9.44万
• 依托单位: Rochester Institute of Tech
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-15 至 1998-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9421606&HistoricalAwards=false
• 关键词: Resolution; Imaging; Star; Multiple; Systems

ABSTRACT NINKOV, Zoran AST-9421606 An ongoing investigation into the star formation process has utilized the Rochester Institute of Technology 2K x 2K cooled CCD camera to image OB clusters that are at the core of associations in both the southern and northern hemispheres. These UBVRI images of the central 7' x 7' core regions have allowed study of the initial mass function to lower mass limits than previously determined. In many of these OB cores there is a central, luminous O-star, or multiple system, that dominates the brightness. From CCD images it is apparent that these central O-stars have many more companions than has been cataloged in existing double and multiple star catalogs (e.g. ADS and IDS). The brightness of the central star and the size of the point spread function results in considerable contamination of the secondary star image. Accurate multi-band photometry of the companions would allow for estimation of their spectral types and thus the mass function, and from this is a better understanding of the massive star formation process and the possible origin of runaway stars. The use of the Phillips Laboratory Starfire Optical Range to obtain high resolution images of these central stars, and their companions, in a number of OB clusters, and to permit the reduction and analyses of this data. * * *

摘要 宁科夫，佐兰AST-9421606 正在进行的一项对星星形成过程的调查利用了罗切斯特理工学院的2K x 2K冷却CCD相机对位于南半球和北方半球星协核心的OB星团进行成像。 这些中心7' x 7'核心区域的UBVRI图像允许研究初始质量函数，以降低先前确定的质量极限。 在许多这样的OB核心中，有一个中心的，发光的O星，或多个系统，支配着亮度。 从CCD影像可以明显看出，这些中央O型星的伴星比现有的双星和多星星星表（例如ADS和IDS）中的伴星要多得多。 中心星星的亮度和点扩散函数的大小导致次级星星图像受到相当大的污染。 精确的多波段测光的同伴将允许估计他们的光谱类型，从而质量函数，并从这是一个更好地了解大质量的星星的形成过程和可能的起源失控的恒星。 利用菲利普斯实验室星火光学范围获得这些中心恒星的高分辨率图像，和他们的同伴，在一些OB集群，并允许减少和分析这些数据。 * * *