Disk Scaling Relations and their Application as Distance Indicators

磁盘缩放关系及其作为距离指标的应用

• 批准号: 0307396
• 负责人: Martha Haynes
• 金额: $ 18.64万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-15 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307396&HistoricalAwards=false
• 关键词: Disk; Scaling; Relations; their; Application

AST-0307396HaynesThe process of galaxy and disk formation appears to be sufficiently fine-tuned as to produce final configurations that obey simple scaling laws. These relations can be used to probe the processes that govern the structure and evolution of galactic systems, as well as providing a route to the determination of redshift-independent distances. This research builds on previous work on the Tully-Fisher relation and its use as a distance indicator, by exploiting the database now almost completed. Such a rich database of detailed digital data with uniform characteristics will allow a comprehensive exploration of the basis for the Tully-Fisher relation within models of galaxy and disk formation, as well as characterizing the origins and magnitudes of any biases, corrections, and errors. A new peculiar velocity sample will permit the derivation of the bulk flow field in and around the Local Supercluster, and thus a measurement of the local galaxy and mass density of the Universe, crucial to statistical studies of the influence of environment on the properties of nearby galaxies.The database will be made publicly available and as such will be a valuable reference for other workers, and of considerable use for creating public outreach displays. Students at both the graduate and undergraduate level will participate in the analysis, following in the footsteps of previous graduate, summer REU and undergraduate students who have worked with the investigators.

AST-0307396海恩斯星系和盘的形成过程似乎是充分微调，以产生服从简单标度定律的最终配置。 这些关系可以用来探测支配星系系统的结构和演化的过程，以及提供一条确定与红移无关的距离的途径。 这项研究建立在以前的工作的塔利-费舍尔关系和它的使用作为一个距离指标，利用数据库现在几乎完成。 这样一个具有统一特征的详细数字数据的丰富数据库将允许全面探索星系和盘形成模型中的塔利-费舍尔关系的基础，以及表征任何偏差，校正和错误的起源和大小。 一个新的特殊速度样本将允许导出本超星系团内部和周围的整体流场，从而测量本超星系团和宇宙的质量密度，这对环境对附近星系性质影响的统计研究至关重要。数据库将向公众开放，因此将为其他工作者提供宝贵的参考资料。并且对于创建公共外展展示具有相当大的用途。 研究生和本科生都将参与分析，跟随以前的研究生，夏季REU和与研究人员合作的本科生的脚步。