Satellites and Dwarf Galaxies as Probes of Dark Matter

卫星和矮星系作为暗物质的探测器

• 批准号: 0407072
• 负责人: Anatoly Klypin
• 金额: $ 21.25万
• 依托单位: New Mexico State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-15 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0407072&HistoricalAwards=false
• 关键词: Satellites; Dwarf; Galaxies; Probes; Dark

AST-0407072KlypinThis project addresses the so-called crisis in cosmology on small scales, using satellites of isolated galaxies, galaxies in nearby voids, and detailed models of rotation curves. Combining the analysis of observations with theory, methods will be used that complement and expand the traditional approach. A full scale Bayesian probabilistic analysis of satellite galaxy kinematics, using the Sloan Digital Sky Survey data, will probe the (mainly dark matter) mass distribution in the peripheral regions of isolated galaxies. A related part of the crisis, the galaxy content of nearby voids, will be analyzed with shallow samples over a large magnitude range, which will then be compared with cosmological simulations. Finally, the accuracy of the reconstruction of mass profiles from rotation curves must depend on galaxy type, and small variations can significantly mar the mass estimates. Therefore, the present research includes the production of publicly available models of disk galaxies embedded in realistic cosmological dark matter halos. The intent is to raise the quality and reliability of results coming from satellite dynamics, and along the way train two female graduate students and provide catalogs and numerical models to the entire community.

AST-0407072 Klypin这个项目利用孤立星系的卫星、附近空洞中的星系和详细的旋转曲线模型，在小尺度上解决了所谓的宇宙学危机。 将观测分析与理论相结合，将使用补充和扩展传统方法的方法。 利用斯隆数字巡天数据对卫星星系运动学进行全面的贝叶斯概率分析，将探测孤立星系外围区域的质量分布（主要是暗物质）。 危机的一个相关部分，附近空洞的星系内容，将在大的星等范围内用浅样本进行分析，然后将其与宇宙学模拟进行比较。 最后，从旋转曲线重建质量分布的准确性必须取决于星系的类型，微小的变化可以显着地破坏质量估计。 因此，目前的研究包括生产的公开可用的模型嵌入在现实的宇宙学暗物质晕盘星系。其目的是提高卫星动力学结果的质量和可靠性，沿着培训两名女研究生，并向整个社区提供目录和数值模型。