Collaborative Research: Unveiling Dark Matter in Dwarf Spheroidal Galaxies

合作研究：揭示矮球状星系中的暗物质

• 批准号: 0507511
• 负责人: Edward Olszewski
• 金额: $ 9.2万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0507511&HistoricalAwards=false
• 关键词: Collaborative; Research; Unveiling; Dark; Matter

AST-0507511OlszewskiThough it permeates the entire Universe, dark matter (DM) remains as elusive today as when its gravitational signature was first noted. Fortunately, dwarf galaxies continue to offer a unique window into the nature of DM, as they are host to the smallest known DM structures and may represent the survivors of a vast primordial population. Unfortunately, dwarf galaxy studies rely on observing the motions of individual stars and their interpretation by models, and this is flawed both by having only small samples for any one galaxy, and by requiring highly restrictive assumptions to obtain an answer. It is now possible to obtain samples of thousands of stars in nearby dwarf spheroidal galaxies, where it was previously usual to have only tens of stars. At the same time, new, far more sophisticated non-parametric statistical techniques are being developed, which not only include tests of some of the standard dynamical assumptions, but also may offer ways to relax some of those assumptions. The ultimate goal of this research is a kinematical model with the fewest possible assumptions being confronted with the maximum number of discrete velocities in all of the nearby dwarf spheroidal galaxies.This close collaboration between astronomers and statisticians links researchers at two universities, including students who can continue this collaborative tradition, and serves the entire astronomical community through the provision of new equipment and the widespread availability of the data and the statistical methods. The results will feed into public and K-5 outreach, which are already a regular part of each researcher's activities.

AST-0507511OLSZEWSKITHOUGHTOUGH渗透到整个宇宙中，暗物质（DM）仍然像首先注意到其重力签名时一样难以捉摸。 幸运的是，矮星系继续为DM的性质提供独特的窗口，因为它们是最小的DM结构，并且可能代表了广阔的原始人群的幸存者。 不幸的是，矮星系研究依赖于观察单个恒星的动作及其通过模型的解释，这两者都仅对任何一个星系都有少量样本，以及需要高度限制性的假设才能获得答案。 现在可以在附近的矮球星系中获取数千颗恒星的样品，以前通常只有数十颗恒星。 同时，正在开发新的，更复杂的非参数统计技术，这不仅包括对某些标准动力学假设的测试，而且还可以提供放松某些假设的方法。 这项研究的最终目标是一个运动模型，最少的假设正面临着附近所有附近所有矮人的球形星系中最大的离散速度数量，这是天文学家与统计学家之间的紧密合作联系，包括两个大学的研究人员，包括能够继续进行此类协作传统的学生，并为整个社区提供服务，并将其提供为新的社区，并通过宣传宣传的培训，并将其提供为良好的宣传。统计方法。 结果将融入公共和K-5外展，这已经是每个研究人员活动的常规部分。