Extremes Meet: Radio and Gamma-Ray Observations of Clusters of Galaxies, from Dark Matter to Cosmic Rays

极端相遇：星系团的射电和伽马射线观测，从暗物质到宇宙射线

• 批准号: 1517545
• 负责人: Tesla Jeltema
• 金额: $ 32.5万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1517545&HistoricalAwards=false
• 关键词: Extremes; Meet; Radio; Gamma; Ray

The proposal aims to use observations of galaxy clusters to investigate models for dark-matter particles. Galaxy clusters can be thought of as enormous reservoirs of non-radiating, thus "dark", matter. Particles of dark matter respond to the force of gravity, but little else is known about them. Theories predict that dark-matter particles will annihilate or decay, yielding gamma-ray emission plus high-energy electrons and positrons that can radiate in other regions of the electromagnetic spectrum. The team's models show that the products of dark-matter annihilation are best traced via their radio emission, and they will use galaxy clusters to investigate that radio linkage. The team's models also show that the products of dark-matter decay are best traced via their gamma-ray emission, and they will use galaxy clusters to investigate that gamma-ray linkage. Finally, the team will modify their models and apply them to unusual clusters that exhibit radio halos, to try to solve the long-standing problem of the halos' origin. The PI will continue her efforts at departmental, institutional, and national levels to promote the involvement of women in physics. She will expand these departmental and institutional efforts to include other underrepresented groups

该提案旨在利用对星系团的观测来研究暗物质粒子模型。星系团可以被认为是非辐射物质（即“暗”）物质的巨大储存库。暗物质粒子会对重力做出反应，但我们对它们知之甚少。理论预测暗物质粒子将湮灭或衰变，产生伽马射线发射以及可以辐射电磁波谱其他区域的高能电子和正电子。该团队的模型表明，暗物质湮灭的产物最好通过其无线电发射来追踪，他们将使用星系团来研究无线电联系。该团队的模型还表明，暗物质衰变的产物最好通过其伽马射线发射来追踪，他们将使用星系团来研究伽马射线联系。最后，该团队将修改他们的模型并将其应用于表现出射电光晕的不寻常星团，以尝试解决光晕起源的长期问题。 PI 将继续在部门、机构和国家层面努力促进女性参与物理学。她将扩大这些部门和机构的努力，以包括其他代表性不足的群体