中文版 | English
Arid
Searching for Gamma Rays from Galaxy Clusters with the Fermi Large Area Telescope : Cosmic Rays and Dark Matter
Zimmer;Stephan
出版年2013
学位授予单位Stockholms universitet, Fysikum, Stockholms universitet, Oskar Klein-centrum för kosmopartikelfysik (OKC), Stockholm
英文摘要In this licentiate thesis, I report a search for GeV γ rays towards the location of Galaxy clusters. I mainly discuss the results of a search for cosmic-ray (CR) induced γ-ray emission but also briefly elaborate on a related study, searching for Dark Matter (DM)-induced γ-ray emission from Galaxy clusters. In addition, I provide a detailed discussion on the analysis tools that were used and discuss some additional tests that are not included in the papers this licentiate thesis is based on. In a comprehensive search almost covering the entire sky, we find no statistically significant evidence for either DM or CR induced γ rays from galaxy clusters. Thus we report upper limits on CR quantities that exclude emission scenarios in which the maximum hadronic injection efficiency is larger than 21% and associated limits on the maximum CR-to-thermal pressure ratio, . In addition, we update previous flux upper limits given a new set of modeling and taking the source extension into account. For a DM masses below 100 GeV, we exclude annihilation cross sections above ∼ 10−24 cm3 s−1 into bb. For decaying DM, we exclude decay times lower than 1027 s over the mass range of 20 GeV– 2 TeV.
英文关键词Galaxy clusters Gamma rays Cosmic rays Dark matter Fermi-lat Likelihood analysis Joint likelihood Astronomy Astrophysics and Cosmology Astronomi astrofysik och kosmologi
语种英语
URLhttp://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-96231
来源机构Stockholms universitet
资源类型学位论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/247478
推荐引用方式
GB/T 7714		 Zimmer;Stephan. Searching for Gamma Rays from Galaxy Clusters with the Fermi Large Area Telescope : Cosmic Rays and Dark Matter[D]. Stockholms universitet, Fysikum, Stockholms universitet, Oskar Klein-centrum för kosmopartikelfysik (OKC), Stockholm,2013.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Zimmer;Stephan]的文章
百度学术
百度学术中相似的文章
[Zimmer;Stephan]的文章
必应学术
必应学术中相似的文章
[Zimmer;Stephan]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。