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arXiv 1209.5589astro-ph.HEastro-ph.IM
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成像空气切伦科夫望远镜间接探测暗物质的优化分析方法

Optimized analysis method for indirect dark matter searches with Imaging Air Cherenkov Telescopes

Jelena Aleksic, Javier Rico, Manel Martinez

摘要:

我们提出了一个专门的分析方法,间接暗物质搜索成像空气切伦科夫望远镜。通过使用全似然分析,我们充分利用了暗物质起源的伽马射线谱中预期的独特特征,相对于标准分析链实现了更好的灵敏度。我们描述的方法和表征其一般性能。我们还比较了它的灵敏度与目前的标准,几个暗物质湮灭模型,获得的增益高达10倍的顺序。我们计算改进的限制,可以达到使用这种新的方法,作为一个例子,现有的几个基准模型的估计,以及最近的结果从VERITAS观测矮球状星系Segue 1。此外,我们估计切伦科夫望远镜的单色线信号的灵敏度。对MAGIC和CTA可以实现的改进进行了预测。最后,我们讨论了如何将这种方法应用于一个全球性的,灵敏度优化的间接暗物质搜索,结合了当代所有切伦科夫天文台的结果。

英文摘要:

We propose a dedicated analysis approach for indirect Dark Matter searches with Imaging Air Cherenkov Telescopes. By using the full likelihood analysis, we take complete advantage of the distinct features expected in the gamma ray spectrum of Dark Matter origin, achieving better sensitivity with respect to the standard analysis chains. We describe the method and characterize its general performance. We also compare its sensitivity with that of the current standards for several Dark Matter annihilation models, obtaining gains of up to factors of order of 10. We compute the improved limits that can be reached using this new approach, taking as an example existing estimates for several benchmark models as well as the recent results from VERITAS on observations of the dwarf spheroidal galaxy Segue 1. Furthermore, we estimate the sensitivity of Cherenkov Telescopes for monochromatic line signals. Predictions are made on improvement that can be achieved for MAGIC and CTA. Lastly, we discuss how this method can be applied in a global, sensitivity-optimized indirect Dark Matter search that combines the results of all Cherenkov observatories of the present generation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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