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arXiv 0907.0498astro-ph.HE
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含IceCube的大尺度Cosmic Ray各向异性

Large Scale Cosmic Ray Anisotropy With IceCube

Rasha Abbasi, Paolo Desiati

摘要:

我们报告的宇宙射线的到达方向的各向异性的研究与宇宙射线(CR)粒子的平均能量~ 14 TeV使用的数据从冰立方探测器。IceCube是一个位于南极的中微子观测站,建成后将包括80根弦和6根额外的弦,用于低能阵列Deep Core。这些线部署在1,450至2,450米深的深冰中,每条线包含60个光学传感器。本分析中使用的数据是在2007年4月至2008年3月期间收集的,使用了22根展开的弦。数据包含约43亿个向下的μ子事件。一个二维的天空图的证据0.06%的大尺度各向异性。本工作还介绍了每个CR粒子中位能量为12 TeV和126 TeV时该各向异性的能量依赖性。这种各向异性可能是由一些可能的效应引起的;它可以进一步加强对银河系磁场结构和可能的宇宙射线源的了解。

英文摘要:

We report on a study of the anisotropy in the arrival direction of cosmic rays with a median energy per Cosmic Ray (CR) particle of ~ 14 TeV using data from the IceCube detector. IceCube is a neutrino observatory at the geographical South Pole, when completed it will comprise 80 strings plus 6 additional strings for the low energy array Deep Core. The strings are deployed in the deep ice between 1,450 and 2,450 meters depth, each string containing 60 optical sensors. The data used in this analysis were collected from April 2007 to March 2008 with 22 deployed strings. The data contain ~ 4.3 billion downward going muon events. A two-dimensional skymap is presented with an evidence of 0.06% large scale anisotropy. The energy dependence of this anisotropy at median energies per CR particle of 12 TeV and 126 TeV is also presented in this work. This anisotropy could arise from a number of possible effects; it could further enhance the understanding of the structure of the galactic magnetic field and possible cosmic ray sources.

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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