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arXiv 0907.0387astro-ph.HE
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Fermi LAT在20 GeV以下的Cosmic Ray电子谱的第一个结果

First results on Cosmic Ray electron spectrum below 20 GeV from the Fermi LAT

Melissa Pesce-Rollins

摘要:

费米大面积望远镜(LAT)旨在成为之前飞行的太空伽马射线探测器的继任者,也是一种电子探测器。利用它分离电磁信号和强子信号的能力,可以精确地测量宇宙线电子谱。20 GeV以下的初级宇宙线电子谱受太阳调制和地磁截止等多种局部效应的影响。对于低于几个GeV的能量,有可能观察到由局部磁场控制的电子的自旋布居。在本文中,我们提出了LAT电子分析,特别是事件的选择和验证,以及在20 GeV以下的电子能谱测量的第一个结果。

英文摘要:

Designed to be a successor of the previous flown space based gamma ray detectors, the Fermi Large Area Telescope (LAT) is also an electron detector. Taking advantage of its capability to separate electromagnetic and hadronic signals it is possible to accurately measure the Cosmic Ray electron spectrum. The spectra of primary cosmic ray electrons below 20 GeV is influenced by many local effects such as solar modulation and the geomagnetic cutoff. For energies below a few GeV it is possible to observe the albedo population of electrons which are controlled by the local magnetic field. In this paper we present the LAT electron analysis in particular event selection and validation as well as the first results on the measurement of the electron spectrum below 20 GeV.

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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