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arXiv 0905.0025astro-ph.HEhep-exhep-ph
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用费米大天区望远镜测量20个GeV到1个TeV的Cosmic Ray e++ e-谱

Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope

LAT Collaboration

摘要:

费米大天区望远镜被设计成一个高灵敏度的伽马射线观测站,同时也是一个电子探测器,在300 GeV的能量下,它的接受能力超过2 m^2 sr。基于伽马射线分析,我们已经开发出一种有效的电子检测策略,它提供了足够的背景抑制高达1 TeV的steeer-falling电子光谱的测量。我们的高精度数据表明,电子光谱的能量为E^(-3.0),并没有表现出突出的光谱特征。解释方面的一个传统的扩散模型,以及一个潜在的本地额外的组件进行了简要的讨论。

英文摘要:

Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2m^2 sr at 300 GeV. Building on the gamma-ray analysis, we have developed an efficient electron detection strategy which provides sufficient background rejection for measurement of the steeply-falling electron spectrum up to 1 TeV. Our high precision data show that the electron spectrum falls with energy as E^(-3.0) and does not exhibit prominent spectral features. Interpretations in terms of a conventional diffusive model as well as a potential local extra component are briefly discussed.

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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