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arXiv 0912.3887astro-ph.HE
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费米Gamma-Ray空间望远镜测量的高能Cosmic Ray电子谱:一些可能的解释

The High Energy Cosmic Ray Electron Spectrum measured by Fermi Gamma-Ray Space Telescope: some possible interpretations

Giuseppe Di Bernardo, Daniele Gaggero, Dario Grasso

摘要:

费米大口径望远镜(LAT)提供了从20 GeV到1 TeV的高能量宇宙线电子正电子(CRE)谱的测量,其精度是前所未有的。最近,这个范围已经扩展到~ 7 GeV。该光谱没有显示出显著的特征,并且比从先前的几个实验中推断出的要难得多。虽然单独报道的费米-LAT数据可以用单个(电子主导的)银河系成分来解释,但当与其他补充实验结果相结合时,特别是H.E.S.S.测量的CRE光谱,特别是PAMELA测量的正电子分数,似乎需要额外的电子和正电子分量。我们表明,银河系恒星中电子-正电子对的加速可能为所有这些结果提供一个自然的(尽管不是唯一的)解释。

英文摘要:

The Fermi Large Area Telescope (LAT) has provided the measurement of the high energy cosmic ray electrons plus positrons (CRE) spectrum with unprecedented accuracy form 20 GeV to 1 TeV. Recently this range has been extended down to ~ 7 GeV. The spectrum shows no prominent features and it is significantly harder than that inferred from several previous experiments. While the reported Fermi-LAT data alone may be interpreted in terms of a single (electron dominated) Galactic component, when combined with other complementary experimental results, specifically the CRE spectrum measured by H.E.S.S., and especially the positron fraction measured by PAMELA, an additional electron and positron component seems to be required. We show that the acceleration of electron-positron pairs in Galactic pulsars may offer a natural (though not unique) interpretation of all those results.

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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