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arXiv 1002.2607astro-ph.HEastro-ph.GA
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从PSR J0034-0534和Fermi LAT发现脉冲$γ$ -射线:共位射电和$γ$ -射线发射区的情况

Discovery of Pulsed $γ$-rays from PSR J0034-0534 with the Fermi LAT: A Case for Co-located Radio and $γ$-ray Emission Regions

The Fermi LAT Collaboration, Pulsar Timing Consortium

摘要:

费米大天区望远镜(LAT)探测到了8个毫秒级脉冲星(MSP)发出的0.1 GeV以上的脉冲,从而确定了MSP是一类γ射线辐射源。利用13个月的LAT数据,从MSP PSR J 0034 -0534中检测到了射电周期的重要伽马射线脉动,这是LAT第九次明确的MSP检测。伽马射线光变曲线显示出两个相位相差0.274 $\pm$ 0.015的峰值,它们与射电峰值非常接近,这种现象直到现在才在蟹状星云脉冲星中看到。该脉冲星的$\geq$ 0.1 GeV谱符合指数截止幂律,截止能量为1.8 $\pm 0.6\pm$ 0.1 GeV,光子指数为1.5 $\pm 0.2\pm$ 0.1,第一误差是统计误差,第二误差是系统误差。无线电和伽马射线峰值的近对齐强烈表明无线电和伽马射线发射区位于同一位置,两者都是苛性形成的结果。

英文摘要:

Millisecond pulsars (MSPs) have been firmly established as a class of gamma-ray emitters via the detection of pulsations above 0.1 GeV from eight MSPs by the Fermi Large Area Telescope (LAT). Using thirteen months of LAT data significant gamma-ray pulsations at the radio period have been detected from the MSP PSR J0034-0534, making it the ninth clear MSP detection by the LAT. The gamma-ray light curve shows two peaks separated by 0.274$\pm$0.015 in phase which are very nearly aligned with the radio peaks, a phenomenon seen only in the Crab pulsar until now. The $\geq$0.1 GeV spectrum of this pulsar is well fit by an exponentially cutoff power law with a cutoff energy of 1.8$\pm 0.6\pm$0.1 GeV and a photon index of 1.5$\pm 0.2\pm$0.1, first errors are statistical and second are systematic. The near-alignment of the radio and gamma-ray peaks strongly suggests that the radio and gamma-ray emission regions are co-located and both are the result of caustic formation.

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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