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外文期刊>The Astrophysical journal
>DISCOVERY OF PULSED γ-RAYS FROM PSR J0034–0534 WITH THE FERMI LARGE AREA TELESCOPE: A CASE FOR CO-LOCATED RADIO AND γ-RAY EMISSION REGIONS
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DISCOVERY OF PULSED γ-RAYS FROM PSR J0034–0534 WITH THE FERMI LARGE AREA TELESCOPE: A CASE FOR CO-LOCATED RADIO AND γ-RAY EMISSION REGIONS
Millisecond pulsars (MSPs) have been firmly established as a class of γ-ray emitters via the detection of pulsations above 0.1?GeV from eight MSPs by the Fermi Large Area Telescope (LAT). Using 13 months of LAT data, significant γ-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 γ-ray light curve shows two peaks separated by 0.274 ± 0.015 in phase which are very nearly aligned with the radio peaks, a phenomenon seen only in the Crab pulsar until now. The ≥0.1?GeV spectrum of this pulsar is well fit by an exponentially cutoff power law with a cutoff energy of 1.8 ± 0.6 ± 0.1?GeV and a photon index of 1.5 ± 0.2 ± 0.1, first errors are statistical and second are systematic. The near-alignment of the radio and γ-ray peaks strongly suggests that the radio and γ-ray emission regions are co-located and both are the result of caustic formation.
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机译:通过使用费米大面积望远镜(LAT)从八个MSP探测到0.1?GeV以上的脉动,已将毫秒级脉冲星(MSP)牢固地确立为一类γ射线发射器。使用13个月的LAT数据,已从MSP PSR J0034-0534检测到无线电周期中有明显的γ射线脉动,这使其成为LAT第九次清除MSP检测。 γ射线的光曲线显示出两个相距为0.274±0.015的峰,它们与无线电峰非常接近,直到现在,这种现象仅在蟹状脉冲星中可见。该脉冲星的≥0.1?GeV谱符合指数截止功率定律,截止能量为1.8±0.6±0.1?GeV,光子指数为1.5±0.2±0.1,第一个误差是统计误差,第二个误差是系统误差。放射线和γ射线峰的近对准强烈表明放射线和γ射线发射区域位于同一位置,并且两者都是苛性碱形成的结果。
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