Population Syntheses of Millisecond Pulsars from the Galactic Disk and Bulge
Population Syntheses of Millisecond Pulsars from the Galactic Disk and Bulge
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DOI：
10.3847/1538-4357/aad08d
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发表时间：
2018-06
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影响因子：
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通讯作者：
P. Gonthier;A. Harding;E. Ferrara;S. Frederick;Victoria E. Mohr;Yew-Meng Koh
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作者：
P. Gonthier;A. Harding;E. Ferrara;S. Frederick;Victoria E. Mohr;Yew-Meng Koh
本文介绍了银河盘射电和γ射线毫秒双星（MSP）的总体合成结果。利用在13次射电巡天中探测到的92个射电MSP和在第一个点源星表中探测到的54个Fermi MSP，我们建立了6个自由参数，分别对应于射电和γ射线经验光度模型的总因子、周期指数和周期导数依赖性。我们测试三个高能量的发射模型描述的两极焦散缝隙间隙，外间隙，和对饥饿的极帽几何形状。模拟的脉冲星性质分布充分描述了GD探测到的MSP的分布。我们探讨了球状星团和星系核球中MSP群的γ射线辐射。模拟预测了在其他点源目录中检测到的合理数量的费米MSP，并预计费米观测MSP的光明未来，预计GD在10年内总共检测到170个MSP。我们模拟的球状星团中的MSP的数量与费米探测得到的一致。模拟预测，银河核球中大约需要11，000个MSP来解释γ射线星系中心过剩。
We present the results of a population synthesis of radio and γ-ray millisecond pulsars (MSPs) from the galactic disk (GD). Using 92 radio MSPs detected in 13 radio surveys and 54 Fermi MSPs detected as point sources in the first point source catalog, we establish six free parameters corresponding to the overall factor and the exponents of the period and period derivative dependence for each of the radio and γ-ray empirical luminosity models. We test three high-energy emission models described by the two-pole caustic slot-gap, outer-gap, and pair-starved polar-cap geometries. The simulated distributions of pulsar properties adequately describe the distributions of detected MSPs from the GD. We explore the γ-ray emission from groups of MSPs in globular clusters and in the galactic bulge. The simulation predicts reasonable numbers of Fermi MSPs detected in the other point source catalogs and anticipates a bright future for Fermi observations of MSPs, expecting a total of ≈170 MSP detections from the GD within 10 years. Our numbers of simulated MSPs in globular clusters are in agreement with those derived from Fermi detections. The simulation predicts that about 11,000 MSPs in the galactic bulge are required to explain the γ-ray galactic center excess.