Outer-Gap versus Slot-Gap Models for Pulsar High-Energy Emissions: The Case of the Crab Pulsar
Outer-Gap versus Slot-Gap Models for Pulsar High-Energy Emissions: The Case of the Crab Pulsar
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DOI：
10.1086/595000
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发表时间：
2008-10
期刊：
影响因子：
--
通讯作者：
K. Hirotani
中科院分区：
文献类型：
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作者：
K. Hirotani
我们解析地考察了旋转驱动脉冲星作为伽马射线源的能力，并表明它们的位相平均伽马射线通量与自旋下降通量和间隙跨场厚度的乘积成正比，而与发射模型无关。将该方案应用于Crab脉冲星，我们证明了外隙模型重现了观测到的GeV通量，而由于跨场厚度较小，缝隙模型最多能重现观测通量的20%。讨论了伽马射线和自旋下降通量之间的关系。
We analytically examine the capabilities of rotation-powered pulsars as the sources of gamma rays and show that their phase-averaged gamma-ray flux is proportional to the product of the spin-down flux and the gap transfield thickness cubed irrespective of the emission models. Applying the scheme to the Crab pulsar, we demonstrate that the outer-gap model reproduces the observed GeV fluxes and that the slot-gap model reproduces at most 20% of the observed fluxes because of the small transfield thickness. An implication for the relationship between the gamma-ray and the spin-down fluxes is discussed.