脉冲星缝隙的高空辐射：蟹状星云脉冲星
High-Altitude Emission from Pulsar Slot Gaps: The Crab Pulsar
摘要：
我们提出了一个3D模型的光伽马射线发射的旋转动力脉冲星的槽隙加速器的结果。初级电子在缝隙间隙的未屏蔽电场中加速到高空，达到辐射反应极限的洛伦兹因子为2 x 10 ^7，而来自较低高度级联的电子-正电子对沿着缝隙间隙内部的场线流动。曲率，同步加速器和逆康普顿辐射的初级电子和对产生广泛的光谱发射从红外线到GeV的能量。原色和对都经历无线电光子的回旋共振吸收，使它们能够保持显著的俯仰角。来自具有洛伦兹因子为10 ^2 - 10 ^5的幂律能谱的对的同步辐射在10 MeV以下的能谱中占主导地位。同步辐射和曲率辐射的主要从10兆电子伏到几个GeV。我们研究的能量依赖的脉冲轮廓和相位分辨光谱的参数的蟹状星云脉冲星作为一个函数的磁倾角和视角，比较宽带数据。在大多数情况下，脉冲轮廓由拖尾场线上的焦散线支配。我们还探讨了高能和射电轮廓的关系，以及在射电锥发射中形成焦散的可能性。我们发现，蟹状星云脉冲星的轮廓和光谱可以相当好地再现了一个模型，视角为45度和倾角为100或80度。该模型预测，低于200兆电子伏的缝隙间隙发射将表现出与无线电发射的时间和相位的相关性。
英文摘要：
We present results of a 3D model of optical to gamma-ray emission from the slot gap accelerator of a rotation-powered pulsar. Primary electrons accelerating to high-altitudes in the unscreened electric field of the slot gap reach radiation-reaction limited Lorentz factors of 2 x 10^7, while electron-positron pairs from lower-altitude cascades flow along field lines interior to the slot gap. The curvature, synchrotron and inverse Compton radiation of both primary electrons and pairs produce a broad spectrum of emission from infra-red to GeV energies. Both primaries and pairs undergo cyclotron resonant absorption of radio photons, allowing them to maintain significant pitch angles. Synchrotron radiation from pairs with a power-law energy spectrum with Lorentz factors 10^2 - 10^5, dominate the spectrum up to 10 MeV. Synchrotron and curvature radiation of primaries dominates from 10 MeV up to a few GeV. We examine the energy-dependent pulse profiles and phase-resolved spectra for parameters of the Crab pulsar as a function of magnetic inclination and viewing angle, comparing to broad-band data. In most cases, the pulse profiles are dominated by caustics on trailing field lines. We also explore the relation of the high-energy and the radio profiles, as well as the possibility of caustic formation in the radio cone emission. We find that the Crab pulsar profiles and spectrum can be reasonably well reproduced by a model with viewing angle 45 degrees and inclination angle 100 or 80 degrees. This model predicts that the slot gap emission below 200 MeV will exhibit correlations in time and phase with the radio emission.
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