General relativistic corrections in the gamma-ray emission from pulsars
General relativistic corrections in the gamma-ray emission from pulsars
复制标题
脉冲星伽马射线发射的广义相对论修正
DOI：
10.1086/174020
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
A. Harding
中科院分区：
文献类型：
--
作者：
P. Gonthier;A. Harding
我们研究了广义相对论修正对中子星星表面附近伽马射线产生的重要性。由于弯曲时空中磁偶极场的变化，极帽角比平坦时空减小了30%。然而，弯曲的光子轨迹补偿了极冠角的减小，因此，平行于场发射的光子的脉冲轮廓预计在弯曲时空和平坦时空中非常相似。我们发现，弯曲的时空度规显着增加磁场的大小，因此，在磁场中的曲率辐射伽马射线对生产的衰减系数可以增加到100倍。结果表明，当B约为10（exp 12）G时，1GeV光子对产生的存活距离减小了12。
We examine the importance of general relativistic corrections to the production of gamma rays near the surface of a neutron star. Due to the change in the magnetic dipole field in curved spacetime, the polar cap angle decreases by 30% compared to flat spacetime. However, the curved photon trajectories compensate for the decrease in the polar cap angle, and, as a result, the pulse profile of the photons emitted parallel to the field is expected to be very similar in curved spacetime and in flat spacetime. We find that the curved spacetime metric significantly increases the magnitude of the magnetic field and, therefore, the attenuation coefficients of curvature radiation gamma rays for pair production in a magnetic field can be increased by factors as large as 100. As a resutl the survival distance of 1 GeV photons for pair production is decreased by a factor of 2 for B is approximately 10(exp 12) G.