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arXiv 2101.04451astro-ph.HE
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用费米粒子探索耗散磁层中与能量有关的辐射性质

Exploring the energy-dependent radiation properties in dissipative magnetospheres with Fermi pulsars

Xiongbang Yang, Gang Cao

摘要:

根据最近的数值模拟结果,认为光柱外的赤道电流片是高能辐射的最有希望的位置。我们利用FIDO磁层曲率辐射计算方法研究了脉冲星的光变曲线和能谱。用谱算法构造了在LC内部具有近无力区而在LC外部具有有限但高电导率的FIDO磁层。通过对加速电场和曲率辐射损失影响下的粒子轨道积分,研究了脉冲星高能辐射特性。作为应用,我们将预测的光变曲线和能谱与Fermi 2PC星表中的蟹状星云和船帆座星云的光变曲线和能谱进行了比较。我们发现,用FIDO模型可以很好地再现蟹状星云和船帆座星云的光变曲线和能谱的观测特征。

英文摘要:

The equatorial current sheets outside the light cylinder(LC) are thought as the promising site of the high energy emission based on the results of the recent numerical simulations. We explore the pulsar light curves and energy spectra by computing the curvature radiation based on the FIDO magnetospheres. The FIDO magnetospheres with a near force-free regime inside the LC and a finite but high conductivity outside the LC are constructed by a spectral algorithm. The pulsar high energy emission properties are explored by integrating the trajectories of the test particles under the influence of both the accelerating electric field and the curvature radiation losses. As an application, we compare the predicted energy-dependent light curves and energy spectra with those of the Crab and Vela pulsars published in Fermi 2PC catalog. We find that the observed characteristics of the light curves and energy spectra from Crab and Vela pulsars can be well reproduced by the FIDO model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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