EMISSION PATTERNS AND LIGHT CURVES OF GAMMA RAYS IN THE PULSAR MAGNETOSPHERE WITH A CURRENT-INDUCED MAGNETIC FIELD
EMISSION PATTERNS AND LIGHT CURVES OF GAMMA RAYS IN THE PULSAR MAGNETOSPHERE WITH A CURRENT-INDUCED MAGNETIC FIELD
复制标题
电流感应磁场脉冲星磁层中伽玛射线的发射模式和光曲线
DOI:
10.1088/0004-637x/743/2/113
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发表时间:
2011-09
影响因子:
4.9
通讯作者:
Zhang, L.
中科院分区:
文献类型:
--
作者:
Li, X.;Zhang, L.
We study the emission patterns and light curves of gamma rays in the pulsar magnetosphere with a current-induced magnetic field perturbation. Based on the solution of a static dipole with the magnetic field induced by some currents (perturbation field), we derive the solutions of a static as well as a retarded dipole with the perturbation field in the Cartesian coordinates. The static (retarded) magnetic field can be expressed as the sum of the pure static (retarded) dipolar magnetic field and the static (retarded) perturbation field. We use the solution of the retarded magnetic field to investigate the influence of the perturbation field on the emission patterns and light curves, and apply the perturbed solutions to calculate the gamma-ray light curves for the case of the Vela pulsar. We find that the perturbation field induced by the currents will change the emission patterns and then the light curves of gamma rays, especially for a larger perturbation field. Our results indicate that the perturbation field created by the outward-flowing (inward-flowing) electrons (positrons) can decrease the rotation effect on the magnetosphere and makes emission pattern appear to be smoother relative to that of the pure retarded dipole, but the perturbation field created by the outward-flowing (inward-flowing) positrons (electrons) can make the emission pattern less smooth.
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DOI:
10.1088/0004-637x/696/2/1084
发表时间:
2008-12
期刊:
The Astrophysical Journal
影响因子:
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作者:
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通讯作者:
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2007-11
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发表时间:
2008-10
期刊:
The Astrophysical Journal Letters
影响因子:
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作者:
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10.1086/383121
发表时间:
2004-01
期刊:
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影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
2008-10
期刊:
The Astrophysical Journal
影响因子:
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作者:
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A. Muslimov;A. K. Harding