The annular gap model for gamma-ray emission from young and millisecond pulsars - Astrophysics > High Energy Astrophysical PhenomenaReport as inadecuate




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Abstract: Pulsed high energy radiation from pulsars is not yet completely understood.In this paper, we use the 3D self-consistent annular gap model to study lightcurves for both young and millisecond pulsars observed by the Fermi Gamma-raySpace Telescope. The annular gap can generate high energy emission forshort-period pulsars. The annular gap regions are so large that they haveenough electric potential drop to accelerate charged particles to producegamma-ray photons. For young pulsars, the emission region is from the neutronstar surface to about half of the light cylinder radius, and the peakemissivity is in the vicinity of the null charge surface. The emission regionfor the millisecond pulsars is located much lower than that of the youngpulsars. The higher energy gamma-ray emission comes from higher altitudes inthe magnetosphere. We present the simulated light curves for three youngpulsars the Crab, the Vela, the Geminga and three millisecond pulsars PSRJ0030+0451, PSR J0218+4232, PSR J0437-3715 using the annular gap model. Oursimulations can reproduce the main properties of observed light curves.



Author: Yuan-Jie Du, G. J. Qiao, J. L. Han, K. J. Lee, R. X. Xu

Source: https://arxiv.org/







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