Three-dimensional Two-Layer Outer Gap Model: the Third Peak of Vela Pulsar

Details Three-dimensional Two-Layer Outer Gap Model: the Third Peak of Vela Pulsar Three-dimensional Two-Layer Outer Gap Model: the Third Peak of Vela Pulsar

2011-10-23

arxiv.org/abs/1110.5032v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

2011 Fermi Symposium proceedings - eConf C110509

Scientific paper

We extend the two-dimensional two-layer outer gap model to a three-dimensional geometry and use it to study the high-energy emission of the Vela pulsar. We apply this three-dimensional two-layer model to the Vela pulsar and compare the model light curves, the phase-averaged spectrum and the phase-resolved spectra with the recent Fermi observations, which also reveals the existence of the third peak between two main peaks. The phase position of the third peak moves with the photon energy, which cannot be explained by the geometry of magnetic field structure and the caustic effect of the photon propagation. We suggest that the existence of the third peak and its energy dependent movement results from the azimuthal structure of the outer gap.

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