研究成果藝廊
Spectral Hardening in the Trailing Peak of Gamma-ray Pulsar Light Curve
圖片來源: Kouichi Hirotani
Figure 5 of "Pulsar Outer-gap Electrodynamics: Hardening of Spectral Shape in the Trailing Peak in Gamma-ray Light Curve", Kouichi Hirotani, Astrophys. J. 733, Letters 49-53 (2011).
So far, the six brightest gamma-ray pulsars, which allow us to measure
their detailed phase-resolved spectra, all show a spectral hardening
in the second light-curve peak in GeV energies. Specifically, they
show an increase of the "cutoff energy" of a power-law spectral shape
in the second peak.
Considering the actual particle motion in the three-dimensional
pulsar magnetosphere, this work first explained this general behavior
of spectral hardening, as indicated by the lower panel.
