The energy-dependent gamma-ray light curves and spectra of the Vela pulsar in the dissipative magnetospheres
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| Format: | Preprint |
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2024
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| _version_ | 1866911792595206144 |
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| author | Cao, Gang Yang, Xiongbang |
| author_facet | Cao, Gang Yang, Xiongbang |
| contents | We study the pulsar energy-dependent $γ$-ray light curves and spectra from curvature radiation in the dissipative magnetospheres. The dissipative magnetospheres with the combined force-free (FFE) and Aristotelian (AE) are computed by a pseudo-spectral method with the high-resolution simulation in the rotating coordinate system, which produces a near force-free field structure with the dissipative region only near the equatorial current sheet outside the light cylinder (LC). We use the test particle trajectory method to compute the energy-dependent $γ$-ray light curves, phase-average and phase-resolved spectra by including both the accelerating electric field and radiation reaction. The predicted energy-dependent $γ$-ray light curves and spectra are then compared with those of the Vela pulsar observed by Fermi. Our results can generally reproduce the observed trends of the energy-dependent $γ$-ray light curves and spectra for the Vela pulsar. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2403_06179 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The energy-dependent gamma-ray light curves and spectra of the Vela pulsar in the dissipative magnetospheres Cao, Gang Yang, Xiongbang High Energy Astrophysical Phenomena We study the pulsar energy-dependent $γ$-ray light curves and spectra from curvature radiation in the dissipative magnetospheres. The dissipative magnetospheres with the combined force-free (FFE) and Aristotelian (AE) are computed by a pseudo-spectral method with the high-resolution simulation in the rotating coordinate system, which produces a near force-free field structure with the dissipative region only near the equatorial current sheet outside the light cylinder (LC). We use the test particle trajectory method to compute the energy-dependent $γ$-ray light curves, phase-average and phase-resolved spectra by including both the accelerating electric field and radiation reaction. The predicted energy-dependent $γ$-ray light curves and spectra are then compared with those of the Vela pulsar observed by Fermi. Our results can generally reproduce the observed trends of the energy-dependent $γ$-ray light curves and spectra for the Vela pulsar. |
| title | The energy-dependent gamma-ray light curves and spectra of the Vela pulsar in the dissipative magnetospheres |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2403.06179 |