The Energy-dependent Gamma-Ray Light Curves and Spectra of the Vela Pulsar in the Dissipative Magnetospheres
Abstract
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 are computed by a pseudo-spectral method with a high-resolution simulation in the rotating coordinate system, which produces a near-FFE field structure with the dissipative region only near the equatorial current sheet outside the light cylinder. We use the test-particle trajectory method to compute the energy-dependent γ-ray light curves and 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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 2024
- DOI:
- 10.3847/1538-4357/ad1f67
- arXiv:
- arXiv:2403.06179
- Bibcode:
- 2024ApJ...962..184C
- Keywords:
-
- Pulsars;
- Magnetic fields;
- Gamma-rays;
- 1306;
- 994;
- 637;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- Accepted by ApJ