Congruity of the Crab pulsar's gamma-ray spectrum with the spectral distribution of tightly focused caustics

Abstract

The spectrum derived here for the most tightly-focused component of the radiation generated by the superluminally moving current sheet in the magnetrosphere of a non-aligned neutron star has a distribution function that fits the entire gamma-ray spectrum of the Crab pulsar on its own. This is the first time that the undivided breadth of this spectrum, from 10^2 to 10^6 MeV, is not only described by a single distribution function but is also explained by means of a single emission mechanism. To illustrate that the derived function describes the spectral distribution of the high-energy emission from any non-aligned neutron star, we analyse, in addition, the spectra of two other gamma-ray pulsars for which sufficiently large datasets are available: PSR J0101-6422 and PSR J1709-4429. From the connection between the parameters of the fitted spectra and the physical characteristics of their sources, we moreover infer certain attributes of the magnetospheres of the analysed pulsars: the angle between the magnetic and spin axes of their central neutron stars, the scale factor of the electric current density that is associated with their current sheet, and the privileged latitudinal direction (relative to the spin axis) in which they are observed.

arXiv comment3 pages, 1 figure. arXiv admin note: substantial text overlap with arXiv:2206.02729

References in corpus (13)

• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• The Second Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
• Fermi Large Area Telescope Observations of the Crab Pulsar and Nebula
• Ab-Initio Pulsar Magnetosphere: Particle acceleration in Oblique Rotators and High-energy Emission Modeling
• Teraelectronvolt pulsed emission from the Crab pulsar detected by MAGIC
• Phase-resolved energy spectra of the Crab Pulsar in the range of 50-400 GeV measured with the MAGIC Telescopes
• Pulsar Radio Emission Mechanism: Radio Nanoshots as a Low Frequency Afterglow of Relativistic Magnetic Reconnection
• Observations of the Crab pulsar between 25 GeV and 100 GeV with the MAGIC I telescope
• Three-dimensional Analytical Description of Magnetised Winds from Oblique Pulsars
• Radiation by the superluminally moving current sheet in the magnetosphere of a neutron star
• The electromagnetic radiation whose decay violates the inverse-square law: detailed mathematical treatment of an experimentally realized example
• The Crab pulsar at VHE
• Energetic requirements of the gamma-ray emission from pulsars: A nonparametric analysis of the data in the Fermi-LAT 12-Year Catalog

Cited by in corpus (3)

• Radio spectra of pulsars fitted with the spectral distribution function of the emission from their current sheet
• Gamma-ray spectra of the Crab, Vela and Geminga pulsars fitted with SED of the emission from their current sheet
• An alternative interpretation of magnetars' traits deduced from the observational data on their outburst fluxes and spectra