Radio pulsars with expected gamma radiation and gamma pulsars as pulsating radio emitters

TL;DR

This paper investigates the relationship between radio and gamma-ray emissions in pulsars, identifying potential gamma-ray pulsars among radio sources and vice versa, based on magnetic field and energy loss correlations.

Contribution

It introduces a method to select radio pulsars likely to emit gamma rays and predicts radio emissions from gamma pulsars not yet observed in radio frequencies.

Findings

High magnetic fields near the light cylinder correlate with gamma-ray emission.

A correlation between gamma-ray and radio luminosities enables source prediction.

Lists of candidate pulsars for gamma and radio detection are provided.

Abstract

Pulsars play a crucial astrophysical role as the highly energetic compact radio, X-ray, and gamma-ray sources. Our previous works show that the radio pulsars found as the pulsing gamma sources by the Large Area Telescope (LAT) on the board of the Fermi Gamma-Ray Space Telescope have high values of magnetic field near the light cylinder, two-three orders of magnitude stronger comparing with the magnetic fields of radio pulsars: $\log B_{lc}$ (G) are 3.60-3.95 and 1.75. Moreover, their losses of the rotation energy are also three orders higher than the corresponding values for the main group of radio pulsars on average:$\log \dot E$ (erg/s) = 35.37-35.53 and 32.64. The correlation between gamma-ray luminosities and radio luminosities is found. It allows us to select those objects from all set of the known radio pulsars that can be detected as gamma pulsars with the high probability. We give the list of such radio pulsars and propose to search for gamma emisson from these objects. On the other hand, the known catalog of gamma pulsars contains some sources which are not known as radio pulsars at this moment. Some of them have the large values of gamma luminosities and according to the obtained correlation, we can expect marked radio emission from these objects. We give the list of such pulsars and expected flux densities to search for radiation at frequencies 1400 and 111 MHz.